Hi there! I understand you're having trouble entering food in the Nutritionix Track app on your iPhone. Let's get this sorted out together.

To start, could you tell me a bit more about the issue? For example:

- When you try to add food, does the app freeze, crash, or just not save your entry?
- Are you entering foods from the database, or trying to add custom foods?
- Have you recently updated the app or your iOS version?
- Does the problem happen every time or just occasionally?

Meanwhile, here are some simple steps you can try that often resolve food entry problems:

1. Close and Restart the App: Swipe up from the bottom of your screen (or double-click home button) to view your apps, then swipe away Nutritionix Track to fully close it. Reopen and try again.

2. Check for App Updates: Go to the App Store and make sure you have the latest version of Nutritionix Track.

3. Check Network Connection: Food entries sometimes require syncing. Make sure you have a stable internet connection.

4. Log Out and Log In: In the app settings, log out of your account and then log back in. This will sometimes refresh your data.

5. Reinstall the App: If none of the above work, uninstall the app and reinstall it from the App Store. (Don’t worry, your data saved on the server should be safe if you’re logged in.)

If you have tried any of these or if you notice any error messages, please let me know. We can then explore further options or possible known issues with the app.

Are you able to try those and let me know what happens?