6 guides
Tools
The apps people use to track food and health, judged on whether their numbers have been checked.
Explainers
How Accurate Is Cal AI?
The most heavily marketed AI calorie app is also the only major one whose accuracy figure exists purely as marketing — no published methodology, no disclosed test set, and a methodology note explaining why an independent research group could not evaluate it at all.
Limited evidence2 Nov 2026
How Accurate Is Cronometer? (And What's Actually Free)
The best micronutrient database in consumer tracking, a solid mid-pack accuracy figure — and a paywall sitting exactly where the modern logging features live. What the weighed-food data says, and what Gold buys.
Moderate evidence2 Nov 2026
How Accurate Is Lose It!?
The friendliest first week in calorie tracking, the second-highest error ever measured on the same weighed plates — an honest look at what simplicity costs in the arithmetic, and when that trade is the right one.
Moderate evidence2 Nov 2026
How Accurate Is MacroFactor?
The best adaptive-coaching idea in the category, a solid mid-pack measured figure with a catch — the portion is yours to supply. And there is no free tier at all. What the weighed-food data says about the app lifters swear by.
Moderate evidence2 Nov 2026
How Accurate Is MyFitnessPal?
The biggest food database in consumer tracking is also the least-accurate calorie figure ever measured against weighed food — 11.2% error in the one head-to-head test that used a scale. Here is what that number means, why it happens, and what to do about it.
Moderate evidence1 Nov 2026