ONE: Intermittent fasting

ONE - Your Complete Intermittent Fasting Tracker & AI Protein Calculator

Fasting made simple. Start a fast in one tap, watch your body move through
each stage, and build the streak that actually changes things.

ONE is an intermittent fasting timer and tracker built for people who want
the habit, not the homework — a simple fasting app that helps you lose weight. No account. No clutter. Just the timer, the stages, and your
progress.

Whether you're starting fasting or already experienced, ONE keeps you
consistent — ideal if you're looking for a bodyfast-style fasting
experience without the clutter.

CHOOSE YOUR PLAN
• 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD (23:1)
• Flexi mode for open-ended fasts
• Difficulty rating on every plan, so you pick one you'll actually keep
• Change plan any time — nothing is locked in

WATCH WHAT'S HAPPENING
• Live fasting stages: blood sugar falling, fat burning, ketosis, autophagy
• Know exactly when the next stage arrives
• Plain-language explanation of what your body is doing and why

STAY ON TRACK
• Reminders when your fast starts and ends
• End your fast straight from the notification
• Fix your start or end time when life happens
• Daily streaks that reward consistency, not perfection

SEE YOUR PROGRESS
• Every fast, logged automatically
• Streak calendar and total fasting hours
• Weight and water tracking
• Weekly and monthly AI summaries that read your data and tell you what
changed — and what to try next

BUILT TO STAY OUT OF THE WAY
• Start fasting in under a minute — no sign-up
• Works offline
• Optional backup so your history follows you to a new phone

ONE Plus unlocks full history, trends, the AI coach, custom plans and cloud
backup. The timer itself is free, forever.