OTTO Tuning System

OTTO Tuning System

By OTTO DesignWorks

  • Category: Sports
  • Release Date: 2015-05-30
  • Current Version: 2.2.6
  • Adult Rating: 17+
  • File Size: 149.57 MB
  • Developer: OTTO DesignWorks
  • Compatibility: Requires iOS 8.1 or later.


The OTTO Tuning System is a vision App and hardware kit that enables you to conveniently check and adjust your bicycle with professional precision. This App requires the purchase of OTTO Gauges from OTTO DesignWorks or an authorized dealer. The OTTO App offers progressive levels of adjustment with both CHECK and TUNE functionality. CHECK allows cyclists to confirm the accuracy of their bike's shifting and whether additional adjustments are needed. TUNE gives cyclists the option of a simple barrel nut-only adjustment or complete tune, which includes adjustments to the high and low limit screws, and cable tension. The OTTO App also provides multiple bike profile capability. Features & Benefits of the OTTO Tuning System: ● Convenient - Do-It-Yourself. Make adjustments on your schedule. ● Easy to Use - Interactive screen graphics and clear audio instructions. ● Fast - CHECK confirms your tune quality in under 30 seconds. ● Complete - TUNE provides barrel nut adjustments in under a minute and complete limit screw verification and adjustment in less than 10 minutes. *requires In-App purchase* ● Precise - Ensures shifting accuracy to +/- 0.125 mm (0.005 inches), less than 1/8 barrel nut turn.



  • Awful waste of time and money

    By Strokerace82
    Taking bike to the bike shop on Monday to beg they fit it in after app tutorial left my gearing in an awful mess. Took an hour of awkward photos and back and forth instructions for the app to decide the tension wasn't right in the first place . The check may work but don't go near the full tune. Consider this the warning I wish I was given. gave big thumbs up but this was real world experience with ultegra 6800 11 speed.
  • Average at best

    By TheKempish
    The best I can say about this app and the associated tuning kit is that it gives a rough tune. If you're hopeless at rear mech tuning you may get some use from it but be prepared to have to fine tune the barrel adjuster yourself to get it spot on. Like the previous reviewer I've used the app 3 or 4 times in succession to get an approximate tune, having to restart the process several times since it keeps asking need to do dense things like 'turn the barrel adjuster 27 clicks clockwise' when it's only just asked me to turn it 16 clicks anti-clockwise… I dislike the subscription model too. I paid £36 for the tuning kit only to then need to pay a further £25 a year to be able to use the app is, without the app it's nothing more than scrap plastic. I'm only using it now because I've already parted with the cash. If I could get a refund from Otto I would. My suggestion: pay for a mechanic to show you how to do it properly yourself.
  • Totally useless if not worse

    By Corner Office
    Do not be tempted, I have spent hours and hours trying to tune my gears and this app DOES NOT WORK