Comparison

AcornSleep vs Usay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AcornSleep

Read full description

Welcome to AcornSleep, a custom R90 sleep cycle recording tool based on Sleep by Nick Ritterhales, a better way to improve sleep and redefine rest. 8 hours is actually the average sleep time per person per night, but it is not a generally applicable recommended sleep time. Blindly chasing 8 hours and creating a lot of pressure has a very destructive and counterproductive effect on sleep. We need different sleep hours from person to person. No supplements, new mattresses or equipment are required. All it takes is your smartphone, plus our AI-powered software to work with you to come up with customized tips and recommendations to personalize your sleep journey for better rest. 4 Reasons You'll Love Sleep Cycle. 1. Total Privacy - AutoSleep has no user analytics tracking, No third-party code, No data uploaded. 2. Abundant Customization Tips - A large number of rest suggestions customized for you based on your sleep cycle registration information, daily schedule and mobile phone usage frequency. 3. No additional equipment - Just turn on your phone every morning and record how you slept last night, the AI assistant will provide you with customized advice. 4. More Ambient Noise for Sleep - Ability to make your own personal mix of sounds so you get just the right amount of ambient noise. A good night's sleep isn't always easy to find, but it's the key to many things in your life. Stop mistreating yourself and those around you. Stop accepting the fatigue and lack of energy you've been feeling. Use AcornSleep to achieve the calm you need. Whatever you're doing right now, I want you to imagine the two of us on that island, trying to keep in sync with that biological process that's been around since the dawn of man. This is our ideal life. Every step we take—however small—to improve our sleep should bring us closer to the kind of life we’re sitting around the campfire. - Please do not rely on AcornSleep for medical advice or diagnosis. AcornSleep is not intended to replace or replace professional medical care. - If you have any medical problems, or before starting any exercise program, please consult your physician. Do not adjust your medicines yourself.

About

Usay

This app offers a silent companion for self-reflection, tracking emotional states, mental fluctuations, and energy rhythms. It uses advanced physiological sensing to help manage stress, improve sleep, and monitor energy levels, blending seamlessly into daily life.

Highlights
  • Emotional state observation
  • Mental fluctuation tracking
  • Energy rhythm monitoring
  • Stress management
  • Sleep improvement
  • Physiological sensing
Features
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In a world of constant noise, USAY quietly observes your emotional states, mental fluctuations, and energy rhythms, providing gentle guidance without interruption. Reconnect with yourself through advanced physiological sensing and human-centered design, ensuring technology serves your emotions, understanding, and companionship. Experience a feather-light, silent companion that helps you manage stress, improve sleep, and track your energy, all while blending seamlessly into your life. This is a consumer wellness wearable device, not a medical device. Heart rate, sleep, and stress data are for daily reference only.Not intended for medical diagnosis, treatment, or prevention. Always consult a qualified medical professional before making medical decisions.

Screenshots

AcornSleep4 screens
Usay4 screens

Verdict

The call

The clearest difference is update cadence: AcornSleep at every 10 days against Usay's every 3 weeks. AcornSleep also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AcornSleep ships an update every 10 days, Usay every 3 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
AcornSleep versus Usay: the parameters behind the verdict, then further details
ParameterAcornSleepUsay
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size78 MB162 MB
Age rating4+17+
DeveloperCanoe LLCFison Health Co., Limited

In-app purchases

None

AcornSleep

No in-app purchases

None

Usay

No in-app purchases

Questions

Is AcornSleep free?
AcornSleep is free to download, with no in-app purchases.
Is Usay free?
Usay is free to download, with no in-app purchases.
Do AcornSleep or Usay have ads?
Neither AcornSleep nor Usay shows ads.
Which is updated more often, AcornSleep or Usay?
AcornSleep ships an update every 10 days, and Usay every 3 weeks. Most recently, AcornSleep was updated on November 7, 2026 and Usay on October 31, 2026.

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