Fit App

Version 3.1.0

April 29, 2025

Release Date: April 30, 2025

App Updates - 3.1.0

  • New Features:

    • Ability to Archive a Client.

    • Ability to Delete a Client.

    • Ability to update a Client’s email.

    • Ability to manually change a channel in the hardware settings section of the app.

    • App now communicates when Pedal Spindle is successfully captured

  • Bug Fixes:

    • Bugs related to Pedal Spindle Offset - the ability to successfully capture Pedal Spindle more easily.

  • Change Channel Ability to Hardware Settings

    • If your VCB shows an Unknown Channel, you can now manually change the channel through hardware settings.

**TO UPDATE: open the App Store on your iPad, click on your account icon in the top right, look for the update shown in the app list (may need to refresh for the update to appear)

Translated Versions found here:



Current Known Issues

These are the issues our team is aware of, and we are working on getting a fix out as soon as possible!

  • Hardware times out after no activity

    • Sacral Sensor (AnGi) goes to sleep quickly.

      • The app cannot wake up the AnGi on its own. When you are ready to conduct a pose capture, tap or shape the device to wake it up. You will know it is awake once you see the green light flashing.

      • Make sure you have removed the thin plastic slip so the battery makes contact with the device.

    • Zin Wand

      • If the Zin Wand is not used after connecting to the app after a long period of time, the tool will disconnect.

  • The Fit App does not auto-level the bike during the Zin Module.

  • Issue when loading Pose Capture into the “Rider View”

    • When in Pose captures under the ”Rider” view and you go to load the right side the capture will always display double or with a high degree of error.

      • One work around that some fitters have found success with is to unload the capture and reload it.

  • Zin data captured during the fit does not make it into the rider’s report. 

    • This is occurring for TT/Tri Bike Types and MTB XC

  • Values in the spreadsheet flicker with different values

  • Zin Data - Last Client Data Loading

    • We are aware that some users are experiencing an issue in the Zin Module. Users are reporting that when loading “Initial” and “Latest” Zin, data from the last fit client is loading rather than data from the current client.

    • If you experience this issue, pause your fit and then return to the fit. This should load the correct client data.

    • If you are experiencing this issue or if this workaround does not work for you please let us know via the feedback button.

  • Unable to Generate Personalized Ranges

    • Even after completing Dynamic Movements Steps, the app is unable to generate personalized ranges.

  • Client Creation: Date of Birth 

    • When you are entering the birth date for a new client, start with the birth year and then you can update the month and date. 

Additional Tips and Tricks

  • Updates: Email App

    • Some fitters have reported that when they try to email a rider their fit report the email does not send from the iPad. Here are some tips to help with this:

      • Log out of the mail app and log back in.

    • We do not recommend using your personal email on the iPad being used for fits. This will avoid accidentally sending a fit report from your personal email and avoid other shop employees from seeing your personal emails.

    • In order to email your client a fit report, you will need to make sure the Email App on the iPad is set up. Please view the following PDF for email setup instructions.

    • iPad Email Setup PDF

  • Fitter or Shop Information Updates

    • If you need to:

      • Update your name, please make this update on your Specialized.com account

      • Update information about your shop? Contact your shop rep to help update this information.

      • Update your shop logo, please use this forum on Retul.com: RETÜL

  • Have a question about how to us the new Retül Fit app? Check out the new education videos from Specialized University: Retül Fit V8 for iOS - YouTube

  • Channel Issues

    • Experiencing channel issues? We recommend going thought the Hardware Onboarding process to make sure all of your hardware is on the same channel.

    • You can find this in your app settings under the HELP section. Just click on “Show Hardware Onboarding”.

  • General Recommendations: Troubleshooting 

    • If you are experiencing any issue with the app, please do not uninstall and reinstall the app until you have received instructions from the Retül Team.   

    • Doing this on your own will make it difficult for the team to diagnosis your issue. 

    • When you uninstall and reinstall the app, it will delete app settings, measurements groups, and any profile settings you have set up. 

  • Cloud Icon 

    • If you are experiencing the following issues, tap the Cloud Icon: 

      • Your shop is not showing up after you log in. 

      • You are unable to see client files.