Support
NBK Fit is made by one person. Email and you will get a reply from that person rather than a ticketing system.
Getting the app
NBK Fit is in private testing through Apple's TestFlight. Email the address above and you will get an invite link. It needs an iPhone running iOS 17 or later.
Nothing is arriving from Apple Health
Open More, then Apple Health, then Review permissions and check the categories are switched on. iOS only offers toggles for data the app has asked for, so if something is missing there, reopening that screen will prompt for it.
If a category is on but empty, whichever app records it is not sharing with Apple Health yet. That switch lives in that app, not in NBK Fit.
A number looks wrong
Tap the number on Today. You will see every contribution and where it came from. Anything Apple Health supplied can be corrected with Fix, and your correction always wins from then on. Anything you added by hand can be removed outright.
This happens most often when a food or fitness app writes duplicate entries into Apple Health. Correcting it in NBK Fit does not change Apple Health itself.
Deleting your account
More, then Delete account and data. You will be asked to type a confirmation phrase, and you choose whether to keep a 30-day window to change your mind. With that switched off, everything is deleted immediately and cannot be recovered.
Getting your data out
Email and ask. Your history will be sent as a file you can open in a spreadsheet, free, with no conditions attached.