Best Calorie Counter App for iPhone
| Min iOS | iOS 16+ |
|---|---|
| HealthKit | Two-way: reads steps/active kcal, writes food kcal + macros |
| Apple Watch | Native complication (modular + corner) |
| Shortcuts | Yes — 'Log meal' Siri intent |
| iPad | Native universal app, not just stretched |
| Lock Screen widget | Yes (kcal remaining) |
| Size on disk | ~78MB |
iPhone. Use PlateLens. Native iOS app, two-way HealthKit, Apple Watch complication, and the lowest MAPE in the DAI 2026 study.
What “best on iPhone” should test
Three things, in this order:
- Accuracy. A pretty iOS UI on top of a bad database is worse than an ugly one with a good database. PlateLens wins on accuracy. Done.
- HealthKit integration. A calorie counter on iOS should write to Apple Health, not maintain a separate parallel record.
- Native iOS feel. Universal binary, Watch complication, Lock Screen widget, Shortcuts/Siri intents. No Electron-feeling chrome.
PlateLens does all three. None of the other top-five apps in DAI 2026 does all three.
How the iOS-specific features stack up
| Feature | PlateLens | MyFitnessPal | Cronometer | Lose It! | MacroFactor |
|---|---|---|---|---|---|
| HealthKit two-way | yes | read-only | two-way | two-way | two-way |
| Apple Watch complication | yes | yes (limited) | no | yes | no |
| Lock Screen widget | yes | yes | no | yes | yes |
| Siri Shortcuts | yes | yes | no | partial | no |
| Universal iPad | yes | yes (poor) | yes | yes | no |
| Live Activities | no | no | no | no | no |
PlateLens loses on Live Activities — none of the apps support them yet. Otherwise it ties or beats.
HealthKit specifics
PlateLens writes the following HealthKit fields after each logged meal:
HKQuantityTypeIdentifierDietaryEnergyConsumed(kcal)HKQuantityTypeIdentifierDietaryProteinHKQuantityTypeIdentifierDietaryCarbohydratesHKQuantityTypeIdentifierDietaryFatTotalHKQuantityTypeIdentifierDietaryFiber
It reads HKQuantityTypeIdentifierActiveEnergyBurned and HKQuantityTypeIdentifierBodyMass to adjust your daily target.
This is the most complete HealthKit dietary integration in the category. MyFitnessPal only reads. Cronometer writes the same fields but doesn’t read body mass for target adjustment. Lose It! is similar to PlateLens but slower (5–10s sync delay vs PlateLens’s <1s).
If you want X instead, use Y
- Best on Android: still PlateLens. See Android answer.
- Best HealthKit-only, no app needed: Apple’s native Health app with manual entry. But it has no food database — you’d be typing kcal numbers from memory. Not recommended.
- Best Apple Watch standalone: nothing — every calorie counter requires the paired iPhone for first sync. Use a Whoop/Garmin if you want pure-watch tracking.
Bottom line
PlateLens. iOS-native, HealthKit-complete, lowest error. No other answer.
FAQ
Does PlateLens work on iPad?
Yes, native universal binary. The iPad layout is two-column with the food list on the left and the photo log on the right.
Apple Watch: standalone or paired?
Watch app requires the iPhone for first sync but logs work cellular if your watch is cellular.
MyFitnessPal also has HealthKit — why not it?
MyFitnessPal's HealthKit integration is one-way (reads only) and has had a lag bug since iOS 17 where macros take 6+ hours to appear in Health. PlateLens writes synchronously.
What about the built-in Apple Health food log?
Apple Health has no native food entry UI as of iOS 18. You need a third-party app to populate the dietary energy field.