
ARC: Circadian Rhythm Tracker
Energy, Sleep & Caffeine Timer
Free · In‑App Purchases · Designed for iPad
15-Point Precision Diagnosis. Discover your chronotype in 60 seconds. Know exactly when to focus, when to stop caffeine, and when to sleep.
Stop fighting your biology. ARC is the ultimate Circadian OS designed to align your work, caffeine, and light exposure with your natural chronotype.
Experience the science of peak performance. Based on the protocols of Dr. Andrew Huberman and Matthew Walker, ARC helps you master your energy, eliminate the afternoon crash, and reclaim your focus.
WHY ARC?
Most productivity apps assume everyone follows the same 9-to-5 clock. ARC is different. It diagnoses your unique biological rhythm and provides a high-precision "Daily Trajectory" tailored to your DNA.
KEY FEATURES:
• 15-Point Precision Diagnosis: Our new onboarding asks the right questions to calibrate your rhythm with medical-grade accuracy.
• The Bio-Diagnosis: Identify if you are a Lion, Bear, Wolf, or Dolphin chronotype.
• Circadian Compass: A real-time visual map of your current energy state (Peak, Dip, or Recovery).
• Caffeine Half-Life Tracker: Know exactly when your coffee will leave your system to protect your sleep.
• Photon Latency Nudges: Get alerted for the optimal morning sunlight window to set your internal clock.
• Energy-Based Missions: Schedule your deep work during peak focus and your admin tasks during natural dips.
SCIENCE-BACKED RESULTS:
• Eliminate the "2 PM Wall" without extra caffeine.
• Fall asleep faster by timing your wind-down missions.
• Achieve states of "Deep Flow" by working with your brain chemistry, not against it.
Join thousands of high-performers, biohackers, and deep workers who are syncing their lives with their biology.
STOP FIGHTING YOUR BIOLOGY. START WORKING WITH IT.
Download ARC today and discover what it feels like to live in sync with your natural rhythm.
SUBSCRIPTION PRICING
ARC Pro is available as:
Weekly: $3.99/week
Monthly: $9.99/month
Yearly: $29.99/year (Best Value - Save 75%)
All plans include a 3-day free trial. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage subscriptions in your App Store account settings.
Privacy Policy: https://www.notion.so/Privacy-Policy-for-ARC-Sync-Your-Life-2f2af72016c9802bace6fddd4a1ed526
Terms of Service: https://www.notion.so/Terms-of-Service-for-ARC-Sync-Your-Life-2f2af72016c980c8be7be0bacf1ee076
Your circadian library just got a serious upgrade.
New Intel Drops:
• Social Jetlag — why sleeping in on weekends wrecks your Monday
• NSDR: The Reset Button — restore dopamine in 10 minutes, no caffeine
• Temperature Minimum — your body's secret clock-shifting hack
• Blue Light: The Real Truth — it's not what the internet told you
• Your Chronotype Is Genetic — you're not lazy, you're wired differently
• Meal Timing > Calorie Counting — your gut has its own clock
• Exercise As A Time Signal — movement anchors your rhythm
• The 90-Minute Sleep Cycle — why you wake up groggy
• Night Shift Survival Guide — protecting your clock while working against it
• Dopamine & Morning Light — the motivation molecule needs photons
Night Shift Intelligence:
• Fixed schedule alignment for night shift workers
• Smarter notification timing anchored to YOUR actual day
• Logs tab now shows "Night Shift Protocol" with adjusted wake time
Sun Button Fix:
• Resolved tap responsiveness on the sunlight logging button
• Improved feedback for chronotypes without a dedicated sunlight block
The developer, Pritam Ghosh, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Pritam Ghosh
- Size
- 49.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- ARC Yearly Pro $29.99
- ARC Weekly Pro $3.99
- ARC Monthly Pro $9.99
- Copyright
- © 2026 Pritam Ghosh