Eight Sleep vs Onion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Eight Sleep
This advanced sleep system intelligently adjusts temperature and elevation for personalized comfort. It tracks detailed sleep metrics and provides insights to help you wake up refreshed. The system supports up to two users with individual profiles and learns over time.
- Personalized temperature control
- Automatic sleep stage tracking
- Heart rate and HRV monitoring
- Smart alarm with vibration
- Dual user sleep profiles
- AI-driven sleep insights
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Introducing Pod 6. The setup is as effortless as your sleep. Guided Hub setup gets you paired in minutes, a live priming screen decodes your Pod's lights in real time so you're never guessing, and Solo Pod owners get a path built just for them. Your best sleep starts tonight. The Eight Sleep Pod is the intelligent sleep system that gives you up to one hour more of sleep every night. It cools. It heats. It elevates. PERSONALIZED SLEEP WITH AUTOPILOT Autopilot is the intelligence behind the Pod. It adjusts your temperature and elevation to perfect your sleep experience. LEARN ABOUT YOUR SLEEP AND HEALTH View your sleep stages, time slept, heart rate, HRV, and snoring. Plus, receive personalized insights and recommendations. WAKE UP REFRESHED With customizable chest-level vibration and a gradual thermal change, you will wake up gently and feel fully refreshed. TWO SLEEP PROFILES PER POD Autopilot creates a profile for up to two individuals on the same Pod and refines overtime. Have questions? We’re here to help. Email us at support@eightsleep.com. Terms of Use: - www.eightsleep.com/app-terms-conditions/ - www.apple.com/legal/internet-services/itunes/dev/stdeula/
Onion
This app helps you track your moods and journal your thoughts with simple check-ins and customizable options. It offers visual insights into your emotional patterns and allows for private, device-stored entries with optional iCloud backup.
- Simple mood check-ins
- Personal journaling
- Mood calendar and charts
- Customizable moods and associations
- Optional daily reminders
- Device-only storage
- iCloud backup option
- Apple Health integration
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Make room for how you feel. Onion is a mood tracker and personal journal for easy check-ins, little notes, and a clearer view of your days. Pick a face that fits your mood. Add feelings, a tag, an association, or a thought if you want to. Come back when you feel like looking back. A SMALL CHECK-IN Choose your mood, add optional feelings, tags, associations, and a note, then save. Check in more than once a day or add an entry for a day you missed. Start from a Home Screen widget or a shortcut when a moment comes to mind. ROOM FOR YOUR WORDS Write a sentence or a longer reflection. Browse your journal by day, search feelings, notes, tags, and associations, and edit an entry when you have more to say. Share a saved check-in with a preview that lets you decide whether to include your feelings, note, and tags. SEE YOUR RECORDED PATTERNS Explore a mood calendar, charts, and a year in pixels. Compare logged days with and without a tag or association, then revisit the entries behind a pattern. These are observations from your journal, not explanations of what caused a mood. TAGS THAT ARE YOURS Add reusable tags for games, places, people, or anything else on your mind. Create one as you check in, pick it again later, and filter your journal by tag. Manage your tag library in Settings. FEELINGS IN YOUR OWN MIX Choose from all 38 Apple State of Mind feelings. Select any combination, including mixed feelings. Feelings are optional and are never inferred from your notes or mood rating. MAKE IT FEEL LIKE YOU Create custom moods and choose from 18 associations, including Friends, Work, Health, and Self-Care. Pick the Onion artwork or classic faces. Set an optional daily reminder at a time that works for you. YOUR JOURNAL, YOUR CHOICES No account to create. Entries are stored on your device. iCloud backup is on by default when available and uses your own private CloudKit database; you can turn it off in Settings and reopen Onion for the change to take effect. Turning it off does not remove existing cloud copies or change device backups. Onion has no developer-run server, advertising SDK, or tracking SDK. Use the optional device-authentication lock to limit access and hide entries in the app switcher. Export CSV or JSON copies, import a journal backup, or delete your entries in Settings. Shared copies remain wherever you send them. Optionally save check-ins with selected feelings and associations to Apple Health as State of Mind. Choose a momentary emotion or an overall daily mood. Check sharing status, retry pending changes, or explicitly send existing entries. Personal tags and notes stay out of Health. Onion does not read your Health data or detect changes you make there. Journal dates can appear in on-device search only if you turn that option on; notes, moods, and associations are not indexed, and journal search is unavailable while the app lock is enabled. FOR EVERYDAY REFLECTION For people who want a gentle mood diary without turning each check-in into a writing assignment. Onion is for personal reflection, not diagnosis or treatment. The interface is currently in English. Support: https://fussbunny.app/support/ Privacy: https://fussbunny.app/privacy/
Screenshots
Verdict
The clearest difference is review sentiment: Onion at 100% against Eight Sleep's 29%. Onion also leads on in-app purchases (none vs 2) and rating (5.0 vs 4.8). Eight Sleep's advantage is ratings volume (18K vs 1). On price, ads, device support and iOS requirement 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
Both are free to download. Eight Sleep sells 2 in-app purchases, starting at $18.99 per month. Onion asks for nothing beyond the download.
Onion holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Eight Sleep has 18K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 29% of Eight Sleep's written reviews are positive against 100% of Onion's.
Eight Sleep ships an update every 4 days, Onion every 2 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Eight Sleep | Onion |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (18K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 28.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 18K — better | 1 |
| Update frequency | Every 4 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 259 MB | 8 MB |
| Age rating | 12+ | 12+ |
| Developer | Eight Sleep, Inc | Keep It Beezy LLC |
Customer experience
Eight Sleep
Onion
Bugs and requests
Eight Sleep
Reported bugs
5 issues- App freezes and loses connection to pod
- Alarms not working or turning off properly
- Temperature settings not saving or resetting
- Sleep data not syncing or displaying accurately
- Frequent app crashes and performance issues
Requested features
5 requests- Apple Watch app integration
- Offline temperature/alarm controls
- Customizable sleep tracking and insights
- Improved alarm snooze/dismiss functionality
- Nap mode and more sleep schedule flexibility
Onion
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Eight Sleep
- 8+ Pro (Monthly)$18.991 Month
- 8+ Pro (Annual)$179.991 Year
Onion
No in-app purchases









