Your body.
Your trajectory.
A fitness app that learns your plan, predicts your weight and walks with you every day.
Android 8+ · 100% offline-first · Your data never leaves your phone · 5 languages · Free forever
63
Unlockable achievements
12wk
Weight forecast horizon
5
Supported languages
$0
Cost · no in-app
Everything your body needs,
in one app.
Forecasting that understands your trajectory
Prophet model tuned to your signals: steps, fasting, hydration, GLP-1, anthropometry. 4–12 week projections with feature importance and a local mirror for when there's no internet.
Today
73.1 kg
In 4 weeks
71.8 kg
Macros with Open Food Facts
Search across 2M+ products, label scanning, recipes, restaurant menus (McDonald's, KFC, Starbucks, Subway...) and manual entry.
Hydration
Quick-adds +200/+330/+500/+750 ml
Intermittent fasting
Native timer + phases + history
Native steps
TYPE_STEP_COUNTER sensor offline
Three steps.
Zero friction.
01
Quick onboarding
Age, weight, height, goal. We compute your TDEE with Mifflin-St Jeor and suggest macros — always editable.
~2 minutes
02
The app learns
Log weights, meals, water, fasts and workouts. The more you use it, the better it predicts — it needs ~10–14 days to start being precise.
1–2 weeks
03
Predicts your weight
4–12 week trajectory with drivers (caloric deficit, fasting, GLP-1, anthropometry). Recomputes every session.
Continuous
Your data
never leaves your phone.
Almost everything is on-device: Room SQLite, native sensors, computation. Only the remote Prophet model receives anonymized time series — and there's always a local mirror as fallback.
Pedometer · Macros · Fasting
Never sent to servers. Your sensor, your database, your compute.
Prophet backend
Time series with no personal identity. Open source on Hugging Face.
Zero signup
No email, no password, no telemetry. Open the app and start.
Open Food Facts
Open nutrition database. No deals with brands.
Honest questions.
Does it work offline?
Yes. 95% of the app is fully offline: pedometer, macros, hydration, fasting, training, database. Only the remote Prophet model needs connection — and when offline, we use a local Kotlin mirror with a simplified calculation.
When iOS?
Currently Android only. iOS isn't planned in the short term — the app leverages native Android sensors and the Compose ecosystem. If demand emerges, it'll be considered after public release.
Is it really free?
$0 now and forever. No in-app purchases, no subscription, no ads, no telemetry. The infrastructure runs on free tiers (Hugging Face Spaces for Prophet, Open Food Facts for nutrition).
What happens with my data?
It lives on your phone (Room SQLite, encrypted at rest by the system). The only thing that leaves is a weight time series (no name, no email, no identity) when you recompute the remote forecast — and you can always disable the remote forecast in Settings.
Is it stable? It's beta.
It's private beta — functional but may have occasional bugs. If you find something off, there's a report channel (see footer). The backend has a local fallback, so even if the remote service fails, the app stays usable.
Start seeing
your trajectory.
Signed APK for Android 8+. Direct download — no Play Store, no accounts, no email.
Android will ask to "Install from unknown sources" the first time — normal for APKs outside Play.
Size
~65 MB
Version
v1.0.0 beta
Android
8+ (API 26)
Signature
v2 + v3