Ketonix vs WeighSync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ketonix
This app measures and analyzes breath ketone data from a connected Bluetooth device. It displays trendlines, moving averages, and allows for annotations of lifestyle changes to track progress. Video guides are available for various functions.
- Measure breath ketone data
- Analyze ketone trends
- Display moving averages
- Add lifestyle annotations
- Register Bluetooth device
- Create user profiles
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Ketonix Software for measure and analyze breath ketone data from a Ketonix® Bluetooth® device. The charts will display a trendline, moving average (MAV) and a possibility to add annotations for lifestyle changes. Here are some video guides demonstrating functions of the app. Register Device https://youtu.be/fnBHSOcu91Y Quickstart https://youtu.be/DdULLGAjd14 Create Profile https://youtu.be/5-xRkqU4ap0 Diet Workflow https://youtu.be/L-u04j_Wbgw Import Recipe https://youtu.be/vV1Z2hKfOX4 Privacy Policy is found at https://www.ketonix.com/PrivacyPolicyKetonixBluetoothApp.pdf
WeighSync
This app simplifies weight tracking by connecting to smart scales via Bluetooth. It allows users to easily record and visualize their weight data without requiring registration or an internet connection, prioritizing user privacy.
- Bluetooth smart scale connection
- Weight data recording
- Weight data visualization
- No registration required
- Offline functionality
- User data privacy
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WeighSync transforms into a streamlined weight tracking application, solely focused on the essential task of measuring weight. This application connects seamlessly with smart scales via Bluetooth, offering a user-friendly and efficient way to record and visualize weight data. The simplified operation eliminates the need for registration, providing a direct and clutter-free interface that supports use even without an internet connection, ensuring user data privacy. Disclaimer: This App solely provides convenience for measuring your body weight. We do not give any medical advises. Before you are going to make any medical decisions, please consult a doctor.
Screenshots
Verdict
The clearest difference is rating: Ketonix at 2.3 against WeighSync's 1.0. Ketonix also leads on review sentiment (20% vs 5%) and iOS requirement (10.0 vs 14.0). 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.
Ketonix holds the better App Store score, 2.3 against 1.0. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews point the same way: 20% of Ketonix's written reviews are positive against 5% of WeighSync's.
Ketonix ships an update every 5 weeks, WeighSync every 3 weeks. The most recent releases landed on June 11, 2026 and August 29, 2026 respectively.
| Parameter | Ketonix | WeighSync |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (6 ratings) — better | 1.0 (3 ratings) |
| Positive reviews | 20.0% of reviews — better | 4.5% of reviews |
| Number of ratings | 6 — better | 3 |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 90 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | M Object Oriented Software Engineering AB | Conmo Electronic Company Limited |
Customer experience
Ketonix
WeighSync
In-app purchases
Ketonix
No in-app purchases
WeighSync
No in-app purchases
