Coming soon to the App Store
Fasting first.
Targets that adapt to you.
Reserve is a calorie tracker built around the two things other apps treat as afterthoughts: your fast, front and center — and a calorie target that learns from your real intake and your real weight trend.
Notify me at launchFree to use — no account needed.
Why Reserve?
Four things other trackers get wrong — and Reserve gets right from the start.
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Fasting leads — it isn't an add-on
Other trackers bolt a fasting timer onto a calorie counter. In Reserve, the timer and your fast are the home screen, and everything else is built around them.
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Targets that adapt weekly
No static formula guess. Reserve adjusts your targets from your real logged intake and your real weight trend, so they match what your body actually burns.
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A week that flexes with your life
Eat lighter some days, bigger on others. Unused calories bank into your weekly reserve automatically — on a 1,701 kcal target, four light days can bank +840 kcal to spend later in the week. No hard daily pass/fail; the week is judged as one honest picture.
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A free tier that's actually generous
The fasting timer, barcode scanning, and adaptive targets are all free. Your raw history and timestamps are never paywalled.
Free vs Premium
The core of Reserve is free, full stop. Premium is one bundle of convenience and depth on top — never the basics held hostage.
Free
- Fasting timer with windows, history, and streaks
- Adaptive weekly targets and check-ins
- Weekly calorie reserve
- Barcode & label scanning
- Full tracking — raw history and timestamps never gated
- Guest mode — no account required
Premium
- AI food logging — plain words or a photo
- Siri voice logging
- Trend Lab — projections and what-if scenarios
- Recipe importer and target scheduler
- Custom charts and fasting phases on the timer
Pricing announced at launch.
Questions
When does Reserve launch?
Reserve is in final development now — the backend, accounts, and sync are built and tested, and the app is headed to TestFlight next. Join the launch list below and you'll hear the moment it's live on the App Store.
Is Reserve really free?
Yes. The fasting timer, adaptive targets, weekly reserve, barcode and label scanning, and all core tracking are free — including in guest mode with no account. Premium adds AI logging, Siri voice logging, and deeper analytics as one bundle. Pricing will be announced at launch.
How do adaptive targets work?
Instead of trusting a one-time formula, Reserve compares what you actually ate with how your weight actually moved, estimates your real daily expenditure, and nudges your weekly targets to match. If your body burns more — or less — than the formula guessed, your target finds out within a couple of weeks.
Do I need an account?
No. Guest mode is fully functional and keeps everything on your device. An account (Sign in with Apple or email) only adds cloud sync across devices.
Be first in line.
Reserve launches soon. Send one email and you'll get a single reply when it's live — nothing else, no newsletter.
Join the launch listOpens your mail app, addressed to jackfr4st@gmail.com