Smart Ruler is the first app that I developed. It is in the 1st set of Smart Tools suite. When I tried to develop a distance-app, I saw a similar iPhone app. At the time, there was no such app in Google Play, so that I had developed it for 2 days. I have updated it for 5 years. :-)
※ How to use??
1) Put an object on the screen of your device.
2) Adjust its left edge to the left of the screen.
3) Touch the screen, and adjust its right edge with a red line. That's it.
※ Introduction video
※ Screenshots 1) single-touch
2) multi-touch
You can choose text and background color at the settings.
※ Menu & Settings
※ Calibration
- This app includes a database of 2000+ major android devices. If yours is a brand-new or unique device, please calibrate this app on it. Measure your ACTUAL screen width and input the number at calibrate menu. See the screenshot below.
※ FAQ
Q. The screen width is not correct.
A. Click the calibrate icon on the appbar. Please let me know your actual width. I'll register it to the next update. androidboy1@gmail.com
Q. I cannot touch my screen.
A. A wet finger or a conductive material may frustrate your touch.
※ Pro version additional features:
1) 6 tools (protractor3, level, thread) are integrated
2) Horizontal x Vertical
3) Architectural and Engineering Scales
4) More languages supported
5) No ads
※What's new
- v1.5.0 : More models are calibrated
- v1.5 : Material design
- v1.4 : ActionBar added
- v1.3 : App2SD
- v1.2 : Tablet PCs support
- v1.0 : Smart Ruler released (June, 2010) https://play.google.com/store/apps/details?id=kr.sira.ruler
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Smart Compass Pro is the 3rd set of Smart Tools suite. It includes 3 tools (Compass, GPS, Metal Detector) and has 4 major features below.
1) Although you turn your device into portrait or landscape, the heading is fixed.
2) Camera view is used for reality.
3) Metal Detector is included to verify the embedded sensors.
4) GPS is supported.
※ Introduction video
Ⅰ. Compass
1) Standard (default) : camera on/off
2) Telescope : camera zoom
3) Night : dim backlight, red text
4) Digital : without center wheel
5) Google Maps
6) Google Maps (satellite)
- Lensatic compass (pitch, roll)
- Azimuth types : Degree, Mil, Quadrants and Back Azimuth
- You can turn on/off camera view
※ Background image
- [Background image] option can show recent 50 thumb nails from your gallery.
- When the picture that you want to select does not appear, rename its name as "compass.png" or "compass.jpg". Then it will appear at the beginning.
※ If the compass is not accurate ...
- The compass accuracy depends on the performance of your sensors exactly. If the direction is wrong, it means that one of your sensors is poor. Don't blame compass apps.
- Confirm that the magnetic field is normal. It is about 49μT in nature. If it is out of bounds, initialize the sensor. Point your phone up towards the sky and move it in a figure 8 pattern.
- Since 2014, Samsung view covers with a magnet or a leather cases with a magnetic snap used to cause unwanted results.
- I had a Galaxy Ace phone that was 4 years old. It was very very inaccurate. To my surprise, it worked perfectly after replacing the battery with new one.
※ Acceleration sensor turn On/Off
- This compass requires many sensors (acceleration sensors, magnetic sensor, orientation sensor) to improve direction features. When this becomes inaccurate, it means that one of your sensors is poor.
※ Find your best calibration
- This compass has several options. If one of your sensors are unstable, some azimuth will be incorrect. I wish that you find your best mode through experience.
1) Acceleration : On / Off
2) Screen : Portrait / Landscape
3) How to hold : Portrait / Landscape / Flat on a desk.
※ For example, Moto's best mode is [Acceleration Off, Portrait, Flat].
※ Sharing function
- Before taking a screenshot : the share icon can send only your location via email.
- After taking a screenshot : you can share both the screenshot and location via SNS.
Ⅱ. GPS
GPS can support 5 main features
1) True north
2) Various Coordinate types
3) Qibla finder, Car locator
4) GPS Speedometer
5) Share you location
※ True north vs. Magnetic north
- When you turn on [True North] option, the app will calculate true north with your GPS location.
- When GPS is available, the app will show "True north : xx˚ ". xx means "magnetic declination". Positive means that magnetic field is rotated east that much from true north.
- If true north does not appear, please activate GPS hardware.
- To confirm your magnetic declination, visit this website. File:World Magnetic Declination 2010.pdf
※ Qibla finder / Car locator
- If you are a Muslim, you can use this feature as a Qibla (Mecca) finder.
- Otherwise, you can use it as a car-locator.
- When you park your car in a parking lot, open [input location] menu and click [Here] button so as to save current location. You can use this feature as various destination finders. (home, office, ...)
- The grey icon shows the list of inputted locations.
※ Network GPS ??
- When your device cannot receive your location from GPS satellites in the sky, this compass can get your location from your telecom carrier. It is called as [Network GPS].
- Network GPS is the auxiliary GPS via Wi-Fi, IP-address and 3G/4G. It cannot get the altitude and error tolerance will occur within 150m - 2.5km.
- I have a plan to improve GPS feature with Google Play Location service.
Ⅲ. Metal Detector
This app measures magnetic field values using the embedded magnetic sensor. The magnetic field level (EMF) in nature is about 49μT(micro tesla) or 490mG (milligauss); 1μT = 10mG. If there is any metal in the area, the strength of the magnetic field should increase. Among other uses, it can help you find electrical wires in the wall and a spade under the ground.
Usage is simple: Just open this app, and move it around; The magnetic field values will constantly fluctuate. That's it!
The accuracy depends entirely on the performance of your magnetic sensor. Note that the magnetic sensor is affected by electronic equipment (TVs, PCs, etc.) due to electromagnetic waves.
※ Color grades of chart
① Green : Magnetic field level in nature within tolerance.
② Blue : Too low. The sensor might be weakened because of phone heating and age. You should cool down your phone. Otherwise, replace the battery with new one.
③ Red : Too high. There is a metal object nearby. If the value is very high (+170μT), a vibration occurs. To stop it, click the stop icon. You can turn on/off alarm sound at the settings.
※ Settings
- Alarm level : Select the threshold value of alert.
- Beep sound : choose from 4 different sound types.
※FAQ
Q. The compass does not work or says "MAGNETIC Sensor Error".
A. Some devices (like Galaxy J, Moto 4G) have NO magnetic sensor. Please check your specifications carefully. Otherwise, your embedded sensor was out of order.
Q. The compass shows the wrong direction.
A. The reason is that your embedded sensors are unstable and weakened by time. In order to initialize them, point your device up towards the sky and move it in a figure 8 motion.
Q. What is the orange triangle on the wheel?
A. It denotes the topside of your device.
Q. Can the metal detector find a hidden camera and ghost?
A. If they generate magnetic (electric) field, it is possible to search them. Many users used this app to find electrical wires in the wall.
Q. Where is the screenshot stored?
A. /storage/emulated/0/smart-tools/ or /storage/sdcard0/smart-tools/ or /mnt/sdcard/smart-tools/. Surely you can find your screenshots in your Gallery.
※What's new
- v2.7 : Sensor stabilization with filter enhancements
- v2.6.6 : Night mode (red, green)
- v2.6.3 : Metal option changed, Google Maps update
- v2.6.1 : Material design
- v2.5.1 : Screen capture, Share with
- v2.5 : ActionBar, Portrait mode
- v2.4 : Qibla finder
- v2.3.3 : True North, UTM coordinate
- v2.3 : Accellation Sensor on/off
- v2.2 : Tablet PCs support
- v2.0 : Smart Compass Pro released (Oct, 2010) https://play.google.com/store/apps/details?id=kr.aboy.compass
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Smart Compass is a tool to search bearings (direction, azimuth) using a magnetic sensor in your device. You can select either magnetic north or true north.
It has 4 major features.
1) Although you turn your device into portrait or landscape mode, the heading is fixed.
2) Camera view for reality.
3) It shows magnetic field level to verify embedded sensors.
4) GPS and Google Maps are supported.
※ Introduction video
※ Compass modes
1) Standard (default) : camera on/off
2) Telescope : binoculars, camera zoom
3) Night : make screen dim, red <-> green toggle
4) Digital : no center wheel
5) Google Maps
6) Google Maps (satellite)
※ Wrong direction ???
- The compass accuracy depends on the performance of your sensors. If the direction is incorrect, it means that one of your sensors is poor or out of order. Don't blame compass apps.
- Confirm that magnetic field is normal (about 49μT in nature). If it is out of bounds, initialize your sensor. Point your device up towards the sky and move it in a figure 8 pattern. Please watch the YouTube video below.
- Since 2014, Samsung view covers with a magnet or a leather cases with a magnetic snap used to cause unwanted results.
- The direction may be wrong when the battery level is low. Please charge the battery fully. I had a Galaxy Ace phone that I used for 5 years. It was very inaccurate. To my surprise, it worked perfectly after replacing the battery.
※ Menu & Settings
※ Background image
- [Background image] option can show recent 50 thumb nails from your gallery.
- When the picture that you want to select does not appear, rename its name as "compass.png" or "compass.jpg". Then it will appear at the beginning.
※ Acceleration sensor turn on/off
- My compass requires 2-3 sensors (acceleration sensor, magnetic sensor, orientation sensor) to improve the performance.
- If your device had unstable sensors, the direction could be inaccurate. I had heard that several Motorola devices (Droid X, RAZR, BIONIC...) had this issue.
- In this case, turn off [Acceleration sensor] option. This app will use an orientation sensor only.
※ True north vs. Magnetic north
- When you turn on [True North] at the settings, this app will calculate true north with your GPS location.
- When GPS is available, the app will show "True north : xx˚ ". xx means "magnetic declination". Positive means that magnetic field is rotated east that much from true north.
- If true north does not appear, please activate GPS hardware.
- To confirm your magnetic declination, visit this website. File:World Magnetic Declination 2010.pdf
※ How to save battery
- Turn off [Camera] and [GPS] at the settings.
- Select [Slow] in sensor response option
- Never use the Home button to exit the app. To close the app completely, use More menu > Exit
※ FAQ
Q. The compass does not work or says "Magnetic Sensor Error!!".
A. Some new devices (Galaxy J, Moto G4, Micromax ...) have no magnetic sensor. Please check your specs.
Q. The compass works, but it shows wrong direction.
A. I guess that your embedded sensors are unstable and weakened by time. Reboot your device and initialized your sensor, go menu -> calibration menu.
Q. GPS information does not appear.
A. Some firmware has GPS hardware trouble. First, restart your device and check location settings.
Q. True north does not appear.
A. The app can calculate true north after GPS is activated.
Q. How to run auto-focusing and camera zoom?
A. Press volume buttons on the side of your device.
Q. Why does this app require internet connection?
A. The connection is required for Google Maps and ads.
Q. What is the orange triangle?
A. It denotes the topside of your device. No matter how you hold the compass in portrait or landscape or even cross but it should be in vertical condition.
Q. How to mute video ads?
A. Turn off [Sound effect] at the settings.
※ Pro version additional features:
1) No ads
2) Direction (Qibla finder, car locator) features
3) Sharing your location and screenshots via SNS and email
※What's new
- v1.8 : Sensor stabilization with filter enhancements
- v1.7.7 : Night mode update (red-green toggle)
- v1.7.4 : New icon
- v1.7.3 : Google Maps update
- v1.7.0 : Jpeg with GPS tag
- v1.7 : Material design
- v1.6 : GPS, True north, Google Maps
- v1.5 : Action Bar
- v1.4 : Acceleration sensor on/off
- v1.3 : Tablet PC support.
- v1.0 : Smart Compass released (Aug. 2010) https://play.google.com/store/apps/details?id=kr.sira.compass
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Hello, I'm androidboy.
For 4 months, I have added Material Design on Smart Tools package app.
It took too much time because the app includes 15+ tools. I had developed new functions, posted all blog articles, took youtube videos and re-drawn images. I'm going to release this version on Feb, 2016.
Set 1: Length, Angle, Slope, Level, Thread - Smart Ruler Pro
Set 2: Distance, Height, Width, Area - Smart Measure Pro
Set 3: Compass, Metal detector, GPS - Smart Compass Pro
Set 4: Sound meter, Vibrometer - Sound Meter Pro
Set 5: Flashlight, Magnifier, Mirror - Smart Light Pro
Set 6: Unit - Unit Converter Pro
※FAQ
Q. Downloading error occurs.
A. Open phone Settings > Apps > Google Play Store and clicked on 'Clear data/cache' .
Q. I changed my phone. Google Play app shows "The app is not compatible.".
A. This package app requires a magnetic sensor. Several brand-new devices (Moto G4, Galaxy J...) had no magnetic sensor. Please check your device's specs.
Q. How to create a shortcut?
A. The app has the shortcuts of 6 tools(compass, sound, unit, flashlight, magnifier and mirror). Like widgets, you can create a shortcut in home screen.
※What's new
- v2.0.4 : New icons, unit converter update (dark style).
- v2.0.3 : Compass update (UTM, MGRS input)
- v2.0.2a : Bug fix on flashlight widget of OS 2.3
- v2.0.2 : Vibrometer and level update.
- v2.0.1 : Unit converter update.
- v2.0 : Material design
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Hello. I'm android boy, the chief developer of Smart Tools co,.
Sound Meter Pro is the 4th set of the Smart Tools suite. It includes 2 tools (sound meter, vibrometer).
※ Introduction video
Ⅰ. Sound Meter
This tool is using your built-in microphone so as to measure sound pressure, and shows a reference. It can be called as SPL (sound pressure level) meter.
① Menu
② Statistic menu (save / load / CSV export)
③ Screen capture
3 Red lines mean max, mean and min values.
④ Refresh : to reset, long-click on the center of meter or click this refresh icon
⑤ Text / Chart toggle
⑥ Black / White toggle : make your screen dim for saving battery
⑦ Play / Pause toggle
※Examples of sound pressure
20dB : Rustling leaves, Ticking watch
30dB : Quiet whisper at 3 ft, Library
40dB : Quiet residential area, Park
50dB : Quiet office, Quiet street
60dB : Normal conversation at 3 ft
70dB : Busy traffic, phone ringtone
80dB : Busy street, alarm clock
90dB : Factory machinery at 3 ft
100dB : Subway train, Heavy snoring(2ft)
110dB : Rock music, Screaming child
120dB : Threshold of pain, Thunderclap
130dB : Jet engine at 100 ft
180dB : Space shuttle lift-off
※ Don't blame this app for Maximum Limitation Most microphones are aligned to human voice (300-3400Hz, 40-60dB). It is enough for voice calls. But it occurs an issue of 16 bits microphone limitation.
See sound pressure at calibrate menu. It'll stop at 32767 (32767=2^15-1). In conclusion, 16 bits microphones cannot measure above 96 dB. (more link)
Because of additional optimization (background noise reduction), some devices can measure at most 80 dB. Galaxy S3-S5(81-84db), HTC Desire HD(85db), Galaxy Note(81/91db). Most of Motorola and Amazon devices can measure 96 dB fully.
Last year, a german user suggested a trick in order to bypass hardware limitation. Add +30dB at calibrate menu, and close your microphone hole with your finger, so that you can measure a sound over 100dB. Try it out. :)
※ Menu & Settings
① Upside down : Most smartphones have a microphone hole at the bottom. It is recommended to point the microphone to the sound source. How? Upside down!
※ Statistic Menu
① Save : enter title name for current chart
② Load : load the charts stored. To remove a chart, long-click and select [delete] option.
③ Export : export current data as CSV file into SD card. Move it into PC and open with MS-Excel. This function can store up to 24 hours. Here is an example. time[hh:mm:ss],dB 12:40:21,52 12:40:22,52 12:40:23,54 ...
※ How to calibrate Sound Meter ???
Since 2010, we had calibrated the app on 500+ android devices (major Galaxy, LG, Xperia, Motorola and Nexus). It's a pity that the results were changed easily depending on OS version.
In order to calibrate the app correctly, you must compare it with an ACTUAL sound level meter. Otherwise, ensure that the measured value of a very quiet room is 30-35dB. If the result were out of range, you could add/reduce number at the calibrate menu.
It is an auxiliary tool for reference. Just enjoy it.
※ Level Nofitication
A lot of users, especially school teachers, wanted to know if their voices were loud. Turn on [Level Notification] option at the settings.
60dB+ : green, 70dB+ : pink, 80dB+ : red. It is a pity that Sound alarm cannot be used due to amplification.
Ⅱ. Vibration Meter
This tool is using a 3-axis acceleration sensor so as to measure device's vibration, movement or the earthquake, and shows a reference. The value is releated to Modified Mercalli Intensity scale(MMI). It has no unit.
① Menu
② Statistic menu (save / load / CSV export)
③ Screen capture
④ Refresh : to reset, long-click on the center of meter
⑤ Play / Pause toggle
⑥ Alarm : show current alarm situation
※Examples of MMI earthquake scale
I : Instrumental. Felt by animals
II : Weak. Felt indoors by a few people
III : Slight. Felt indoors by several people
IV : Moderate. Hanging objects swing
V : Rather Strong. Some dishes broken
VI : Strong. Heavy furniture moved
VII : Very Strong. Difficult to stand
VIII : Destructive. Fall of walls
IX : Violent. Noticeable cracks in ground
X : Intense. Almost destroyed
XI : Extreme. Rails bent greatly
XII : Cataclysmic. Total destruction
※ How to calibrate Vibration meter ???
Most acceleration sensors are unstable and weakened easily, so that calibration is required.
① Go calibrate menu.
② Shake your device as possible as you can. Increase / decrease its sensitivity so that max value reaches about 10-11.
③ Check your unnecessary value measured by no movement.
④ Click [Cut Baseline] button and select an number.
⑤ Repeat ②-④ several times.
※FAQ
Q. It says "Unable to open microphone.".
A. Other app occupied your microphone. Just restart your device.
Q. Where can I find the Screenshot and CSV file?
A. /storage/emulated/0/smart-tools/, /storage/sdcard0/smart-tools/, /mnt/sdcard/smart-tools/.
Q. I hear nothing. But the app shows 30-40 dB.
A. A microphone cannot catch very low-frequency noise. 0 dB means the vacuum of space.
Q. Is the result dBA weighted?
A. Yes, I calibrated the app with a actual SPL meter with dBA. But db(A) makes no sense because the result is not perfect.
Q. How to disable tick sound switching from chart to text?
A. Turn off [Sound effect] option at the settings.
Q. What is the unit of vibration?
A. It has no unit, just the scale for reference.
※What's new
- v2.5.9 : Galaxy S10 support
- v2.5.3 : New icon, Share menu
- v2.5.2 : Vibration alarm on/off
- v2.5.1 : Screen catpure on statistic menu
- v2.5 : Material design
- v2.4 : Action Bar
- v2.3 : Export as CSV file
- v2.2 : Statistic menu and save log.
- v2.1 : New icon
- v2.0 : Sound Meter Pro released (Jan. 2011) https://play.google.com/store/apps/details?id=kr.aboy.sound
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Smart Distance is a range-finder using camera perspective. There are 20,000+ Android devices in the world, with different camera lenses and performance. So it is not easy to measure the target's distance with camera view. I calibrated the app on 700+ major devices for 3 years.
※ Introduction video
※ How to use
1) To measure the distance from a target, enter its height (width). 2) Adjust the target to green lines by touching screen. By the way, do you know target's approximate height (width)? ※ Target's height or width???
For accurate measurement, it is important to know the height (width) of a target exactly.
Don't worry. We can guess the height (width) of objects around us.
- Height
man : 1.7m (5.6ft), golf flag : 2.1m (7ft), door : 2.0m (6.5-7.0ft)
- Width
car : ~4.5m (Mini : 3.8m, sedan : 4.5m, SUV : 5.0m), bus : 10m (33ft)
We also can find target's specifications. For example, The Statue of Liberty = 93m (305ft), The Boeing 777 = 74m (243ft)
※ Golf-rangefinder ???
This app can be a good tool for golf players because you know the height of golf flags.
※ Menu & Settings ①Distance by height / ②Distance by width
※ How to calibrate it
Is the distance inaccurate? You can calibrate it with [Height(Width) Calibration] at the settings. When height calibration is 36, it means that your camera view has 36 degrees range vertically.
※ Pro version additional features:
1) No ads
2) Speed gun is integrated
※What's new
- v1.5 : Galaxy S10 and OS 9 support
- v1.4.8 : Move with arrows, ft fractions
- v1.4 : Material design
- v1.3 : Action bar
- v1.2 : 10 languages support
- v1.0 : Smart Distance released (Feb, 2011) https://play.google.com/store/apps/details?id=kr.sira.distance
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Hello. I'm android boy, working for Smart Tools co.,
Unit Converter pro is ad-free version with more features. Ads are replaced with useful messages(formula, unit name). This article shows instructions for package version.
I'm sorry that currency exchange rates feature was removed because of the lack of internet permission.
※ Introduction video
※ Unit sections
① Basic : length (distance), area, weight (mass), volume (capacity)
② Living : temperature, time, speed, shoes, clothing, hat, ring
③ Science : pressure, force, work (energy), power, torque, flow, current, voltage, density, viscosity, concentration, astronomy
④ Misc. : angle, data, fuel efficiency, cooking, illuminance, radiation, prefix, binary (ASCII), time zone, blood sugar, AWG, number
※ How to use
1) Select a category (Basic / Living / Science / Misc.)
2) Select one of 4 sections
3) Select an unit by LONGCLICK on the list or click the selector
4) Tap number input box, enter numbers with the keypad
※ Favorites
You can choose 4 favorite sections in Living, Science and Misc. categories.
Toggle checkboxes in the order you want (①-②-③-④).
※ How to open "Torque" section
① go science category
② click the favorites icon on the app bar
③ release one of current 4 favorites
④ check Torque as a favorite
⑤ back to main
⑥ tap Torque section
※ Menu & Settings
① Style : brown (default) / dark brown / black
② Sound effect on/off
③ My country : different unit sets depending on your country.
④ Decimal format
⑤ Accuracy
⑥ Vibration : vibration on/off on keypad
※ How to input fractions
In length and weight sections, this app has [. /] button on the keypad. You can input fractions with it.
ex1) 5 1/4 => [5] + [./] + [1] + [./] + [4]
ex2) 3/8 = 0 3/8 => [./] + [3] + [./] + [8] (Look out!! 3/8 is less than 1.)
or [3] + [./] [./] + [8]
※ How to input "ft and inch" at the same time
Select "ft in" unit. For various inputs, you can use fractions. "lb oz" are the same.
※ Data storage / flow ?
The app shows data storage and data flow in data section so as to save a tab. It is not a mistake. Similarly, it shows speed and running face units in speed section, too. By the way, do you know the difference of "kb", "kB", "kib", "kiB", "kbps"?
b : bit
B : byte
k : kilo (1000)
Ki : kibi (1024)
M : mega (1000 x 1000)
Mi : mebi (1024 x 1024)
kbps : kilo bit per second
※ Landscape mode
It supports landscape mode for tablet PCs. Select more menu (3 dots) at the top-right corner.
※FAQ
Q. How to copy the number to clipboard?
A. Double-tap on the number (since v2.4.2)
Q. How can I convert from gram to litre?
A. "gram" is weight unit, "litre" is volume unit. They cannot be converted. 1L of water = 1kg, 1L of gasoline = ~0.70kg
Q. Where is "A(amp)" unit?
A. Click the favorite icon (star) in Science category. Select [Current] checkbox.
Q. "kg" is not weight unit, but mass unit.
A. I know. weight = mass x Gravity. "mass" and "weight" are same in earth.
Above all, "weight" is a friendly word and the public do not understand "mass" perfectly.
※What's new
- v2.5 : UI update
- v2.4.10: OS 9.0 and Galaxy S10 support
- v2.4.6 : More units by country
- v2.4.3 : Custom currency and Favorites update
- v2.4.2 : Copy to clipboard
- v2.4.1 : Number, my country
- v2.4.0 : OS 4.0+, black style
- v2.3.9 : Dark brown style
- v2.3.7 : Ring, Number
- v2.3.6 : ft inch
- v2.3.4 : Concentration
- v2.3.3 : Shoes, Chothing, Hat in Living category
- v2.3 : Material design
- v2.2 : Favorites
- v2.0 : Unit Converter Pro released (Dec. 2013)
If you have any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thank you.
Hi. I'm Android Boy, the chief developer of Smart Tools co,.
Speed Gun (Smart Speed) can measure the speed of a moving object by touching screen. There were several speed apps in the market, that are designed only for baseball and hackey speed. This app is not a toy, but a tool.
※ Introduction video
※ How to use
1) To measure speed, input the shortest distance to a target.
2) Touch your screen following the target.
※ How to calibrate it
If the measured speed is faster or slower than actual speed, you can calibrate it with [Speed Calibration] at the settings. 25-400% is a selectable range.
In other words, when the app shows 50km/h even if actual speed is 75km/h, set the calibrateion to 150%.
※ Pro version additional features:
1) No ads
2) Smart distance is integrated
①Distance by height / ②Distance by width
