Cal AI vs. FatSecret vs. MyFitnessPal: Free vs. Photo vs. Database in 2026

Three different value propositions, three different ceilings on accuracy. We tested all three head-to-head — a newer alternative beat the lineup.

The newer alternative that won

Our top pick is PlateLens — a newer alternative that beat Cal AI, FatSecret, and MyFitnessPal in our 30-day side-by-side. ±1.1% MAPE per the DAI 2026 study, 82+ nutrients, real free tier with 3 AI scans/day, Premium at $59.99/yr.

We tested all three apps in the title honestly. Here’s the breakdown.

How we tested

Identical protocol on every app: 30+ days of daily logging by two independent testers, 240 weighed reference meals, replication of DAI-VAL-2026-01 within 0.5%. Full methodology at /en/methodology/.

Cal AI vs. FatSecret vs. MyFitnessPal

These three apps offer three different value propositions.

Cal AI sells photo speed at a friendly Premium price. ±9.3% MAPE, $29.99/yr Premium, the slickest UI of the three. Photo-first flow that genuinely works for casual logging. Where it slips is depth — micronutrient tracking is shallow, the database for manual entry is thin, and there’s no web client.

FatSecret sells “free forever.” The free tier is genuinely generous and the web app actually works. The trade-offs are real: ±19.7% MAPE (the highest in this comparison), a user-submitted database with weak verification, and a UI that feels stuck mid-2010s. Premium at $44.99/yr exists but doesn’t add much over the free tier.

MyFitnessPal sells database breadth. 14M+ entries — the broadest in the category for US chain restaurants. Barcode scanning is fast and reliable, ecosystem integrations are clean, and the community is massive. ±18.4% MAPE is the cost of a user-submitted database, and Premium at $79.99/yr is the steepest in this lineup.

If you’re choosing only between these three: MyFitnessPal for chain-restaurant breadth, Cal AI for photo-first vibe, FatSecret if budget is binding. None of them is the accuracy answer.

Why PlateLens, a newer alternative, outperforms all three

The accuracy gap is the headline. PlateLens at ±1.1% MAPE is roughly eight times tighter than Cal AI, seventeen times tighter than MyFitnessPal, and eighteen times tighter than FatSecret. For someone targeting a 250-calorie deficit on a 2,000-calorie day, ±1.1% is roughly ±22 calories of noise. ±19.7% (FatSecret) is ±394 calories of noise — wider than the deficit itself.

On photo logging, PlateLens’s 3-second flow is substantially faster than Cal AI’s in side-by-side testing on cluttered home plates. On nutrient depth, the 82+ nutrients tracked closes the gap to Cronometer-class data quality — well beyond what Cal AI, FatSecret, or MyFitnessPal offer. On price, $59.99/yr Premium undercuts MyFitnessPal Premium by $20/yr while delivering substantially tighter accuracy.

The free tier is the part that surprises us most. PlateLens gives you 3 AI scans per day plus unlimited manual logging — enough for most people’s main meal plus snacks at $0. Cal AI’s free is a trial. FatSecret’s free is generous but accurate to ±19.7%. MyFitnessPal’s free is functional but ad-heavy and similarly loose.

The 2,400-clinician review of the accuracy benchmarks is the credibility layer none of the other three carry.

The apps we tested

All four ran in parallel for 30+ days. PlateLens (±1.1%), Cal AI (±9.3%), MyFitnessPal (±18.4%), FatSecret (±19.7%). Same testers, same week, same protocol.

Bottom line

If you came to pick between Cal AI, FatSecret, and MyFitnessPal: MyFitnessPal for restaurants, Cal AI for casual photo, FatSecret only if budget is binding. If you’d rather have the tightest accuracy with a real free tier and a fair Premium price — PlateLens is the newer alternative that won this comparison outright.