Smart Ruler Pro is the 1st set of Smart Tools suite. It is a collection of the 6 tools below.
① Ruler
②-① Touch Protractor
②-② Plumb Protractor
②-② Camera Protractor
③ Surface Level
④ Thread Pitch guage
① Ruler : for Length, by touch
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-P7bu40rx6DYrLL_tpeFriBpq-wEJJpV2Fn13dVSDxrrSZ_PT3Sl3RTm0Jmm88S4XnHibvVpP7NeNcvN6Inlm1IqbBxJwjK85vAbIdCYn3diCVp6NF0Wv-1EsG1mGXAr7jUplKXrxWC5F/s320/ruler2_pro_blog.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEskRDi0yOSlAZlB4e-zHvufw41JDGy6Rqi3QsxaU5uIAnNmeQP9mFWW-nfCw6Dtgmid10DEvRXk388qYrElYRVtg00kVXRpy0GBl_W96zCzFJ_avpWgk3LmfcFd-6cefxcl2kydJZa-fP/s200/actionbar_pro.png)
②-① ProtractorⅠ : for Angle, by touch
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5ieVVzuAYYrE4MX60obw8EAAFAaJdyks0sLk1QfCSyppfUsNxK_8ntHUyVlcyoLf592L9Yw5h1DdUZFfIQ_Lu4LPyqleDm6oRnMv6W_EYlg3sr9iMxCYzXwOSgY-dGYpdOhlQGUODOC6f/s320/protractor1_pro_blog.png)
: show the actionbar
②-② ProtractorⅡ : for slope, by plumb
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjD0dca7driM-1T7xeGoXepk3vNFQIkYhq0NVaXnadVlBUt7PsUNk5E2X4qyuYm4nS_Sp3fPaanVPTRCcBcdaGfMUB5D57EACRO80TBjmXMi3bQJ6vcOVwo7nA4bssrG4bbPrBCZrJhYTsr/s320/protractor2_pro_blog.png)
: zero calibration, click to set to zero degree.
②-③ ProtractorⅢ : for tilt, by camera
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYqR-kC3MYE0utK3ITdDLy-3G2bHTWlsdikCZ6ruTPGyvOfdTjFREBHuR7kjwSHZKDF03XsH1x_F9QXHxnfZ1zmBiu_L7-fYCw155w6zeV9BTjhggEP6OIZVUgJIqJRkd4ndJ5Lv5sKrvt/s320/protractor3_pro_blog.png)
: Black/White : change the line and text color
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5ieVVzuAYYrE4MX60obw8EAAFAaJdyks0sLk1QfCSyppfUsNxK_8ntHUyVlcyoLf592L9Yw5h1DdUZFfIQ_Lu4LPyqleDm6oRnMv6W_EYlg3sr9iMxCYzXwOSgY-dGYpdOhlQGUODOC6f/s320/protractor1_pro_blog.png)
: show the actionbar
②-② ProtractorⅡ : for slope, by plumb
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjD0dca7driM-1T7xeGoXepk3vNFQIkYhq0NVaXnadVlBUt7PsUNk5E2X4qyuYm4nS_Sp3fPaanVPTRCcBcdaGfMUB5D57EACRO80TBjmXMi3bQJ6vcOVwo7nA4bssrG4bbPrBCZrJhYTsr/s320/protractor2_pro_blog.png)
: zero calibration, click to set to zero degree.
②-③ ProtractorⅢ : for tilt, by camera
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYqR-kC3MYE0utK3ITdDLy-3G2bHTWlsdikCZ6ruTPGyvOfdTjFREBHuR7kjwSHZKDF03XsH1x_F9QXHxnfZ1zmBiu_L7-fYCw155w6zeV9BTjhggEP6OIZVUgJIqJRkd4ndJ5Lv5sKrvt/s320/protractor3_pro_blog.png)
: Black/White : change the line and text color
③ Surface Level : for horizon, by bubble
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCK-eCUeARJj3_YKfgdnFH1SjwpThHULbqPHWN3kqav2EQ6CoFrz27c_dmj3I19nn49SN6JPaGOiqdj5XrnZp9ZXW-kEwnTJg2cF0X3aHtOJDN0_cT0EaLwVY-uLDOaOVITZginxRdjGlV/s320/level1_pro_en.png)
- Turn on/off the [Horizontal Bar] at the settings.
④ Thread Pitch gauge : metric, US, NPT, BSPT
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiVg0PGNY1xhk3rKFQ7ewJ5qXH8YkrtTU5LSaIPzA9uMZMe62g59WCoZymTs6gwKN0Kvme9pcUEe_x04BE35zvyvvzn6aHs0iik8xkbxLjpEEGmP6b37-J8VlPjf65miLEThnMd4Qi3eG0A/s320/thread1_pro_en.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAYq77SOm0LJMMAZhZikOA1F_45p0_T5ei4yrpU3nRPPGAhU9OnU6oYM9tqAEM93J6KGBVVWeAH-XiHduOiWGUKcqGgrzCyri2TzzZE4ggeJ7zJp172ZieV_nNKo5QOK_ob9SCWAjKad_c/s320/thread4_pro_en.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgh1eLI8hVRFIsLos7BfDKBwwED7O1cPlRonwXBTzAMHUyBdmH9E6ZN6r-EbpW4orwIhbRkOfchoxhXN7JxZxT3TIP25XYVUOCrMYDKJkotF9oniwFs-K1GEZcpioTg1JPTE5rJDyE88Gmx/s320/thread_portrait.png)
: portrait mode
* Sliding drawer
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj48oZkS1eBkEzk_2Z_ooCG88xfmwWdsOKfxKAlV9Oy_RCEfgsx3ZE-k7nbSka-3cmJ6VvlaYIkbNeHUFT6xtYprCzXNosMWdAark_H28ATylYkf-zDYAlvkcBQE_NQBN2S6HNu_xqb5zGt/s320/pro_en.png)
: select one of the tools
* Menu and Setttings
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwPhE3M3X1mzIcyOF0m1xoqlHkiMZrPK50T-dlNxLxc0iCc1Bq_VnMV39TWN9K3bHeUoyB1XjOeaEB2XBaTphjPp_vj8MDQGMN9j_F2nVaNzEUSl5QhYPDQUKWA8Qu8hT0DwlmSERae05_/s200/ruler_menu.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCz12gSYAmgKUCruaBrrFMidO3tUXjNU-z4op_tQTKMlcQlRtVdsZUfkcnfCpj1LcSOmmkhcc476_PaUcY3FvQ5xT7QQkiK79WlBRQgebRZeONRLzOtOKZzwqNjdLczDHOmTQRHZMR1sBQ/s640/ruler_settings.png)
* Introduction video
* Caliper mode
multi-touch (touch the screen with 2 fingers).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgALa2iTSQPNwhsoYhYesnyXKoX7My2uuRPnYheTPAbYFR0v0OtgnW6A2028R9s9o8Gy7YB7Ki1byxMqJJlv88Cbq93I0nGMf5twWognaVVau_dq4vr2yI7g9SvENLyZqCzFwyEIA3xiuaT/s320/caliper.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTRDw5ViIyR9iBjmaMm-wEo2Erj6YyspxItKHXHdDOEYhbT8S28dG5HcEBnRyLEQ2eDwGZn2Oqe-WuIcZYzvGrYRiLZlwWplXKm3jeGcQR7JHcr6Ew7FMBnwflB0PVBlxMQYtPBBbHKHYL/s320/ruler_caliper.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7KmBoq93ywG1MGWOC04SF3a7an67NNqFXkkBnVmPWrq5ckxQDm2n3VtpV51RJ0VEWF9hVGZvaXuK1nGmiuj9KBKFKcOkNS6TXrTm8J_T5YyD6gpcoU0JR9XSyZsp4trnIzRfXDHycSJS8/s320/thread5_pro_en.png)
* Scale for maps and Drawings
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnyEQ15-EtfbBqEy9G59ll5cJrb10n5fH04p5RyWr4geiy1AJTqKmUsBo9UPl68FkzNq2fuvnXvHgrIKN2M5p54bADZpiHgcTO3HkiZT9M3MpXN5qpJYTL5RWUh7EFAE70Z22oNt66REXP/s200/scales.png)
input the [scale] at the settings.
* FAQ
Q. The screen width is not correct.
A. Click [input width] icon in the actionbar. You can input your correct width.
Q. The surface level does not work.
A. Several OS2.3 and custom ROM had this issue. Turn on [auto-rotate screen] option on your phone.
Q. I cannot recalibrate the level.
A. You have to initialize all settings. Go menu > init settings.
- v2.5.1 : Thread Pitch update (portrait).
- v2.5.0 : ActionBar added.
- v2.4.5 : Caliper mode updated.
- v2.4.3 : Nexus 7 support.
- v2.4.2 : Black background color.
- v2.4.1 : SGS3, Galaxy Note calibrated.
- v2.4.0 : Thread pitch gauge update.
- v2.3.1 : 10 langauges are supported
- v2.3.0 : thread pitch gauge added.
- v2.2.0 : background colors
- v2.1.4 : scrolling method for long length.
- v2.1.3 : trackball, galaxyTab supported
- v2.1.1 : protractor multi-touch
- v2.1.0 : scale, caliper mode added
- v2.0.0 : released (Oct. 2010)
If there is any idea to improve it, feel free to contact me. androidboy1@gmail.com
Thanks.