Quick Answer: Rise App models your recent sleep to predict hourly energy peaks and dips, costing about $69.99/year at the time of writing. ARC uses a 22-step setup to plan your day (a morning light timer, a live caffeine decay curve, your peak and dip), then measures your real afternoon dip from your own check-ins. It costs $39.99/year (7-day free trial) or $4.99/week, and your log stays on your iPhone. Disclosure: we make ARC.
Rise Science is a venture-backed company focused on sleep and energy. ARC is a lean, focused competitor built by a founder who got obsessed with chronobiology. Both apps make serious claims about circadian science. Here is the honest comparison.
How Rise Works#
Rise uses your sleep history (pulled from Apple Health or entered manually) to calculate your personal circadian rhythm. From that, it generates an Energy Schedule — a timeline showing your predicted energy peaks, dips, and recovery windows throughout the day.
The Energy Schedule visualization is genuinely well-designed. It gives you a birds-eye view of when you will be at your best and when to expect the dip. Rise also has a Sleep Need feature that calculates your personal sleep debt and how many hours you need to pay it back.
How ARC Works#
ARC starts with a 22-step setup that asks about your sleep, energy, caffeine habits and work schedule from scratch, rather than relying on historical Apple Health data (ARC doesn't read Apple Health at all). That gives new users a usable chronotype and plan on day one.
ARC lays out your day as phases (light window, peak, dip, cutoff, wind-down). Log a short night and its sleep-debt recovery loop adjusts the day's ask and cutoff. Then it checks itself: after about ten days of one-tap energy check-ins, ARC measures when your afternoon dip really lands and corrects the window you picked. Five-day experiments test one habit at a time, and "no difference" is an allowed result.
Key Differences#
Onboarding: Rise models your energy from your recent sleep (from your phone or Apple Health). ARC builds your profile from a structured 22-step setup — no historical data needed: you get a usable day plan immediately, and after about ten days of one-tap energy check-ins ARC measures when your dip really lands and corrects the window you picked.
Caffeine tracking: ARC has a live caffeine decay tracker with mg-level monitoring and a last-safe-coffee time that moves with every drink (try the math in the free caffeine calculator). Rise gives you a caffeine cutoff reminder; at the time of writing it doesn't log drinks or show the milligrams still in your system.
Morning light: Rise reminds you to get bright light; ARC computes today's sunrise from your time zone and runs a 20-minute timer in the Dynamic Island.
Daily adaptability: every drink you log moves your caffeine cutoff immediately, and a short night starts a recovery loop.
Notifications: ARC sends chronotype-aware notifications (coffee window, caffeine cutoff, wind-down). Rise has its own reminders.
Privacy: ARC needs no account, and your log stays on your iPhone.
Price: Rise costs about $69.99/year at the time of writing. ARC costs $39.99/year (7-day free trial) — about 40% less — or $4.99/week.
Where Rise Wins#
Rise's sleep debt feature is more sophisticated than anything ARC currently offers. If understanding your cumulative sleep deficit is important to you, Rise's Sleep Need calculation is excellent (for a quick estimate, try our free sleep debt calculator). The UI is also more polished and has a cleaner onboarding for users already embedded in the Apple ecosystem.
Where ARC Wins#
ARC wins on caffeine math, morning light timing, measuring your real dip, privacy, and price. ARC gives you a working plan on day one and then checks it against your own check-ins, so a wrong guess about your afternoon doesn't stay wrong.
The Verdict#
If you are already tracking sleep with an Apple Watch and want energy predictions based on your history: Rise is worth considering. If you want a daily plan — including caffeine tracking, morning light timing and a dip measured from your own days — for about 40% less: ARC is the better choice. For the wider field, see the best circadian rhythm apps ranking.