--- title: "Circadian Rhythm & Sleep: ARC - Reviews, Revenue and Downloads in United States | Apple App Store" description: "You are not lazy at 3pm. You are running on a clock nobody showed you. ARC works out the shape of your day — when your energy peaks, when it drops, and when a coffee stops being a good idea — then pl" --- # Circadian Rhythm & Sleep: ARC — United States > Energy, Caffeine & Body Clock ![Circadian Rhythm & Sleep: ARC App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/c6/2c/6a/c62c6a84-ad38-9f57-ebca-12b6a6b2367e/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Pritam Ghosh](https://apptail.io/developer/pritam-ghosh-PjDJDb) **Category:** Health Fitness **Rating:** 4.4/5 (8 ratings) **Price:** Free **Bundle ID:** com.prhub.arc **Store:** Apple App Store **Country:** United States **Version:** 2.0.1 (released 2026-10-03) **Original Release:** 2026-02-05 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6758214892) **AppTail Page:** [https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/united-states](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/united-states) ## Circadian Rhythm & Sleep: ARC Description You are not lazy at 3pm. You are running on a clock nobody showed you. ARC works out the shape of your day — when your energy peaks, when it drops, and when a coffee stops being a good idea — then plans around it. Not a generic routine. Yours, built from what you actually log. ONE ANSWER, NOT A DASHBOARD Open the app and there is one sentence explaining why you feel like this right now, and one thing worth doing about it. Underneath, the rest of your day as a plan you can work through. Nothing else competes for your attention. The plan is not a schedule. Log a walk and its block closes. Miss your morning light and a compensatory walk appears that was not there at breakfast. Report a low before the app expected one and the whole afternoon re-times. YOUR LAST SAFE COFFEE, ACTUALLY CALCULATED Most apps give you a rule of thumb. ARC solves for the latest moment a drink your size still clears your system before bed — from your bedtime, how fast you personally metabolise caffeine, and everything you have already had today. Two people with the same bedtime and the same cup can get cutoffs three hours apart. That is not a bug. That is the point. IT CHANGES ITS MIND ABOUT YOU You tell ARC when you crash. After about ten days of check-ins it stops taking your word for it and uses the hour you actually crash — and it tells you when the two turn out to differ. Everything timed around your dip moves with it. PROOF, NOT PROMISES The Trends tab is the receipt for everything the app has told you: your crashes per week, whether the number is falling, when your dip really lands, and what each habit changed. Every claim is built from your own check-ins and each one knows whether it has enough history to mean anything. When it does not, it says so instead of drawing a line through three points. ONE CHANGE, FIVE DAYS Every so often ARC proposes a single experiment — an earlier cutoff, light before nine, a walk before your dip — runs it for five days, and scores it against the fortnight before. "No difference" is one of the possible verdicts, and it is a real result: it takes something off your list for good. LEARN 23 briefings on light, caffeine, sleep and timing, in English and German. A reference you go to, not a feed pushed at you. WHAT IT DOES NOT DO No sleep score. No streaks. No badges. No congratulating you. The app will tell you that you slept badly; it will never tell you that you are doing badly. No account. No login. No wearable required. Your history lives on your phone. REQUIRES iPhone. Notifications are optional. Location is never requested — sunrise comes from your time zone. ARC is a wellness app. It is not a medical device and does not diagnose, treat or prevent anything. SUBSCRIPTION ARC Pro unlocks the full app after setup: the daily plan, the caffeine cutoff, Trends, the weekly experiments and Learn. • ARC Pro – Weekly: $4.99 per week • ARC Pro – Annual: $39.99 per year with 7 days free trial Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours of the end of the current period. You can manage or cancel your subscription in your Apple Account settings, or from Settings inside the app. Any unused portion of a free trial is forfeited when you buy a subscription. Privacy Policy: Terms of Use: ## Circadian Rhythm & Sleep: ARC Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/71/31/5c/71315c4f-414d-6c66-36f8-638de31daa99/01-knows-your-dip.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/40/59/73/4059733e-7570-ac95-6036-3d0d5027fc1b/02-schedule-drift.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4a/ff/90/4aff907c-0631-e5fa-7868-6e3db32c5c66/03-crashes-measured.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/0a/9e/e7/0a9ee759-4b12-ccae-3dce-d33edc2a8fa6/04-shows-its-working.png/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/2d/5a/f4/2d5af497-27de-76b8-fa32-f38d811172da/05-widgets.png/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ad/3a/16/ad3a1641-b378-8a9a-6ce9-859a1dc73819/06-two-levers.png/1242x2688.png) ## Circadian Rhythm & Sleep: ARC Rating Breakdown in United States - 5 stars: 6 (75%) - 4 stars: 1 (13%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 1 (13%) ## Circadian Rhythm & Sleep: ARC Reviews in United States ### *---- "Very strong subscription binding!" The autumn application strongly imposes its paid Subscription, which has a very negative impact on the experience of using the application. -- Element01, 2026-06-05 ### ***** "5 Stars for Potential" I’m giving this five stars for potential and because it serves a niche in the market that is very much needed. However, it is a bit off for me. I’m a wolf type. Already knew that. Being a wolf type my lifestyle is already built around my DSPD so my schedule does not configure to your typical 9-5. That being said, the app quiz still forced me to answer questions about peak energy and coffee timing based on a 9 to 5 schedule. I thought the whole idea of this app was that I would not have to answer questions as though I have a typical schedule. So for some reason, it thinks I have my first coffee at 3:30 AM, which is an hour before I told it I usually go to sleep. Seems like a bug? I also would like the ability to switch from UK (military) time to U.S. time. -- verbaldata, 2026-04-12 ### ***** "Know your body!" I must say I didn’t pay much attention to my circadian rhythm but it’s nice to know about how my body works and also what the optimal time it is to drink coffee and when to cut it off so it doesn’t affect my sleep. It’s a good little reminder to help stay in tune with your body! -- NotxJeff, 2026-02-17 ### ***** "Essential for a night shifter" As a night shifter trying to stay consistent has its ups and downs, where this maps out your day, when you shouldn’t have anymore caffeine and such to try and optimize your circadian rhythm. This isn’t JUST for night shifters and it’s for everyone. Even if you are on a standard 9-5. It helps people create better habits for longevity of a circadian rhythm. -- Uhhh Factual, 2026-02-07 [View all Circadian Rhythm & Sleep: ARC reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Circadian Rhythm & Sleep: ARC In-App Purchases | Item | Price | |------|-------| | ARC Weekly Pro | $4.99 | | ARC Yearly Pro | $29.99 | | ARC Monthly Pro | $9.99 | ## Apps Similar to Circadian Rhythm & Sleep: ARC - [Sonar - Health & Performance](https://apptail.io/app/sonar-health-performance-CZOb/united-states) - [Circadian: Your Natural Rhythm](https://apptail.io/app/circadian-your-natural-rhythm-WvQb/united-states) - [Peaks: Sleep & Energy](https://apptail.io/app/peaks-sleep-energy-auQm/united-states) - [FitBee Calorie & Macro Counter](https://apptail.io/app/fitbee-calorie-macro-counter-BOuo/united-states) - [Lifestack: AIプランナー＆健康](https://apptail.io/app/lifestack-ai-pxFp/united-states) - [MyCircadianApp](https://apptail.io/app/mycircadianapp-gBOt/united-states) - [Circadian Rhythm: Body Clock](https://apptail.io/app/circadian-rhythm-body-clock-Yaiu/united-states) - [FivePointFive: Breathwork](https://apptail.io/app/fivepointfive-breathwork-qQru/united-states) - [Supplements AI – Stack Tracker](https://apptail.io/app/supplements-ai-stack-tracker-wEXu/united-states) - [Purpose: AI Mentor & Coach](https://apptail.io/app/purpose-ai-mentor-coach-HrDw/united-states) ## Circadian Rhythm & Sleep: ARC Available In - [United States](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/united-states) - [Australia](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/australia) - [Belarus](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/belarus) - [Czechia](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/czechia) - [Ecuador](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/ecuador) - [Hungary](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/hungary) - [Italy](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/italy) - [Armenia](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/armenia) - [Cayman Islands](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/cayman-islands) - [Sri Lanka](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/sri-lanka) - [Mexico](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/mexico) - [Nepal](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/nepal) - [Russia](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/russia) - [Singapore](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/singapore) - [Kuwait](https://apptail.io/app/circadian-rhythm-sleep-arc-Thzy/kuwait) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*