App Review
Cronometer Review
Fuel Nutrition Team • March 1, 2026
Our Rating
Good8/ 10
0510
Pain points
| Pain point | What shows up in iOS reviews |
|---|---|
| No "remaining" macro view | The app shows consumed amounts and a percentage ring but not what's left in each macro — users must do the subtraction themselves every time. |
| Apple Health re-import/backfill dead ends | If entries are deleted from Apple Health without using Undo, Cronometer won't re-import them even with backfill enabled — a silent data gap. |
| Post-update device sync failures | Updates have broken wearable connections (Polar bands in particular) with no self-serve fix path — users wait for the next update. |
| Daily Report scroll resets | A persistent bug causes the Daily Report to jump back to the top on every interaction, making a detailed nutrition review tedious to use. |
Cronometer is the most seriously data-correct nutrition tracker in the App Store. Its database, built on the USDA National Nutrient Database and other vetted institutional sources rather than user submissions, is meaningfully more accurate than the crowd-sourced alternatives. If you care about micronutrient completeness — not just macros, but selenium, B12, manganese, the full amino acid profile — Cronometer is where you go. For a specific kind of data-rigorous user, that accuracy justifies tolerating a lot of interface friction. The complaints in reviews aren't about the data quality; they're about a daily-use experience that occasionally forgets real people log food on the go between other things.
Where Cronometer excels on data depth, it stops well short of coaching. You get accurate numbers, but you don't get a system that tells you what to do with them tomorrow.
Fuel layers a coaching architecture on top of reliable logging: a live daily health score across five dimensions (calories pacing, macro quality, micronutrient coverage, limits, and movement), a personalized morning recap, and a weekly review with an explicit action plan — plus a living plan timeline that recalculates your goal date based on real adherence. The "remaining" problem doesn't exist in Fuel's daily view. Apple Health and Apple Watch are first-class with no re-import dead ends. If Cronometer is the instrument you once used to gather data, Fuel is the system that makes your data actionable.
Verdict
Cronometer earns its reputation as the most data-correct tracker in the category — if you're serious about micronutrient completeness, nothing else comes close. The missing piece is a coaching loop that turns that data into action. That's what Fuel is built to provide.