How to Sync MyFitnessPal With Apple Health

Quick Answer

Getting these two apps talking to each other closes a gap that a lot of people run into. MyFitnessPal is built for food logging and macro tracking. Apple Health is built to collect everything else, from steps to sleep to heart rate. Connect them and your calorie budget will start reflecting your actual activity instead of a flat estimate. Generally, the same sync mechanics apply whether you're connecting MyFitnessPal, Garmin Connect or another wearable app.

Setting up the connection

The sync happens through Apple's HealthKit framework, which lets compatible third-party apps read and write data to Apple Health. If you have not connected the apps before, start inside MyFitnessPal.

Steps to sync MyFitnessPal with Apple Health

1. Open MyFitnessPal on your iPhone

2. Tap More

3. Tap Settings

4. Tap Sharing & Privacy

5. Tap HealthKit Sharing

6. Turn on the data categories you want to share

7. Tap Allow

That last point trips people up. Apple only shows the full data type picker the first time you authorise HealthKit Sharing. After that, permission changes live in iOS Settings rather than the app itself.

How to check or change Apple Health permissions after setup

After the first setup, you may not see the same connection screen inside MyFitnessPal. That does not always mean the sync is broken. It usually means the connection has already been initialised and Apple Health permissions now need to be managed through your iPhone.

To check or change permissions:

1. Open the Settings app on your iPhone

2. Tap Health

3. Tap Data Access & Devices

4. Tap MyFitnessPal

5. Turn each permission on or off

Apple also lets you manage app access from the Health app. Open Health, tap your profile, choose Apps or Devices under Privacy, then select the app you want to adjust.

What data actually moves and in which direction

Not everything syncs both ways. This is where most confusion comes from, so it helps to see it laid out plainly.

Why the numbers sometimes don't match

A few things cause the two apps to disagree even after a successful connection:

• Same-day only exercise sync. If you open MyFitnessPal after midnight, yesterday's workout won't come through. That's expected behaviour, not a bug.

• Multiple data sources. If more than one app or device writes to the same category in Apple Health, such as steps from both a watch and a phone, MyFitnessPal may only pull from whichever source Health prioritises. Apple explains how it ranks sources in its guide to managing Health data, with manually entered data ranked first, followed by your iPhone or Apple Watch, then connected apps.

• No historical backfill. MyFitnessPal only pulls data logged after you connect the two apps. It won't reach back and import your workout history from before the link was made.

• Reinstalling the app. If MyFitnessPal is removed and reinstalled while troubleshooting, log back in with the same account, confirm your data has synced back from MyFitnessPal's servers and re-link Apple Health.

Troubleshooting the connection

Start with the simple fixes first.

• Check permissions in iPhone Settings. Go to Settings, then Health, then Data Access & Devices, then MyFitnessPal, and make sure the right categories are turned on. This is the best place to check permissions after the first-time MyFitnessPal setup has already been completed.

• Open both apps. Open MyFitnessPal, then open Apple Health. Sometimes data does not appear until both apps have had a chance to refresh.

• Review Apple Health data sources. In Apple Health, open the category that looks wrong, scroll to Data Sources & Access and check which source is listed first. Apple says you can reorder sources if more than one app or device contributes to that category.

• Avoid multiple MyFitnessPal accounts on one iPhone. MyFitnessPal warns that Apple Health does not distinguish between multiple MyFitnessPal accounts used on the same device. If different people log in and out of the app on one iPhone, data can mix or overwrite.

If a workout still isn't showing up after checking permissions, try logging a small test workout manually in Apple Health. If that syncs to MyFitnessPal within a few minutes, the connection is working and the original issue was likely a one-off.

Frequently Asked Questions (FAQ)

Does MyFitnessPal sync macros to Apple Health?

Yes, sort of. MyFitnessPal sends calories and some nutrients to Apple Health as part of its meal summaries. The company doesn't publish a full list of which nutrients make the trip, but it has confirmed caffeine and vitamin A are excluded.

Can Apple Health send food data into MyFitnessPal?

No. MyFitnessPal says food data does not transfer from Apple Health into MyFitnessPal. Food sync works from MyFitnessPal to Apple Health.

Why are my Apple Watch calories different in MyFitnessPal?

The two apps sometimes calculate active calories differently, and MyFitnessPal may round or adjust workout entries once they're logged. Small discrepancies between the two are normal and shouldn't affect the accuracy of your food log.