Sunfold: Intermittent Fasting
16:8 fasting timer & phases
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
A calm fasting timer that stays on your phone. No account, no ads, no feed — just the ring, your streak, and what your body is doing at hour 14.
Sunfold is a quiet, warm intermittent fasting tracker. One ring, one number, and
everything you need to know about where you are in your fast.
THE TIMER
Start when you finish your last meal. Sunfold counts from that moment — close the
app, restart your phone, the timer never drifts. A full-screen ring shows how far
along you are, and the metabolic phases are marked around it.
SCHEDULES
16:8, 18:6, 20:4, 5:2, or set your own length from 4 to 48 hours. Change your
schedule mid-fast and the goal moves with you — no need to start over.
METABOLIC PHASES
Watch your fast move from the fed state through early fasting, fat burning,
ketosis and autophagy, with a plain-language explanation of each. Timings are
presented as approximations, because that is what they are.
HISTORY
A streak calendar, total hours, average length, and every fast you have recorded.
Add a note and how the fast felt.
WEIGHT
Optional. Log your weight, see the trend. No goal weight, no BMI, no judgement.
WIDGETS AND DYNAMIC ISLAND
Your timer on the Home Screen, the Lock Screen, and in the Dynamic Island as a
Live Activity, ticking without draining your battery.
REMINDERS
When your fast is complete, thirty minutes before, and when your eating window
closes. All scheduled locally — Sunfold has no push server.
PRIVACY
No account. No sign-in. No analytics, no advertising, no tracking. Everything you
record stays on your device, and you can export it all as CSV or delete it in one
tap.
SUNFOLD PRO
Free forever: the 16:8 schedule and the last seven days of history. Pro unlocks
every schedule, unlimited history, charts, the metabolic phases and widgets.
$2.99/month, $14.99/year, or $34.99 once.
Payment is charged to your Apple ID. Subscriptions renew automatically unless
cancelled at least 24 hours before the period ends, and can be managed in App
Store settings at any time.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://sanchizas007.github.io/Sunfold/privacy/
IMPORTANT
Sunfold is a timer and a journal, not a medical device. It does not diagnose,
treat or give medical advice. Talk to a doctor before fasting if you are pregnant
or breastfeeding, under 18, living with diabetes or taking medication that
affects blood sugar, taking medicine that must be taken with food, underweight,
or living with a chronic condition. If you have or have had an eating disorder,
please seek support before using a fasting app.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Olexandr Zhovnir, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Olexandr Zhovnir
- Size
- 11 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 2 more
- English, Russian, Ukrainian
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Sunfold Pro — Monthly $2.99
- Sunfold Pro — Yearly $12.99
- Sunfold Pro — Lifetime $34.99
- Copyright
- © 2026 Olexandr Zhovnir