Vibration Meter (v1.6) manual

Hello. I'm the chief developer of Smart tools co.,

Vibration Meter is in the 4th set of Smart Tools collection. It uses your acceleration sensor to measure vibrations or Earthquakes, and shows a reference.
The result is related to Modified Mercalli Intensity scale (MMI). Most embedded acceleration sensors are very unstable. Just use this app as an auxiliary tool.


※ Introduction video



※ Effects 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


※ Features

 ① Alarm sound on / off : you can specify the level at the settings
 ② Reset : otherwise you can tap the paper for sound effect reduction
 ③ Line-chart / Reference toggle

 ④ Brightness toggle : to save battery, make the screen dim.
 ⑤ Play / Pause


※ Menu

※ How to calibrate

Most acceleration sensors are weakened easily, so that calibration is required once a year.

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 for your unnecessary values when there is no movement (Zero-point correction).
④ Click [Cut Baseline] button and select an number.

⑤ Repeat ②-④ several times.


※ FAQ
Q. Can the app alert Earthquake?
A. It is possible but I don't recommend it. Within 2-3 days, your device will be heated and the sensor will be damaged.

Q. Though my phone did not move, the app showed 2-3.
A. Most sensors show meaningless data. Please cut off unnecessary value with [cut baseline] option.

Q. How to save the data?

A. It is free version. How about getting pro version? It can export 24 hour data to a CSV file.

Q. What is the unit of vibration?
A. It has no unit, just the scale for reference.

※ Pro version added features
 1) Sound meter is integrated
 2) Screen capture
 3) Statistic menu (chart saving, CSV exporting)
 4) No ads
 


※ What's New?
 - v1.6.10 : Support for OS 11

 - v1.6 : Line-chart, Sound effect add
 - v1.5.4 : Alarm on/off icon on app bar
 - v1.5.0 : Sound effect
 - v1.5 : Material design
 - v1.4 : Actionbar, alarm level added
 - v1.3 : 12+ languages support
 - v1.1 : Calibrate menu with cut baseline
 - v1.0 : Vibration Meter released (Nov, 2010)
https://play.google.com/store/apps/details?id=kr.sira.vibration

If you have any idea to improve the app, feel free to contact me at androidboy1@gmail.com. Thank you.

Smart Protractor (ver 1.6) manual

Hello. I'm Android Boy.

After releasing [Smart Ruler] for length measurement, I had to develop an app for angle measurement. This app has 3 protractor modes below (touch, plumb, camera).


※ Introduction video



Ⅰ. Touch mode

Ⅱ. Plumb mode

Ⅲ. Camera mode

※ How to lock the plumb?
In plumb and camera mode, touch anywhere on the screen. The red "Holding..." text will blink.


※ Menu & Settings

※ Orientation sensor ??
Most protractor apps are using only an acceleration sensor. But this way has restriction. When the slop is bigger than 60 degrees, the result can be inaccurate.

I tried to find a good solution with an orientation sensor!! It calculates tilt using both magnetic sensor and acceleration sensor. The result becomes more reliable. I recommend that you turn on the option [Orientation sensor] if possible.

Several custom ROM and devices without a compass sensor cannot activate orientation sensor. Please check the specifications and turn off this option.

※ Pro version additional features:
 1) 6 tools (ruler, level, thread) are integrated
 2) More Tilt units
 3) More languages supported
 4) No ads



※ What's new
 - v1.6.3 : Support for OS 16

 - v1.0 : Smart Protractor released (Sep, 2010)

https://play.google.com/store/apps/details?id=kr.sira.protractor

If you have any idea to improve the app, feel free to contact me at androidboy1@gmail.com. Thank you.

Smart Protractor (v1.6) 각도기 사용설명서

안녕하세요. 본 각도기앱이 많은 국내 사자들에게 사랑받고 있어 한국어 설명서를 따로 작성합니다.

길이측정을 위한 Smart Ruler를 출시하고, 각도측정에는 수평계냐 각도기냐 고민하다가 일단 각도기를 개발했습니다. 각도기 앱에서는 3가지 모드를 지원합니다 (터치, 무게추, 카메라).

※ Introduction video



Ⅰ. 터치 모드

Ⅱ. 무게추 모드

Ⅲ. 카메라 모드

※ 무게추를 고정하려면
측정중 화면 아무곳이나 누르고 있으면 "Holding..." 메시지가 깜박이면서 각도가 고정됩니다.


※ 메뉴 및 설정

※ 방위센서가 왜 필요한가 ??
대부분의 각도기앱은 가속도센서만 사용합니다. 그런데 이 센서에는 한계가 있습니다. 경사가 60도보다 크면 측정값이 매우 부정확해 집니다. 즉, 0도를 맞추는데는 좋지만 기울기 측정에 불리합니다.

이 앱에서는 방위센서 옵션을 추가해서, 나침반센서를 같이 사용하는 방식으로 해결했습니다. 이 옵션은 가능한 켜 놓기를 추천합니다. 혹시 추가 움직이지 않거나, 자연스럽게 않다면 이 옵션을 꺼 보세요.

※ 프로버전에 추가된 기능
 1) 6개의 도구 (눈금자, 3개의 각도기, 쓰레드)가 통합
 2) 기울기 단위 추가
  3) 광고 없음



※ 새로운 기능
 - v1.6 : 안드로이드 16 지원

 - v1.0 : 각도기 출시 (2010년 9월)

https://play.google.com/store/apps/details?id=kr.sira.protractor

앱에 관련된 아이디어가 있으면 언제든지 이메일을 보내주세요. androidboy1@gmail.com 

감사합니다.

Smart Level (v1.3) manual

Hello. I'm android boy, the chief developer of Smart Tools co.,

Although a level is a basic tool, I hadn’t considered releasing one for a long time. That’s because I had already released a protractor app with similar features.

It wasn’t until five years later that I received feedback pointing out that when users want to level a picture frame, they search for a “level,” not a “protractor”—so I rushed to release it. 

※ Introduction video



※ Main features
 1) Surface level
 2) Vertical spirit level
 3) Horizontal spirit level
 4) Zero calibration

 5) Reset calibration
 6) Alarm sound on/off

※ Tile units
 ① Degree (˚)
 ② Percent (％)
 ③ Radian (rad)
 ④ Roof pitch : for US carpenters, 5½/12"


※ Menu & Settings
 - Tilt Units, Sound effect, Alarm

 - Text size, Text Color, Background color, Ball color

 - Show calibration, Orientation sensor

※ How to lock / hold

Tap anywhere on the screen. The "Holding..." message will blink.

※ Alarm on/off
Go to Settings and turn on the [Alarm] option. A speaker icon will appear at the top of the home screen. You can use this to turn the sound on or off.


※ Orientation sensor ??
Most level apps rely solely on the accelerometer. However, this sensor has its limitations. If the incline exceeds 60 degrees, the readings become highly inaccurate. In other words, while it’s great for leveling, it’s not ideal for measuring slopes like those found on inclines.

This level app uses the compass sensor to provide a solution. By adding the compass sensor, slope measurements become very accurate. We recommend keeping this option turned on. If your device lacks a compass sensor or the ball does not move smoothly, please turn this option off.


※ FAQ

Q. The surface level isn't working.
A. There is a problem with one of your sensors. First, turn off [Orientation sensor] option at the settings.

Q. I cannot calibrate the level with zero-calibration.
A. Click the reset icon (the circular arrow) at the top. You can reset all settings. Go menu > Reset settings.

※ Pro version additional features:
 1) I includes 6 tools (ruler, 3 protractors and thread).
 2) No ads
 


※ What's new
 - v1.3.0 : Support for OS 16

 - v1.0 : Released (Jul, 2015)
https://play.google.com/store/apps/details?id=kr.sira.level

If you have any idea to improve the app, feel free to contact me at androidboy1@gmail.com. Thank you.

Smart Level (v1.3) 수평계 사용설명서

안녕하세요. 본 수평계앱이 많은 국내 사용자들에게 사랑받고 있어 한국어 설명서를 따로 작성합니다.

수평계은 기본적인 도구이지만, 오랫동안 출시를 고려하지 않았습니다. 이미 기능이 유시한 각도기앱을 출시했기 때문이조. 5년이 지나서야 액자의 수평을 맞출때 [수평계]를 검색하지, 절대 [각도기]를 검색하진 않는다는 충고를 들었고, 급히 출시했습니다. 괜히 고집을 피웠네요 T..T

※ 소개영상

※ 주요기능
 1) 평면
 2) 세로방향
 3) 가로방향
 4) 영점보정

 5) 보정값 리셋
 6) 알람음 켜고 끄기

※ 기울기 단위
 ① 도(˚)
 ② 퍼센트(％)
 ③ 라디안(rad)
 ④ 지붕 경사 : 1/12"


※ 메뉴 및 설정
 - 기울기단위, 효과음, 알람

 - 글자크기, 글자색, 배경색, 공 색깔

 - 영점보정 버튼보기, 방위센서, 이용약관

※ 화면을 고정하려면
측정중 화면 아무곳이나 누르고 있으면 "Holding..." 메시지가 깜박이면서 각도가 고정됩니다.


※ 알람 아이콘 상단에 보이기
설정에서 [알람]옵션을 켜세요. 메인화면 상단에 스피커 아이콘이 나타납니다. 이것으로 소리를 켜거나 끌수 있습니다.

※ 방위센서가 왜 필요한가 ??
대부분의 수평계앱은 가속도센서만 사용합니다. 그런데 이 센서에는 한계가 있습니다. 경사가 60도보다 크면 측정값이 매우 부정확해 집니다. 즉, 0도를 맞추는데는 좋지만 기울기 측정에는 불리합니다.

이 앱에서는 방위센서 옵션을 추가해서, 나침반센서를 같이 사용하는 방식으로 해결했습니다. 이 옵션은 가능한 켜 놓기를 추천합니다. 혹시 구슬이 움직이지 않거나, 자연스럽게 움직이지 않는다면 이 옵션을 꺼 주세요.

※ 자주하는 질문

Q. 수평계가 움직이지 않아요.
A. 일부 센서에 문제가 있습니다. 먼저 설정에서 [방위센서]를 꺼 보세요.

Q. 영점보정으로 초기화할 수 없습니다.
A. 보정을 반복하면 보정이 안될 수 있습니다. 상단에서 리셋버튼(둥근화살표)를 클릭하세요. 그래도 안되는 경우라면, 메뉴에서 [설정초기화]를 하면 앱을 최초상태로 돌리세요.

※ 프로 버전에 추가된 기능
 1) 6개의 도구 (눈금자, 3개의 각도기, 쓰레드)가 통합
 2) 광고 없음
 


※ 새로운 기능
 - v1.3.0 : 안드로이드 16 지원

 - v1.0 : 수평계 출시 (2015년 7월)
https://play.google.com/store/apps/details?id=kr.sira.level

앱에 관련된 아이디어가 있으면 언제든지 이메일을 보내주세요. androidboy1@gmail.com 

감사합니다.

Battery Meter (v1.0)

 Hello. I'm android boy, the chief developer of Smart Tools co.,

Recently, there has been a growing interest in batteries. Do you want to check the condition of your smartphone battery in real time?

The latest smartphones have a settings menu that displays various battery information. However, this isn't enough, and some devices only provide brief information. I thought I could do better, so I released this app. :)

※ Introduction video



※ Battery information

- Level, Status, Remaining time

- Voltage, Ampere, Temperature

- Health, Capacity, Power

- Type, Model, Version

※ Pending update
- Battery usage per app

- Daily charts

- Styles in various colors


※ What's new

 - v1.0 : Released (Sep, 2025)
https://play.google.com/store/apps/details?id=kr.sira.battery

If you have any idea to improve the app, feel free to contact me at androidboy1@gmail.com. Thank you.

Smart Measure (v1.8) manual

Hello. I'm Android boy, the chief developer of Smart Tools co,.

Do you know the height of the Statue of Liberty or Tour Eiffel? How do you know them? Maybe by Googling? Now I'll introduce a new rangefinder app.

Though this photos are manipulated, the app can measure them.


※ Introduction video



※ Theory of trigonometry
I had heard that some math teachers taught this theory to elementary school students.

※ Checklist Diagram
① Stand up!! Don't sit or lie down.

② Firstly, input phone's height and building height.
   Phone's height ≒ your height - 0.3m (1ft), default = 1.5m (4.9ft)
   It means the length from ground to camera lens.

③ Calibrate your device. You can make it accurate (~95% accuracy).

④ The result is not perfect, just for reference.

(click to enlarge)

< Russian >

< Spanish >

< Japanese >

※ Manual Calibration
There are 10,000+ android devices in the world. They would show different measurements because of various sensor parts. Therefore, I strongly recommend to calibrate your device with known distance.

If the result is longer than actual distance, reduce by 5% at manual calibration. If shorter, increase by 5%.

※ Calibrate Menu
The app supports auto-calibration menu, too.

After placing the back side of your device against the wall completely, click [Calibrate] button. Do it several times. The menu will find your best calibration.


※ Menu

① Menu
② Manual calibration
③ Height input : it will hide into sub menu.
④ Screen capture


※ Bubble level
The app has a green bubble level for accurate measurement. You can run zero-calibration by longclick. If your device is a tablet and the bubble is at the right edge, sensor settings is wrong. Please let me know model number.

※ FAQ
Q. It would not work.

A. Does your device have a magnetic sensor (magnetometer) ?

Q. The result is not correct.
A. Please calibrate your device carefully and enter your height (from ground to device).

A. The distance is always "MAX".
Q. Your phone is aiming above the horizon. Please see checklist diagram.

Q. How long can it measure? Effective distance?
A. Normally 1-40m. When you are on a structure, you can measure more.

Q. I want to enter 4 ft 5 in as phone's height.
A. The app supports only decimal. Enter 4.4 ft.

Q. Please add "cm" or "inch" units.
A. The result is not perfect, at least 3-5% off. Smaller units are not efficient.

Q. The height button does not appear.

A. After measuring the distance of a target, the app activates height function.

※ Pro version added features
 1) Measurement of the Width and the Area
 2) Camera Zoom
 3) Portrait mode
 4) No ads
 

※ User's gallery

- For hunting with archery bow

※ What's new
 - v1.8.0 : Support for OS 15

 - v1.7.0 : Support for Android OS 10

 - v1.6.8 : OS 4.0+
 - v1.6.0 : Material design
 - v1.6 : Screen capture
 - v1.5 : Action Bar
 - v1.4 : 10+ languages support
 - v1.3 : New icon, tablets support
 - v1.2 : App2SD
 - v1.0 : Smart Measure released (Nov, 2010)
https://play.google.com/store/apps/details?id=kr.sira.measure

If you have any idea to improve the app, feel free to contact me at androidboy1@gmail.com. Thank you.

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The ideas to measure the distance had an International Patents. (Jul, 2010)
Copyright ⓒ 2010-2025 Smart Tools co., All Rights Reserved.
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