Features Hub
Your body runs on rhythms.
Arcashift is the playlist.
Sleep, eat, move, caffeinate—your body notices when you do all of it. We help you nail the timing so life runs smoother (and you feel way less sleepy).
Stop jet lag before it starts
Crossing time zones? Don’t lose half your trip to brain fog. Our Jet Lag Planner builds you a step-by-step game plan—from light exposure to naps—so you land ready to explore, not ready to collapse.
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Science-backed timing for light, sleep, and caffeine
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Customizable adjustment styles
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Real-time progress tracking
The perfect nap, every time
Shift work or late nights don’t have to mean dragging through the day. Arcashift tells you the best time and length for your nap so you wake up refreshed, not foggy.
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Power naps that boost energy and alertness
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Prevents oversleeping and grogginess
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Fits right into your schedule
Sleep tracker & charts that actually make sense
Ever wonder why you’re exhausted at 3 PM but wide awake at midnight? Our charts don’t just tell you when you slept—they help you see your rhythm.
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Alignment chart: shows how well your schedule matches your body's internal clock
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Sleep chart: track sleep quality and timing without a wearable
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Activity chart: visualize movement and energy across the day
Know when to stop caffeine
Coffee = friend. Coffee at the wrong time = frenemy. Arcashift tells you exactly when to cut the caffeine so your latte doesn’t stalk you into bedtime. Your future well-rested self says thanks.
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Interactive tool to preview how caffeine impacts tonight’s sleep
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Smart reminders for your cutoff time
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Stay energized without sabotaging your rest
Meal timing that works with your body
Yup, your stomach has an internal clock too. Eating in sync with your circadian rhythm means better energy, digestion, and sleep. We’ll let you know the best times to fuel up—so your body actually listens.
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Circadian-aligned eating times
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Avoid late-night snacking that disrupts rest
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Helps regulate energy throughout the day
We could tell you it works, but the reviews do it better.
We have proof.
See how Arcashift is actually helping people.
“Arcashift made a difference in my sleep quality within 1 week by making me very aware of the effects of bright light (and any light) on my sleep cycle.”
– Ryan, Scientific Editor
“Arcashift is really helping a lot… being careful to follow the light exposure is really making a difference.”
– Joe, Software Developer
“I really rely on Arcashift when I am on night shift for my sleep schedule”
– Lauren, Pediatric Nurse
Download the app for iOS and Android
Tired of fighting your body’s clock? Arcashift helps you finally get on the same page.
Arcashift FAQs
Arcashift is a science-backed app that helps you sleep better, feel more energized, and align your schedule with your body’s internal clock—aka your circadian rhythm. Whether you're a shift worker, a night owl, or just someone tired of feeling tired, Arcashift helps you get in sync.
Arcashift uses your recent sleep and activity patterns to estimate your circadian rhythm. It then provides personalized recommendations—including ideal sleep times, caffeine cutoffs, eating windows, and light exposure—to help you feel and function better throughout the day.
Arcashift is built for anyone struggling with inconsistent sleep—but especially:
- Shift workers (nurses, first responders, IT specialists, etc.)
- People with irregular schedules or jet lag
- Health-conscious users trying to optimize energy and wellness
- Anyone curious about circadian rhythms and better sleep
Some of our most-loved features:
- Nap Planner: Tells you the best time to nap for energy without grogginess.
- Jet Lag Planner: Stop jet lag before it starts.
- Caffeine Calculator: See how that coffee at 3pm might mess with your 10pm bedtime.
- Eating Window Guide: Helps you time your meals to support better sleep and digestion.
- Light Exposure Tips: Shows when to seek or avoid light to shift your rhythm.
Nope. Arcashift can sync with Apple Health and other wearables to pull in your sleep and activity data automatically. You can also log things manually if you prefer.
Most sleep apps track what you do. Arcashift helps you understand when to do it. We’re built on circadian science, not just sleep duration. That means smarter timing for everything from naps to meals to caffeine.
Yes! You can get started with our core features for free. For access to premium tools like the caffeine calculator and calendar sync, we offer a paid subscription.
Our algorithms are built by scientists who specialize in circadian rhythms, including our CEO Olivia Walch, PhD. We combine validated circadian models with your real-world data to give personalized, research-based guidance.