Fit App

Version 4.0.0

April 15, 2026

Release Date: April 16, 2026 - 9am PST

After updating your app, you may be logged out of your account. Please confirm you are logging back in with the correct email address before reporting any issues logging in.

App Updates - 4.0.0

This release focuses on foundational improvements to performance, stability, and scalability, setting the stage for continued growth and future feature development.

  • Performance & Stability Enhancements

    • Improved data loading speeds for accounts with a large volume of fit and session data

    • A new underlying foundation to ensure the app runs smoothly and consistently

  • Offline Experience Improvements

    • Enhanced handling of offline use cases, improving reliability when connectivity is limited or unavailable

  • Accuracy & Data Fixes

    • Increased range for zin technique with varying saddle contours from nose to back of saddle.

  • Scalability & Future Growth

    • Architectural updates that allow the app to scale more effectively, supporting additional users and enabling future feature expansion

  • New Feature

    • In-app calibration diagnostic tool. This is a tool that is meant to be used when troubleshooting with our technical support team.  

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

    If you experience a crash in the Fit App, an option to send the crash details to the developer will be available. Please send the crash details. This helps our team quick diagnose and resolve issues.

    • Personalized ranges are activated when the fitter completes all the Assessment questions. If you have completed the Dynamic Movement but left some of the assessment steps blank, Personalized Ranges will not populate - fitters will see the yellow triangle alerting them to an issue.

    • After Zinning a bike in the app, if you feel that the bike hasn’t been auto-leveled by the app, re-zin the wheels and trace as much as possible. This applies to all bike types except when using the MUVE SL.

    • Pedal Spindle Offset

      • We are aware that users are continuing to experience issues with the Pedal Spindle Offset feature in the Fit App.

    • 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.

    • 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.

    • 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. 

    • Users are experiencing a Zin disconnect during their fit sessions

      • Solution:

        1. In the top-right corner of the App, tap the Vantage icon.

        2. Tap the pair option from the drop-down

        3. Wait a few seconds while observing the blue light on the Zin

        4. When the blue light starts flashing, the connection has been re-established

    • 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: Fitter Database Form

    • 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. ption text goes here