Retül Fit4.2.4 - App Store

Retül is an inspirational, immersive and modern experience for riders. Our technology is used to collect and analyze data to help retailers and fitters advise riders and help them make the best product decisions to increase comfort, prevent injuries and improve performance.

We've been partnering with Specialized since 2012. Together, we've been able to take Retül technology to new heights, and along the way, we've also elevated the precision of Specialized's Body Geometry products. This relationship has also brought a tremendous opportunity to Retül, as we've been fully integrated with Specialized's pro-level athletes and teams. Now, we can take what we've learned from working with the world's most demanding riders and apply this knowledge directly to riders of all experience levels and motivations.

Based in Boulder, Colorado, we've specialized in bike fitting technology and training since 2007. In that time, we have performed thousands of fits and taught hundreds of training courses around the world. We have helped bike shops, fit studios, performance centers and medical professionals implement Retül technology services into their businesses. Here, we've also been able to work with the most talented team in the industry, employing everything from software development to shipping & receiving. And now, we're situated in a brand new Innovation Center here in Boulder, which allows us to both grow and expand upon exciting new projects and groundbreaking innovations.

Version History Bug fixes. 4.2.4 Oct 2 - Improved cloud connection
- Hide/show client list
- Custom measurement groups saved to the cloud
- Improved offline handling for session photos
- iOS 27 UI updates
- Bug fixes 4.2.3 Sep 30 Bug fix for generating reports 4.2.2 Aug 26 Bug fix for poses in reports 4.2.1 Aug 19 - New Feature! You can now take and mark up images during sessions and add them to your report
- Update to the UI in your shop list to make refreshing easier
- New UI in reports makes building them more intuitive
- Bug fixes 4.2.0 Aug 17 Fitters now have the ability to view and edit bike info after saving.
Zin components entry uses native controls, matching bike and client creation screens.
Bike tracings are now auto-leveled.
Bug fixes in the zin and logout/login areas. 4.1.3 Jul 16 - Reverting PSO to previous functionality
- Saving custom pose groups 4.1.2 May 19 Crash fix, further PSO fixes 4.1.1 May 11 - Bike info and direct email added to client details
- Pull to refresh clients and shops
- PSO reliability improvements
- Bug fixes 4.1.0 May 7 Further bug fixes 4.0.3 Apr 23 Bug fixes 4.0.2 Apr 23 Bug fixes 4.0.1 Apr 18 General Bug Fixes
Network Refactor Updates 4.0.0 Apr 16 Bug fixes for crashes in the Zin module.
Bug fixes related to incorrect zin data populating in the Fit Report. 3.2.8 12/11/2025 - Ability to delete a Pose or Zin File
- Ability to Rename Pose or Zin Files
- Fix for App Crashes Occurring in the Assessment Module
- Ability to assess and diagnosis Zin Connection issues in app
- Fix for issues maintaining a Zin connection 3.2.7 11/12/2025 Bug fix related to Pedal Spindle Offset
Bug fix related to the app not generating a bike summary image in the Zin Module
Bug fix related to rider height not saving when using imperial units 3.2.6 10/08/2025 AnGi Orientation has been corrected
Translation updates (Spanish)
Notes Section Added to Dynamic Movements
Bug Fixes
For more details, please check the Retül Fit Newsletter 3.2.5 10/01/2025 Fix for Zin Images Showing the Wrong Bike Type 3.2.1 09/11/2025 Updates to Pose Ranges for Multiple Bike Types
Zin Module Refactor
Bug Fixes related to App Crashes 3.2.0 08/28/2025 - Rider View Screen Improvements
- New Features Related to Fit Reports
- General Bug Fixes 3.1.5 07/16/2025 - Translation Updates
- New Features Within Client Management
- Bug Fixes Related to Pedal Spindle Offset
- Improvements to Channel Changing 3.1.0 04/30/2025 DSD Pressure Threshold Updates
Bug Fixes:
Create Client Doesn't Auto Select it After Creation
Capitalization Incorrect for Client Name in Session 3.0.11 03/05/2025 Neutral selection in assessments will now show up correctly.
Ability to update client info.
Custom pose groups now persist in the app.
Translation updates for multiple languages.
General bug fixes. 3.0.10 02/11/2025 Bug Fix 3.0.9 01/15/2025 Translation Updates
Bug Fixes 3.0.8 12/19/2024