A fasting timer you can read at a glance
Choose one of eight Free goals from 13 to 72 hours, start the clock and close the page. When you return, the dial shows elapsed time, your goal and the estimated fasting phase.
Independent web app from Zug, Switzerland
A private fasting tracker. No account required.
Start a timer, log water and mood, and see how your routine develops. nüchtern runs in your browser, works offline after loading, and keeps your fasting history on your device.
No App Store · No onboarding quiz · Add it to your home screen if you want
One clear dial time · goal · phase
0
accounts to create
8
fasting goals in Free
CHF 29
Pro, paid once
Zug
independently made
01 — HOW IT WORKS
Start in seconds. Check in when it suits you.
There is no setup sequence. Choose a fasting goal and start the timer. Water, mood, history and practical guidance are there when you need them.
Water without the admin
Log a glass in one tap. Set your own daily target and glass size, then get on with the day.
A history you can actually use
Review completed fasts, streaks, milestones and mood patterns over time. The Journey tab explains timing and fasting phases in plain language.
Fast Together, kept small
See a friend’s timer beside yours and send a short encouragement. You connect with a code you share yourself, not a public profile.
One useful daily cue
Get one time-of-day suggestion about light, movement, food timing or rest. It is computed on your device, and you can open the reasoning when you want it.
02 — TOGETHER
Fast with a friend. Skip the social network.
Share a code with someone you know. You can see each other’s progress, send a small reaction and end the connection whenever you choose.
- No public profile, followers or feed
- Share a mood signal only if you choose
- Rotate your connection code whenever you like
03 — PRIVACY
Your fasting history belongs on your device.
The core tracker stores your fasts, water, mood, history and settings in your browser’s local storage. There is no account database behind it.
- No account or login
- No advertising inside the app
- Exported backups remain under your control
01
Fasting history
Stays in your browser’s local storage.
02
Optional live sync
Fast Together relays only the small status or message you choose and expires it automatically.
03
Anonymous page counts
If GoatCounter is enabled, it receives aggregate page counts—not your fasting, water or history data.
04
Clear documentation
04 — PRO
Use Free without a deadline. Buy Pro once if you need more.
The fasting timer, water tracking, mood check-in, guides and eight goals stay free. Pro adds a deeper record and directly supports independent development.
- Complete fasting history
- Custom goals from 1 to 168 hours
- Keep the fasting dial awake
- 40-day snapshots plus export and import
- Guided breathing and the full mood pattern
- Additional themes and up to eight Fast Together friends
INDEPENDENT REVIEWS
Real users. Reviews stored somewhere we do not control.
nüchtern uses Trustpilot as an independent place for customer reviews. Reviewers sign in to their own Trustpilot profile, and nüchtern cannot edit their rating or their words.
The same neutral invitation is for every customer. No reward is offered for a positive review.
05 — QUESTIONS
A few practical answers.
Do I need to create an account?
No. Open the tracker, choose a goal and begin. There is no registration, login or profile.
Is Pro a subscription?
No. Pro is a single CHF 29 purchase. There is no recurring charge or renewal.
Where is my information stored?
Your fasts, water, mood, history and settings are stored in your browser on your device. Fast Together’s optional live relay is the narrow exception: it sends only the status, reaction or short message you choose and expires it automatically. The privacy policy documents the details.
Do I have to install an app?
No. nüchtern runs in a modern browser. You can add it to your iPhone or Android home screen for a full-screen, app-like experience, and it works offline after it has loaded.
How is Pro delivered?
After secure checkout, you receive a license key. Enter it in Settings → nüchtern Pro. Once verified on a device, it works there offline without an expiry check.
Is nüchtern medical advice?
No. nüchtern is a wellness tracker, not a medical device, and it provides no diagnosis or treatment. Speak with a doctor before changing your health routine—especially before any fast longer than 24 hours—and follow the safety guidance in the app.
Try the Free tracker first.
Open nüchtern, choose a goal and start. If the deeper history becomes useful later, Pro will still be there.