Hello @JenPh, I saw you are new around, so let me start by giving you a warm welcome. Also I noticed you haven't received a proper answer, so let me step in and ask you how it goes so far? Is the issue still persisting with your iOS?
I saw on your community profile page you have associated a Charge 2, so this is a hint the issue might be resolved, but I'm guessing so in case you need more help try to do the following:
1. Double tap the home button on your iOS device. Your open apps will show on your device's screen.
2. Close the Fitbit app by swiping the app image in an upward motion.
3. Reopen the Fitbit app.
I just want to give follow up with you to see if everything is okay. If you have more questions just let me know!
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