iPhone Screenshots


※To use this application, it is required to read disclaimers completely and agree to it.

*Easy to use!
You can measure belt tension with your iPhone.No additional devices or complicated calculation are necessary.

*Easy to see!
Belt tension is measured digitally by a sound wave, and numerical outputs are plain to comprehend.

*Easy to apply!
You can choose your language, units of the output and microphone sensitivity depending on the situation.

*And free!
Smart Tension is a free application.
Try out our new App for quick and easy tension measurement!

What’s New

Version 1.3

Add the calibration button to adjust input level automatically for the case of sound pressure level meter scaling out without any signal.

Ratings and Reviews

2.0 out of 5
1 Rating

1 Rating

robert003003 ,

Seems like a good product

Have a RG 80 and was going to check the tension. So like anyone because I didn’t know the specifications to tighten it I read the manual. Download this, okay, select other, okay, select timing belt, okay, select GigaTorque GX, okay, select G14M, okay, select 37, okay, input 22.375 in. Error. Range of 7-21 in. Please correct this please


Mitsuboshi Belting Ltd.
4.4 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating
Rated 4+
© Mitsuboshi Belting Ltd.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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