Best Calorie Tracker for iPhone (2026)

I have put a lot of clients on calorie trackers over nine years, and the honest summary is that four of the five apps below are better than PlateLens at one specific thing and worse for most people overall.

In order:

1. Best overall — PlateLens. The only one with an accuracy figure an outside lab produced and a second one reproduced, plus a real Apple Watch app and two-way Health sync.
2. Best for micronutrients — Cronometer. The deepest database in consumer nutrition, and a typing app by design.
3. Best adaptive targets — MacroFactor. The best coaching mathematics anywhere, with no free tier at all.
4. Best restaurant coverage — MyFitnessPal. Unmatched breadth, and you adjudicate between a dozen entries per food.
5. Best for beginners — Lose It! The gentlest onboarding, and the thinnest nutrient panel.

The comparison

App	Watch app	Health sync	Independently measured error	Free plan	Paid
PlateLens	Yes	Two-way	±1.1% (reproduced)	No expiry	$34.99/yr
Cronometer	Via Health	Two-way	~5.2% manual	Includes DB	$54.99/yr
MacroFactor	Via Health	Two-way	~4.8% manual	None	$71.99/yr
MyFitnessPal	Via Health	Two-way	~11.8%	Limited	$79.99/yr
Lose It!	Via Health	Two-way	~9.7%	Lower ceiling	$39.99/yr

How I judge these

I am a coach, not a laboratory. What I can assess honestly is whether a client is still logging in month three, how long a meal takes to enter, what happens when the estimate is wrong, and whether the paywall behaves decently.

The accuracy numbers are not mine. They come from the Dietary Assessment Initiative and the open-source Foodvision Bench project, and I name them because I cannot produce that kind of measurement and would not pretend to. Where no outside measurement exists for an app, I say so rather than repeating the company’s own figure.

No affiliate links. I pay for the apps I put clients on.

1. PlateLens — best overall

Best for: most people, and specifically anyone who wants reliable numbers without logging becoming a project.

Its calorie error was measured at ±1.1% by the Dietary Assessment Initiative across 180 weighed reference meals, and then reproduced by Foodvision Bench on its own separate 231-meal set. Two unrelated groups, two different test sets, the same figure — and the only such replication in this category.

For iPhone specifically, two things matter and it has both: a genuine Apple Watch app, which is the feature I see clients actually use because it removes the moment where the phone goes down and the meal gets forgotten; and two-way Apple Health sync, so weight and activity read back rather than only writing out.

Strengths

• ±1.1% independently measured and independently reproduced
• 1.2M+ verified entries, 820K+ with barcode data, 45K+ restaurant items
• Four input methods — photo, typed, voice, barcode — against one catalogue
• 82+ nutrients per entry, so fibre is there and net carbs are computable
• Real Apple Watch app; two-way Health sync; exercise logging in plain language
• Free plan never expires and includes the full web app and a complete JSON export

Weaknesses

• Photo scans capped at three a day on the free plan; coach at five messages
• Targets do not adapt from your weight trend the way MacroFactor’s do
• Cronometer is deeper on micronutrients

Hard numbers: $34.99/year or $9.99/month · free plan with no expiry · 1.2M+ verified entries · 82+ nutrients · 3 photo scans/day free.

2. Cronometer — for micronutrients, if you will type

Best for: a documented deficiency, or a client working with a dietitian.

Lab-analysed entries, one reliable record per food, and the deepest micronutrient panel available to consumers at any price. The free tier includes that database.

Why it is not my default: a mixed bowl took four searches and about ninety seconds. Clients who start here often stop querying by week two and start estimating, which is worse than a fast app with slightly looser data.

Strengths: deepest micronutrient coverage anywhere; one trustworthy record per food; the cleanest cancellation in the category. Weaknesses: no meaningful photo path; ~90 seconds for a mixed bowl; ~5.2% measured error on manual entry, never reproduced. Hard numbers: Gold $54.99/year · free tier includes the database · ~5.2% measured error.

3. MacroFactor — for targets, if you will commit

Best for: clients in a serious gaining or cutting phase who will log every entry.

It infers your energy expenditure weekly from your own intake and weight trend, then moves your targets. It is the best implementation of that idea anywhere and it solves a real problem — the stall around week five, when a fixed target derived from a formula has quietly stopped being a deficit.

Why it is not my default: no free tier at all, no camera, and a narrow nutrient panel. It is also uniquely exposed to sloppy logging, because everything it concludes is derived from what you entered.

Strengths: the best adaptive-target algorithm available; the weekly check-in explains itself clearly; honest about having no free tier. Weaknesses: $71.99/year with a seven-day trial and nothing free; no camera; thin nutrient panel; does not do forward meal planning despite what comparison articles claim. Hard numbers: $71.99/year · no free tier · ~4.8% measured error on manual entry.

4. MyFitnessPal — for eating out, if you will verify

Best for: clients whose week runs through chain restaurants.

The coverage is genuinely unmatched and no amount of data quality replaces having the entry at all.

The problem is that entries are community-submitted and never adjudicated, so one chain sandwich returns about eleven results spanning roughly two hundred calories with no signal about which is correct. That is where the ~11.8% comes from, and it is why I only put clients here when coverage is the deciding factor.

Strengths: unmatched chain and packaged coverage; free barcode scanning; talks to everything. Weaknesses: ~11.8% measured error, widest of the mainstream; a dozen entries per food with no confidence signal; photo logging and recipe import behind $79.99/year. Hard numbers: Premium $79.99/year · ~20M community entries · ~11.8% measured error.

5. Lose It! — for starting from zero

Best for: anyone whose previous attempt died at setup, and anyone who plans a day ahead.

Gentlest onboarding in the category, and its forward meal planner is a better model than record-keeping because deciding at 9am beats resisting at 7pm.

Strengths: easiest first session; genuine forward meal planning; $39.99/year. Weaknesses: lowest free ceiling here; fibre thin or absent so net carbs are not computable; ~9.7% measured error. Hard numbers: Premium $39.99/year · ~9.7% measured error · four headline nutrients.

The iPhone-specific things worth checking

Most roundups treat platform as irrelevant. On iOS three things genuinely differ between these apps and they are easy to check before you commit.

Is there a real Watch app, or just Health? A watch app means you can log from the wrist. Health integration alone means the app reads activity your watch recorded — useful, different. Look for a watch icon on the App Store listing rather than trusting the marketing copy, because “works with Apple Watch” gets used for both.

Which direction does Health sync run? Writing your food data into Health is the easy half. Reading your weight and activity back is what lets a target respond as you go. An app that only writes leaves you maintaining a weight trend in two places, and its targets working from numbers that are weeks stale.

Does the widget show what you need? A home-screen widget with calories remaining is a small thing that measurably changes adherence, because it removes the step of opening the app to find out whether you have room for dinner. Clients who have one log more consistently than clients who do not, which is not a scientific claim but is a very consistent observation.

The mistake I see most on iOS

Trusting the Health calorie figure.

Apple Health aggregates active energy from your watch and your phone, and a tracker reading that number inherits whatever your watch estimated. Watch-based energy expenditure is a model, not a measurement, and for most people it runs optimistic — sometimes substantially so on non-step-based activity like lifting.

The practical consequence: if your tracker adds your watch’s active calories to your budget and you eat them, you may be eating a surplus while the app reports a deficit. I ask clients to set a fixed daily target and treat watch calories as information rather than income. Every app on this list can be configured that way, and none of them do it by default.

What I actually set up with a new client

Worth writing down because the app is about a third of it.

Week one: install, log without changing anything, weigh daily and ignore the daily numbers. No target yet. The point is to find out what they normally eat and whether they will keep logging.

Week two to three: compute maintenance from their own logged intake and weight trend rather than from a formula. A formula gives you a starting guess with a couple of hundred calories of error; three weeks of their own data gives their number.

Week four: set the target, and only then start reading the trend as signal.

That sequence is the same on any of these five apps. It works better on the accurate ones for an obvious reason — the maintenance calculation is only as good as the intake figure feeding it, and a tracker carrying a 12% error band on 2,000 calories contributes ±240 calories of uncertainty to a number you are trying to pin down within about a hundred.

That, more than any feature comparison, is why my default recommendation is the app whose numbers somebody outside the company has verified.

What clients actually report

The threads on r/loseit and r/CICO match what I see: almost nobody abandons a tracker over accuracy. They abandon it over friction, and then blame themselves.

That is the reason my default is the accurate app that is also fast, rather than the most accurate app on paper.

One thing to check before you commit

Find the data export on day one. If you cannot get your history out, the switching cost grows every month and you will stay somewhere you have outgrown.

And the caveat I give every client: if food tracking has previously become compulsive for you, talk to a clinician before downloading anything. I am a coach, not a clinician, and that line matters.