Two numbers, not a calorie budget
Fit Rocket doesn't hand you a calorie budget to hit. Each day you log two sides of one loop. The input side is intake (the calories you ate) and burn (the calories you spent) — together with your BMR they make a daily deficit. The output side is just your weight, from the scale.
The two are supposed to agree. When the deficit you've banked and the weight you've actually lost move together, your tracking is accurate. When they drift apart, the gap between them is your logging error — usually calories you ate but didn't count. Fit Rocket isn't a diet app, and it doesn't police what you eat — it puts both numbers side by side and lets the scale keep you honest.
A goal date that moves with your pace
Your goal date isn't a formula's promise. It's a projection from your recent pace — the deficit you've actually banked over the last week or so, run forward. Push harder and the date pulls closer. Ease off and it drifts out. The number moves because you did, not because a plan says it should.
Skip a day and it simply doesn't count. There's no streak to protect and no guilt waiting for you when you come back — a day you didn't log just isn't part of the pace, the way it wasn't part of your week.
The scale keeps score
Fit Rocket calls this comparison the Reality check: what your logs predicted, next to what the scale actually says. When the two move together, you're tracking accurately. When they don't, the Reality check says so plainly, and names how many days were fully logged — so a handful of missing days can't quietly pass as good news.
About every two weeks, if the gap between your logs and the scale holds up across two solidly-tracked fortnights, Fit Rocket offers to adjust your personal burn. Nothing changes without your say-so — accept it, decline it, or leave it alone, and undo it any time in Settings → Tracking.
Meals and workouts
Log a meal three ways:
- Snap a photo
- Say it out loud
- Type it
Fit Rocket counts the calories and asks you to confirm before anything is saved.
Workouts are different on purpose. Log a lift or a run and it stays in your diary as a record — it never gets added to your burn. If you wear a watch, its number is already counted there; letting a workout add to it too would count the same calories twice.
Health import and training plans
On iPhone, an optional nightly import pulls last night's scale weight and your watch's active burn straight from Apple Health, so those two numbers never need typing.
Training plans (strength blocks, running plans) advance by what you actually complete, not by the calendar. Skip a session and nothing marks it missed — the plan just waits for you to pick back up.
Connect an AI agent
Fit Rocket is also an MCP server (Model Context Protocol). Point an agent you trust at your account (Claude, or anything else that speaks it) and it can read your live numbers: your pace, your projected date, your Reality check. Give it a read & write key, and it can log a meal or a weigh-in for you too.
Keys are minted in Settings → Connected agents, shown once, named per agent, and revocable any time — read only or read & write, your call.
Privacy
No ads, no third-party trackers. Fit Rocket doesn't sell what you log, and even its own product analytics run on the app's own infrastructure — not Google Analytics, not any other outside service.