ARC for Sleep Seekers
Better timing for Sleep Seekers
Still tired after 8 hours? Often it's timing, not just hours. ARC works on your mornings, caffeine and wind-down. If it persists, check with a doctor.
Download on theApp StoreThe Problem
- ✕Waking up groggy despite 8 hours of sleep
- ✕Weekend lie-ins that make Monday worse
- ✕Inconsistent bedtimes that ruin the week
- ✕Anxiety about not being able to fall asleep
How ARC Helps
ARC focuses on what you do while you're awake (morning light, caffeine timing, a steady wind-down), because those set when you get sleepy.
Key Features
- ✓Log last night's sleep; after a short night, ARC adjusts the next few days
- ✓20-minute morning light timer from your real sunrise
- ✓Chronotype-aware wind-down reminder
- ✓One sentence a day explaining why you feel the way you do
Why Timing Matters
Two things decide when you get sleepy: sleep pressure, which builds while you're awake, and your body clock, which is set mostly by light. Morning light pulls the clock earlier, caffeine late in the day masks sleep pressure, and a bright evening pushes the clock later. The Two-Process Model explains how the two fit together.
If you wake up tired even after a full night, this post on sleep inertia covers the usual causes.
A Week with ARC
Each morning, about 20 minutes outside: ARC's timer starts from your real sunrise and runs on your Lock Screen. Your last safe coffee updates with every cup, and a wind-down reminder lands before your bedtime.
Log last night's sleep, and after a short night ARC adjusts the day plan and caffeine cutoff for up to three days, rather than leaving you to chase it with extra coffee. To see how much you're carrying, try the free sleep debt calculator.
When to See a Doctor
Persistent tiredness has medical causes too, including sleep apnea, thyroid problems, anaemia and depression. If you snore loudly, wake gasping, or feel exhausted most days despite enough sleep, talk to a doctor. Don't change any sleep medication without talking to your doctor first.
Measure Your Sleep Debt
Sleeping 8 hours but still tired? Add up your recent nights to see how much sleep debt you're carrying.
Questions from Sleep Seekers
Does ARC track my sleep?▼
Not automatically, and there's no sleep score (here's why we removed it). You log hours and quality in a tap, and ARC uses that to adjust the next few days. It doesn't read Apple Health or a watch.
Will ARC fix insomnia?▼
No. It's a wellness app. If you have trouble sleeping at least three nights a week for three months, talk to a doctor: cognitive behavioural therapy for insomnia (CBT-I) is the first-line treatment.
Where is my data stored?▼
Your log stays on your iPhone. No account. The one exception is the daily sentence: to write it, ARC sends a short timing summary (wake time, bedtime, dip time and today's caffeine) to a language model.
ARC is a wellness app, not a medical device. If sleep problems persist, talk to a doctor.