Circa Weight Loss & Fasting
Intermittent Fasts Tracker
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Fast with less stress using a beautiful timer, five proven protocols, Apple Health sync, and private on device data that stays yours
Circa — Intermittent fasting, beautifully simple.
• Circa is a focused intermittent fasting tracker for iPhone, built natively for iOS 26 with SwiftUI and Liquid Glass. It does one thing exceptionally well: it tells you whether you're fasting, how long is left, and what you've done this week — without buried menus, paywalled timers, or noisy nutrition advice.
• A timer that respects your day
Start, pause, resume, or end a fast in a single tap. Adjust your start or end time after the fact when life gets in the way. The dashboard shows your current state, progress toward your window, and elapsed time at a glance.
• Five protocols, plus your own
Choose from 14:10, 16:8, 18:6, 20:4 or OMAD — or build a custom protocol by the hour. Switch any time without losing your history.
• Designed around the circadian rhythm
The visual identity follows the cycle of night, sunrise, and day. Soft MeshGradient backgrounds shift with your fasting state, and Liquid Glass is applied with restraint to controls and navigation — never as decoration over your content.
• Apple Health, both ways
Log your weight in kilograms or pounds and Circa writes it to Apple Health. Weight you add elsewhere — a smart scale, the Health app, another tracker — flows back into Circa automatically. Unit preference is auto-detected from your region and fully overridable.
• Your data, on your device
Everything lives locally with SwiftData and syncs privately across your devices through your own iCloud account. No required account. No external backend. No social feed.
• Built for everyone
Full Dynamic Type support, VoiceOver labels throughout, Reduce Motion respected, and high-contrast colors. Localized in English, Spanish (Spain and Latin America), French, German, Italian, Portuguese (Brazil), Russian, Japanese, Korean, Simplified and Traditional Chinese, Danish, Swedish, and Turkish.
• Thoughtful notifications
Local reminders for the end of your fast, eating windows, and weekly weight check-ins — never spammy, always controllable from Settings.
• Circa Premium
A monthly or yearly subscription unlocks advanced statistics, guided 7/14/30-day plans and motivational push notifications. A free trial is available on the monthly and yearly plan. The core timer, history, and Apple Health integration are free, forever — Premium is for people who want to go deeper, not a tax for using the basics.
• A note on health
Circa is a tracking tool, not medical advice. If you have a medical condition, are pregnant, or take medication, talk to a healthcare professional before changing your eating patterns.
LEGAL:
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.marcn.app/privacy
Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID Settings.
Faster startup and smoother scrolling, even with large weight histories. Weight charts now load and respond more quickly throughout the app and in widgets.
The developer, Marcelo Nardone, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Marcelo Nardone
- Size
- 28.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.4 or later.
- iPhone
Requires iOS 26.4 or later. - Mac
Requires macOS 26.4 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 19 more
- English, Czech, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Slovenian, Spanish, Swedish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Annual Best Value $29.99
- Flex Monthly Plan $4.99
- Forever Unlock $69.99
- Copyright
- © MarcN Apps