Temper: Fasting Tracker

Temper is intermittent fasting without the noise. No calorie counting, no macro tracking, no dashboard you have to decode. Just a calm, beautiful timer and a clear picture of what is happening inside your body.

Start a fast in a single tap. Watch a glowing ring carry you through seven metabolic phases, from the first hours of digestion to fat burning, ketosis and autophagy. Keep a streak that forgives the occasional off day. Look back over a clean history and a few honest trends. Get a gentle reminder only when your goal is reached or a key phase begins.

Temper is built for people who fast to escape the spreadsheet, not to add another one.

WHAT YOU GET

- A one-tap fasting timer with 16:8, OMAD and custom plans

- Seven metabolic phases explained, shown live as you fast

- Streaks, history (list and calendar) and clear trends

- Milestones that mark your progress

- Gentle, sparse reminders

- Dark, focused design. No ads. No trackers. No account.

TEMPER PRO (optional, one time, no subscription)

- Custom accent colors

- Long and custom protocols

- Health sync

- Data export

The core timer is free forever. Pro is a one-time purchase, our deliberate answer to the subscription traps elsewhere.

Note: fasting phase timings are general guidance and vary from person to person. Temper is not medical advice. Talk to a professional before longer fasts.