KetoAir vs ECHO Water
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
ECHO Water
This app provides a streamlined and dependable interface for operating your Echo Flask. It offers a simplified user experience for managing hydrogen water generation.
- Simplified operation
- Reliable performance
- Echo Flask management
- Hydrogen water generation
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We rebuilt the ECHO Water app from the ground up to deliver a simpler, more reliable way to use your Echo Flask.
Screenshots
Verdict
The clearest difference is rating: ECHO Water at 4.6 against KetoAir's 1.5. ECHO Water also leads on ratings volume (141 vs 2) and update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model 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.
ECHO Water holds the better App Store score, 4.6 against 1.5. That said, the two scores are not equally well evidenced: ECHO Water has 141 ratings behind it against 2, so its average is the more settled of the two.
KetoAir ships an update every 2 months, ECHO Water every 3 weeks. The most recent releases landed on October 6, 2026 and October 28, 2026 respectively.
| Parameter | KetoAir | ECHO Water |
|---|---|---|
| Price | Free | Free |
| Rating | 1.5 (2 ratings) | 4.6 (141 ratings) — better |
| Positive reviews | — | 20.7% of reviews |
| Number of ratings | 2 | 141 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 60 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Qi Diagnostics Limited | Echo Water |
Customer experience
KetoAir
ECHO Water
Bugs and requests
KetoAir
Not enough reviews yet to summarise bugs or requests.
ECHO Water
Reported bugs
3 issues- App unable to sync with water bottle
- Inconsistent flask counting
- Bluetooth pairing problems
Requested features
3 requests- Ability to manually log water intake
- Scheduling options for hydrogen water
- Improved app performance and stability
In-app purchases
KetoAir
No in-app purchases
ECHO Water
No in-app purchases
