Tyvin

Fasting, without the noise.

Fasting timer without a subscription. Pay once, own it forever. No account, no ads, no tracking.

Tyvin is a simple intermittent fasting tracker that does one thing well: it helps you time your fasts. Everything stays on your iPhone.

START A FAST IN SECONDS
Pick a fasting protocol, start the timer and see at a glance how far along you are. A clear progress view shows your fasting and eating windows.

UNDERSTAND WHERE YOU ARE IN YOUR FAST
See which stage of your fast you're in as the hours pass, with a short, plain-language note about what is typically going on in the body at that point. No jargon, no noise.

WIDGETS ON YOUR HOME SCREEN
Check your fast without opening the app. Your current fasting or eating window is always one glance away.

SYNC YOUR WEIGHT WITH APPLE HEALTH
Log your weight and keep it in sync with the Health app. Tyvin only reads and writes your weight, nothing else.

FLEXIBLE WHEN LIFE ISN'T PERFECT
Forgot to start the timer or ended a fast earlier than planned? Just edit the start or end time afterwards.

REMINDERS THAT STAY OUT OF YOUR WAY
Get notifications when your fasting or eating window changes, so you don't need to keep checking the app.

HISTORY AND STREAKS
Browse your past fasts and see your week at a glance. Keep your streak going and spot your own patterns over time.

PRIVATE BY DESIGN
No registration, no cloud account, no analytics. Your data lives on your device. Export it any time, and import it back or bring it over from another app with the JSON import.

WHY TYVIN?
Many fasting apps lock basic features behind an expensive yearly subscription. Tyvin is built for people who just want a reliable timer: a single purchase, no recurring fees, no paywalls.

Tyvin is not a medical app and doesn't provide medical advice. Fasting stage information is general and for reference only. Individual experiences vary. Talk to your doctor before starting a fasting regimen, especially if you have a health condition, are pregnant or take medication.