Track fasts clearly
Follow popular fasting protocols and watch your progress build over time, with the window you are in laid out across the day so you can see it at a glance.
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Zen LeanTracker
Intermittent fasting, with the sleep, food and movement around it.
- iPhone
- Apple Watch
Why people pick it
Intermittent fasting without turning your health into a public leaderboard.
ScreensZen LeanTracker on
Zen LeanTracker on
iPhone and Apple Watch
What you getPurpose built
Purpose built
for one job.
Zen LeanTracker is designed for a single task and finished properly. Here is what that means in practice.
Sleep and recovery, read plainly
The app opens on how last night actually went: a sleep score, the time you needed against the time you got, and the night broken into awake, REM, core and deep, next to recovery and how hard the day has been on you.
Meals with the numbers that matter
Log what you eat against a daily calorie budget that grows when you move, with protein, carbohydrate, fat and fibre tracked against your own targets rather than a generic ratio.
A check-in that takes ten seconds
Rate energy, body and mood in the morning, so the app has something honest to compare the numbers against and you have a record of how the routine actually felt.
Body composition without the shame
Height, weight, body mass index against the healthy range, and a weight line that trends over time. Numbers reported flatly, with no percentiles and no verdict about you.
Account sync across devices
Meals, fasts, workouts, and health summaries sync to your account so they survive a new phone. Sign in with Apple, with Google, or with an email address. Signing in is required.
On your wrist too
The Apple Watch app carries body and recovery, meals with calories and macros, workouts, and your fast, so you can log and check in without reaching for the phone.
Health connections you control
Connect Apple Health, or connect Google and bring in what a Fitbit has already recorded. Whatever you allow feeds the sleep, recovery and activity readings the app works out for you. Read access only, revocable whenever you like, and never sold or used for ads.
Guidance from your patterns
Get gentle guidance shaped by how you actually fast, not noisy scoreboards.
Reminders that nudge, not shame
Reminders help a routine hold together without turning a missed window into a lecture, and you decide which ones you want.
Simple to set up
Start a fast without a setup interview. Popular protocols are ready to pick, and the rest can stay untouched.
In the boxEverything it does,
Everything it does,
in plain language.
- Fasting
- Popular protocols, with the window laid out across the day
- Sleep
- Scored and broken into stages, next to recovery and day strain
- Meals
- A calorie budget that grows when you move, with macros against your targets
- Check-in
- Energy, body and mood in the morning, in about ten seconds
- Body
- Weight and body mass index trending, without percentiles or verdicts
- Apple Watch
- Log and check in without reaching for the phone
- Connections
- Apple Health, or Google to bring in what a Fitbit recorded
- Reminders
- Enough to hold a routine together, without lecturing you
Privacy-minded fasting support, coming soon.
PermissionsWe ask in context,
We ask in context,
and no is a complete answer.
Most apps ask for everything at launch and explain nothing. We ask for a permission where the feature lives, tell you what it unlocks, and keep the app working if you decline.
Nothing to start
Open the app and use it. No account, no email, no verification step before you can do the thing you came to do.
Asked where it matters
A permission request appears next to the feature that needs it, in plain language, at the moment you reach for that feature.
Saying no keeps everything
Decline and the app still does its job in full. Allow it and that one feature does a little more, on your device.
QuestionsZen LeanTracker,
Zen LeanTracker,
answered plainly.
Is Zen LeanTracker only for experienced fasting users?
No. It is designed for beginners and experienced users, with clear guidance and flexible goals.
Can I bring in what my Fitbit already recorded?
Yes. Fitbit is part of Google, so you connect Google once and the activity, sleep and heart data recorded by a Fitbit comes in through that same connection. It is read access only, we never see your Google password, and you can disconnect in the app or revoke it from your Google account at any time. Apple Health connects separately, and you can use either, both, or neither.
Where is my data stored?
Your account syncs to servers we operate so history can follow you to a new device. You can delete your account in the app to request removal. See the Privacy Policy for full detail. This app is not a medical device and does not replace professional advice.
Will Zen LeanTracker replace medical advice?
No. It supports habits and tracking, but it is not a medical diagnosis or treatment tool.
Can I use it while traveling?
Yes. Your logs stay with your account, so you can keep momentum even when your daily schedule shifts.
In buildBuilt for one job.
Coming soonBuilt for one job.
Trusted with the rest.
Read the privacy policy before you install. Stores show any price before you buy.