MeAgain records your day.
Bild Health measures your body.

Two things from MeAgain’s own record are worth knowing before you weigh this choice. Its premium tier covers exactly four things (photo food logging, Journey Cards, the Capybara widget and unlimited Capy chat) while the daily loop stays free. And its iOS app has not shipped a release since May 2026 while its ratings keep climbing, which reads like a big release brewing rather than a stall; check its version history before you decide.

MeAgain is not a thin app, and this page is not pretending otherwise. It takes food by photo, by voice, by barcode, by search and by quick-add. It logs injections and pills across the major GLP-1 products, remembers your sites and helps you rotate them, rates side effects on a 0–10 scale, estimates your medication level and builds dose-timing guidance on top of it. It runs on iOS, on Android and as an iMessage extension. Our own teardown rated its protein quick-add the single best screen across seventy-eight screens of competitor product.

All of that is capture. The question is what comes back out. By MeAgain’s own published account, progress is a weight trend, progress photos and Journey Cards. Nothing MeAgain publishes describes a body-fat, lean-mass or smart-scale feature: its own muscle-loss page raises body composition only to say an app is not where it gets measured.

Feature by feature

Thirteen rows, and MeAgain wins or ties eight of them. That is the point. The gap is four lines at the bottom. And they happen to be the ones that answer whether the weight you lost was the weight you wanted to lose.

Two months a share card can’t tell apart

Eight weeks. Twenty pounds down. Same doses, same streak, same card.

In the first version, protein landed most days and you trained twice a week, and nearly all of it came off as fat. In the second, your appetite fell off a cliff, protein came in low, training stopped, and a quarter of those twenty pounds was lean tissue.

Every log MeAgain keeps reads the same in both versions: the meals captured, the streak intact, the weight falling on schedule. Under-eating protein is invisible to a food log precisely because the log only knows what you told it. The month it finally shows up in what you can lift is a month you cannot re-run.

The fix is the weigh-in you already do, done on a scale that reports composition: the reading arrives through Apple Health with nothing extra to type.

The protein number, and what it divides by

MeAgain describes its protein, fiber and water goals as tuned for GLP-1 users who eat less. It does not publish the formula, and we are not going to guess at it. What we can say is what a lean-mass denominator requires, a lean-mass measurement, and nothing in MeAgain’s published feature set collects one. Bild Health’s Goal Engine works on that measurement: 2.4 g per kilogram of fat-free mass in a deficit, easing to 2.0 near goal, never below 80 g for men or 60 g for women. Nothing here tells you what to eat; the narrow point is that a target sized to working tissue needs a number for the working tissue, and a food-first app has nowhere to get one. The rule is public: the free calculator runs it, and the plan it belongs to is the keep-the-muscle guide. MeAgain’s place among all thirteen apps is in the full comparison.

Where these numbers come from, and what they don’t cover

The lean-mass figure here is the range a 2026 DEXA-and-MRI meta-analysis reported across twenty trials, each medication pooled on its own. A broader 35-trial review found no study measuring objective physical function: these numbers describe mass, not what mass can do. The protein figures come from controlled energy-restriction work in populations that were mostly younger, often trained and often male. No randomized trial has tested sleep, protein or training in people taking a GLP-1 specifically — the evidence comes from energy-deficit studies generally, which is exactly why measuring your own result matters.