What is Fit Rocket?
Fit Rocket is a free web app that projects an honest goal date for weight loss. You log your calories and your weight; the app shows the deficit your logs claim next to what the scale confirms — your own numbers audit each other — and your goal date is projected from the pace you're actually keeping, not from a formula.
Is it free?
Yes — free, with no ads and no third-party trackers, and nothing you log is sold. Even the app's own product analytics run on its own infrastructure. The only thing it asks for is a Google sign-in.
Do I need an account?
Not to look around. The home page has a full sample journey you can explore without signing in — six weeks of believable data with everything working — and nothing you do in it saves. To keep your own data, sign in with Google; your logs live under that account.
How does the goal date work?
It's a projection from your recent pace — the deficit you've actually banked over the last week or so, run forward to your target weight. Push harder and the date pulls closer; ease off and it drifts out. The full math, including the trend smoothing, is on The method page.
What happens when I skip a day?
It simply doesn't count. There's no streak to protect and no guilt waiting when you come back — a day you didn't log just isn't part of your pace, the way it wasn't part of your week.
Why don't workouts reduce my calorie count?
By design. If you wear a watch, its active burn already includes that workout — crediting the workout too would count the same calories twice. The diary keeps the record of what you did; the burn number keeps the math honest.
How do I log a meal?
Snap a photo, say it out loud, or type it. The calories are counted for you, and nothing saves until you confirm. If the count looks off, add a note — "half of that was rice" — and it recounts.
Does it work with Apple Health?
On iPhone, yes. An optional nightly import — a Shortcut you set up once from Settings — writes your scale weight and your watch's active burn into the day's log while you sleep, so those two numbers never need typing. On Android there's no equivalent yet; weight and burn are quick manual entries.
What units does it use?
Kilograms only, for now. Weight, targets, and every chart speak kg — pounds aren't supported yet.
Can I install it like an app?
Yes. Fit Rocket is a PWA: open it in your phone's browser, use Add to Home Screen, and it runs like a native app — standalone window, home-screen icon, instant launches. Settings shows the exact steps for your platform.
Can my AI assistant use it?
Yes — Fit Rocket is an MCP server. Mint an agent key in Settings → Connected agents (read only, or read & write if it should log for you), point your agent at the server, and it can read the same numbers the dashboard shows. Keys are shown once, named per agent, and revocable any time. Setup lives on the Connect an AI agent page — you'll need a free account first.
Who sees my data?
Your logs live under your own account, and the security rules keep them there — only you can read them. Food photos go into private storage only you can access, and product analytics run on the app's own infrastructure — not Google Analytics, not any other outside service.
Who builds it?
One person, who uses it every day — most of the code is written by an AI pair, and every change is reviewed before it ships. There's no company behind it; it's a personal project, shared with anyone it might help.