Braintrust vs Celestial Sleep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Braintrust
This app uses cognitive science and AI to help users remember important information. It provides daily review questions and tracks progress, aiding those concerned about memory loss or caring for someone who is.
- Daily review questions
- Progress tracking
- Research-backed methods
- Mini-courses on topics
- Templates and examples
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OVERVIEW: Braintrust is an app that helps you remember the important things you need to know to enjoy a better life. It is built on research-backed Cognitive Science and Artificial Intelligence, and is trusted by some of the world’s highest performing teams. WHO IS BRAINTRUST FOR? Braintrust is for people who are worried about memory loss as well as people who care for someone with memory loss. HOW DOES BRAINTRUST WORK? Every day, you will receive a notification from braintrust to review 3 questions our app determines is important for you or your care recipient to review that day. Practice recalling those questions and earn points. You can also use braintrust to track your daily progress, and learn new things about topics of interest. DOWNLOAD BRAINTRUST TODAY AND ENJOY: 1. Full access to every feature of the braintrust app 2. A research-backed method to better remember important information 3. Several templates and examples of information to remember 4. A way to see your memory progress every day 5. Mini-courses on several topics SUBSCRIPTION PRICING AND TERMS: Braintrust is a free app. Read our Terms of Use here: https://www.trybraintrust.com/terms-ofuse Read our Privacy Policy here: https://www.trybraintrust.com/privacy-policy If you have any questions or need any support, please send us an email at support-braintrust@blankslatetech.co
Celestial Sleep
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This is a companion app for our contactless smart sleep products, which can be used to view sleep reports, set up abnormal alarm, and control heating and massage functions.
Screenshots
Verdict
The clearest difference is ads: Celestial Sleep at none against Braintrust's shown. On price, update cadence, 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
Both are free to download. Braintrust sells 2 in-app purchases, starting at $9.99 per month and Celestial Sleep sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Braintrust ships an update every 2 weeks, Celestial Sleep fortnightly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Braintrust | Celestial Sleep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (10 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 2 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 42 MB | 32 MB |
| Age rating | 17+ | 4+ |
| Developer | Blank Slate Technologies | Celestial, Inc. |
In-app purchases
Braintrust
- Subscription14 Days trial2 variants$9.991 Month
- Subscription$9.991 Month
Celestial Sleep
- Guardian (Month)$0.99
- Guardian (Quarter)$1.99
- Guardian (Year)$9.99









