0h
Digestion
Glucose and insulin rise after a meal; your body runs on what you just ate.
Source in KYNIO Pro
Android · Web
Fasting,
without the hype.
KYNIO is a calm intermittent fasting tracker. See the phase your body is likely in, with the studies behind it, log meals with a photo, and keep your logs on your phone.
Estimated, with sources
Six phases.
Each with its sources.
Phases are estimated from the time since your last meal. Bodies differ, so KYNIO shows what studies observed, and where the evidence is still thin.
13:12:41
Fat burning
13h 12m elapsed · 2h 47m remaining
4h
Glucose burn
Insulin falls and the liver releases stored glycogen.
Source in KYNIO Pro
12h
Fat burning
As liver glycogen drops, fat becomes a bigger share of fuel.
Source in KYNIO Pro
18h
Ketosis
The liver makes more ketones. When it starts varies a lot between people.
Source in KYNIO Pro
24h
Autophagy
Fasting likely increases it, but its exact start hasn't been measured directly in humans; the 24 h+ estimate comes mostly from animal studies.
Source in KYNIO Pro
48h
Deep renewal
Longer fasts and fasting-mimicking diets have been tested in clinical trials. The results are promising and the research continues.
Source in KYNIO Pro
Estimates, not promises. Long fasts need medical guidance. What happens in each phase
Features
A timer, a log
and nothing to hide.
Everything you need to fast with consistency, without pressure or guesswork.
01
Phases with sources
See the estimated phase as it happens. With Pro, each phase opens its biology and the studies behind it.
02Meals by photo, estimates you can edit
Snap or describe a meal and review calories and macros before saving. 3 a day free.
03Streaks that forgive
Miss a day and your streak survives. No guilt trips, no mandatory calorie targets.
04Your logs stay on your phone
No account needed, no ads. Export or delete everything in one tap. Meal photos go to an AI service for analysis, and KYNIO doesn't keep them.
App screens
Real screenshots.
No makeup.
drag to explore →
Free & Pro
Free for the essentials.
Pro for the rest.
| Feature | Free | Pro |
|---|---|---|
| Protocols | 16:8, 18:6, 20:4 | + OMAD, 36 h, 48 h, open fast |
| Phases | Estimated timeline | + biology, benefits and tips |
| AI meal analysis | 3 a day | Unlimited |
| Streak | 1 grace day | + 2 shields a month |
| Also | Water, weight, workouts, XP | Cloud sync, PDF report, themes |
Pro is monthly, annual, or a one-time lifetime purchase.
Questions
Straight answers.
Is KYNIO free?
Yes for 16:8, 18:6 and 20:4, the phase timeline, water, weight, workouts and 3 meal analyses a day. Pro unlocks the rest: monthly, annually or as a one-time lifetime purchase.
Do I need an account?
No. Your logs are stored on your device. Cloud sync with a Google account is optional (Pro).
How accurate are the phases?
They're estimates based on the time since your last meal. Each phase lists the studies it's based on, and their limits.
How accurate is the meal analysis?
It's an AI estimate: good for clearly visible foods, weaker for sauces and mixed dishes. You can edit every value before saving.
Is this medical advice?
No. Talk to a doctor before fasting if you're under 18, pregnant or breastfeeding, have diabetes or take glucose-lowering medication, or have a history of eating disorders.
Does it work on iPhone?
Yes, through the web version. Open kynioapp.com/app in Safari; it also runs in Chrome, Edge and Firefox. The native app is Android only.
Android · Web
Start with
one 16:8.
Free on Android. No account needed.