Why can't I connect MyFitnessPal?

MyFitnessPal connects with your MFP username and a diary key, not your email or account password.

MyFitnessPal connects with your MFP username and a diary key, not your email or account password.

1

Find your actual username under Settings > Profile in the MFP app (or in the diary URL myfitnesspal.com/food/diary/USERNAME).

2

Under Settings > Diary Settings > Diary Sharing, set Diary Sharing to Locked with a Key (not Public or private).

3

Use that key (it is separate from your password).

4

Reconnect with the username and diary key.

The web settings page is the source of truth, since enabling it on mobile may not sync.

The diary-key field clears on error. If your credentials are correct, the error can also be transient, so retry a few times before escalating.