KetoAir vs Forever App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KetoAir
This device and companion app help you monitor your body's fat-burning status by measuring acetone levels in your breath. Get instant, accurate results to understand how your diet and exercise affect your ketosis.
- Instant breath acetone measurement
- Accurate real acetone sensor
- Bluetooth device connectivity
- Log ketosis records
- Monitor fat-burning status
- Track diet and exercise impact
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KetoAir is a breathlayzer that provides accurate and instant results in just a single blow. KetoAir Breathlayzer: •Accurate, real acetone sensor •Quick and easy - Just a single blow, get the result in seconds •Test anytime and anywhere •Keep yourself monitored and motivated, helping you to sustain your perseverance KetoAir App: •Log your ketosis record •Connect the device via Bluetooth Introducing the KetoAir Breathalyzer - the perfect tool for health and wellness conscious individuals who are looking to optimize their ketosis state and body fat burning rate! This pocket-sized breathalyzer provides accurate and instant results in just a single blow, giving you the ability to monitor how different foods affect your ketone level. By measuring the level of acetone in your breath, which is produced by the liver during the process of ketone energy formation, you can determine your body's fat burning status and adjust your diet accordingly. Without pain, you can test your ketone levels anytime and anywhere, keeping yourself motivated to reach your optimal ketosis state and fat burning rate. Plus, breath acetone levels can be influenced by certain body measurements, such as body composition and exercise, giving you even more insight into your overall health and wellness. No more guessing on your body's fat burning potential. Take control of your health and wellness with the KetoAir Breathalyzer. Check out the weight management reference article to learn more about how breath acetone and body measurements are related and how you can optimize your ketosis state for maximum fat burning potential. Disclaimer: Always seek a doctor’s advice in addition to using this app and before making any medical decisions. The KetoAir device has registered with the U.S. Food and Drug Administration as Class 1 medical device. Weight management reference article: https://onlinelibrary.wiley.com/share/7GUVTR5WWPWNCY9KPIYE?target=10.1002/oby.21242
Forever App
Monitor your banked stem cells, manage your storage subscription, and access the latest in regenerative medicine. View your cell collection details, read curated articles, and update your profile. Refer friends to earn rewards.
- Monitor banked stem cells
- Manage storage subscription
- View cell collection details
- Read regenerative medicine articles
- Update personal information
- Refer friends for rewards
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Forever App — Your Stem Cell Dashboard Forever App is the companion app for Forever Labs members. Monitor your banked stem cells, manage your storage subscription, and stay up to date on the latest in regenerative medicine — all from your phone. Your Cells, At a Glance View your stem cell collection details including your cellfie, sample identifiers, storage facility location, and procedure date. Everything about your banked cells in one place. Stay Informed Browse articles on stem cell science, regenerative medicine breakthroughs, and longevity research — curated by the Forever Labs team and readable right in the app. Manage Your Membership View your storage subscription, update payment methods, add a credit card or connect a bank account, review payment history, and download receipts. Update Your Profile Keep your personal information and address current so your records are always accurate. Share the Future Refer friends and family with your unique referral code and earn rewards. Forever Labs has been banking stem cells since 2015 at our ISO-certified biorepository in Ann Arbor, Michigan. We believe your younger cells are one of the most valuable health assets you have — and they're only getting older. Learn more at foreverlabs.com
Screenshots
Verdict
The clearest difference is rating: Forever App at 5.0 against KetoAir's 1.5. On price, ratings volume, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
Forever App holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | KetoAir | Forever App |
|---|---|---|
| Price | Free | Free |
| Rating | 1.5 (2 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 60 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Qi Diagnostics Limited | Forever Labs, Inc. |
Customer experience
KetoAir
Forever App
In-app purchases
KetoAir
No in-app purchases
Forever App
No in-app purchases









