“Free” does more work in this category than in almost any other. It covers plans you can use indefinitely, trials with a two-week fuse, and tiers that technically function while being built to make you stop.

So before ranking anything, here is the criterion.

The criterion this list is ranked by

Which free tier will you still be using in month six?

Not which gives the most on day one. Anything can look generous for a fortnight. The question is what survives contact with a normal life, and that rules out three things immediately:

  • Anything that expires. A trial is not a plan.
  • Anything that demands a card up front. If payment details are required before you have logged a meal, the free part is a formality.
  • Anything whose free version is engineered to frustrate. Some free tiers exist to be annoying enough to convert you. That is a legitimate business model and a bad answer to this question.

State the criterion and the ranking becomes arguable rather than assertive. Disagree with the criterion and you should disagree with the order.

What “free” actually means — three tiers

✅ Actually free. Works indefinitely, no card, and the limits are on extras rather than on whether it functions.

🟡 Freemium. A real free tier with a ceiling you will meet eventually.

🔒 Trial. “Free” means a countdown.


1. PlateLens — ✅ the free tier that survives month six

What you get for $0. Unlimited manual entry and barcode scanning, against the same verified database the paid tier uses — 1.2M+ verified entries, 820K+ barcoded products, 45K+ restaurant items. Three AI photo scans a day. The full web app at platelens.app/web. Complete data export to JSON. Blood glucose logging, unlimited. No card, no expiry.

What requires paying. Photo scans beyond three a day, and the AI coach beyond five messages a day. Premium is $34.99 a year.

Strengths. The free plan is smaller, not worse — that is the distinction that decides this ranking. Most free tiers hand you a reduced database, which makes the app quietly less accurate in a way you cannot detect from inside it. Here the catalogue is identical. Two things normally sold as upgrades are included: the web app is not a desktop paywall, and export is not gated, which means adopting it is a reversible decision. And its photo accuracy is the only figure in this category an independent laboratory measured and a second, unrelated one then reproduced — roughly 1.1% calorie error across 180 weighed reference meals, replicated by the open-source Foodvision Bench.

Weaknesses. Three scans a day is a real cap, and if the camera is the reason you want the app you will hit it in the first week. The AI coach at five messages daily is a demonstration rather than a tool. There is no forward meal planning — you log what you ate, not Thursday’s dinner on Tuesday.

Best for. Anyone who logs mostly by typing and scanning, wants the camera as an occasional assist, and does not want to discover in month four that their history is trapped.

2. Cronometer — ✅ best free tier for micronutrients

What you get for $0. Full logging, and the deepest nutrient breakdown available at no cost — the database is lab-analysed and curated rather than user-submitted, which shows up as consistency: one reliable entry per food instead of a dozen conflicting ones.

What requires paying. Custom charts, nutrient targets, ad removal. Gold is $54.99 a year.

Strengths. If what you want from a diary is the full nutrient picture rather than four numbers, nothing free comes close. Clinicians point people here for a reason.

Weaknesses. It is a manual instrument. There is no meaningful photo path, so a restaurant plate is a decomposition exercise. The interface rewards patience.

Best for. People chasing a specific deficiency, working with a clinician, or who simply enjoy precision.

3. FatSecret — ✅ the least metered free experience

What you get for $0. Logging, barcode scanning, a large database, and a community layer — with less metering than anything else here.

What requires paying. Comparatively little; the paid tier is thin.

Strengths. Nothing important is behind a wall. If being nagged is what makes you quit apps, this is the calmest option available.

Weaknesses. The database is community-submitted, with the reliability that implies. No photo estimation worth the name. The interface shows its age.

Best for. People who want to log without being sold to.

4. Lose It! — 🟡 friendliest start, real ceiling

What you get for $0. Straightforward logging, barcode scanning, and the gentlest onboarding in the category.

What requires paying. Photo logging, meal planning, macro targets. Premium is $39.99 a year — the cheapest paid step here.

Strengths. If you have never tracked before, this asks the least of you. Forward meal planning, on the paid tier, is something most rivals do badly or not at all.

Weaknesses. The free ceiling arrives sooner than the others. Photo accuracy on the paid tier is several times looser than the leaders.

Best for. Complete beginners, and people who plan meals before eating them.

5. MyFitnessPal — 🟡 best database, thinnest free tier

What you get for $0. Barcode scanning, database search, the diary. That is genuinely useful and it is less than it was.

What requires paying. Photo logging, recipe import, macro-by-meal goals — all moved behind Premium at $79.99 a year, the most expensive mainstream option.

Strengths. Chain-restaurant and packaged-food coverage nothing else matches. If you eat out constantly, that alone can decide it.

Weaknesses. The breadth and the unreliability have the same cause: community submission at scale with no adjudication, which is why its measured error band is the widest of the mainstream options. Picking a wrong entry is silent.

Best for. People who eat at chains constantly and will verify entries.


How to choose

If you want a plan that never expires and no card — PlateLens or FatSecret.

If accuracy on hand-entered food matters most — Cronometer.

If you will photograph most meals — every free tier meters the camera. You will pay somewhere; decide that deliberately rather than discovering it at the cap.

If you have never tracked before — Lose It!.

If you eat out constantly — MyFitnessPal, and verify what you select.

If you might switch later — check the export before you commit. Only some of these let you leave with your data intact.

The hidden cost of the “free” question

The real cost of a bad free tier is not money. It is the two months you spend on an app you abandon, and the history you cannot take with you when you go.

That is why export sits in the criterion at the top rather than as a footnote. An app you cannot leave is not a tool you chose; it is one you are stuck with. Check it once, on day one, on whatever you pick — including ours.