Your Personal Fitness OS.

Hevy, WHOOP, and Cronometer in one focused iPhone app. Workouts, recovery, and nutrition — under a single dark interface.

Coming soon to the App Store

Three apps, one interface

Recovery ring

WHOOP-style score from HRV, resting heart rate, and sleep — read straight from Apple Health.

Workout logging

Push / Pull / Legs / Upper / Full Body templates with live timer, set tracking, and a 0–21 strain score.

Macro tracking

Six meal slots with quick presets and custom foods. Calories, protein, carbs, fats — at a glance.

Sleep & trends

Seven- and fourteen-day charts for calories, protein, steps, and sleep. Workout streak at the bottom.

Built around four principles

On-device only. No account. No login. No server. Your data lives on your iPhone.
Apple Health native. Steps, sleep, HRV, resting heart rate, and workouts — read from HealthKit, never uploaded.
No ads, no tracking. No analytics SDKs, no third-party trackers, no profiling.
Premium feel. Dark, focused, fast. Designed for daily five-second check-ins, not endless scrolling.

Status

FitOS is in active development. The full five-tab interface is built and runnable on iPhone, Apple HealthKit integration is wired up, and TestFlight submission is in preparation. Follow along by checking back here — there is no signup form because there is no server.