Fasting timer with a live progress ring
Intermittent fasting only works if you actually know where you are in the window. Theron's fasting timer runs a live ring showing elapsed and remaining time, so you're never guessing whether you're at hour 12 or hour 16.
Try the fasting timer freeWhy a visual timer matters for fasting adherence
Fasting protocols fail most often from ambiguity — not knowing exactly when the window opened or how much longer it runs. A live visual ring removes the mental math, which is often the difference between sticking to a 16:8 schedule and quietly drifting off it.
How the fasting timer works
Start your fast
Tap to begin — the timer logs the exact start time.
Watch the live ring
See elapsed time and time remaining update continuously, not just a static countdown.
Get notified at milestones
Know when you cross key fasting-state windows.
End and log
Close the fast and it saves to your fasting history alongside your nutrition data.
Always current status
No mental math on how long you've been fasting.
Flexible schedules
Works with 16:8, 18:6, OMAD, or any custom fasting window.
Fasting history
Track consistency over weeks, not just a single fast.
Integrated with nutrition tracking
Fasting and eating windows sit alongside your macro data in one app.
Who uses the fasting timer
Intermittent fasting practitioners
Anyone running a consistent daily eating window.
Fat loss phases
People combining a fasting protocol with a calorie deficit.
Metabolic health tracking
Users monitoring fasting consistency as part of a broader health routine.
Related features
Fasting timer — common questions
Can I set a custom fasting schedule?▾
Does it track my fasting history?▾
Does fasting data connect to my nutrition log?▾
Get in touch
Questions about Theron, partnership inquiries, or just want to say hi — we respond within 24–48 hours.