Karbs vs Cylr
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Karbs
Easily track carbohydrate intake for managing diabetes. Create custom food lists, build meals, and instantly see total carb counts. Syncs with Health for comprehensive health monitoring.
- Create custom food lists
- Build meals from food lists
- Track quantities
- Instant carb calculation
- Sync with Health app
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Count carbs easier than ever. Crafted with love for patients with diabetes. - Create a list of food you buy at the supermarket or order at your favorite restaurants. - Create meals and add food from your own list. - Add the quantity for each item. - See the total calculation immediately. - Sync data with Health. Disclaimer: This application can cause you severe harm in case of misuse. If you are a patient with a metabolic disease such as diabetes, your doctor must teach you how to count carbohydrates properly from nutrition facts. You should stop using this application immediately if you do not know how to count carbohydrates. If you use a bolus calculator and you inject insulin based on an erroneous amount of carbohydrates you could be at serious risk, including risk of death. If you use this application, you understand and agree that you are solely responsible for its correct use and supervision by a professional. This application is not a regulated medical device.
Cylr
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Cylr β Echo Bike Training Companion Cylr is a focused training companion built to turn your iPhone into a dedicated performance display for Echo Bike workouts. It delivers clean, real-time data, structured workout tools, and detailed post-workout analysis without unnecessary setup, accounts, or subscriptions. Designed for athletes who train with intent, Cylr helps you see exactly how youβre performing while you ride and understand your workouts after youβre done. REAL-TIME TRAINING DISPLAY Once connected to your Echo Bike over Bluetooth, Cylr displays live workout metrics directly on your iPhone, including calories, distance, pace, watts, and RPM. Metrics update continuously so you can adjust effort, pacing, and intensity in real time. For heart rate tracking, Cylr pairs with Apple Watch or compatible Bluetooth heart rate straps. Heart rate data is shown live during workouts and stored alongside bike metrics for complete session visibility. KEY FEATURES β’ Live Bluetooth connection to Echo Bike β’ Real-time display of calories, distance, watts, RPM, and pace β’ Live heart rate graph with customizable zones β’ Live power (watts) graph during workouts β’ Individual statistics for every work and rest interval β’ Detailed workout history with full metric breakdowns β’ Automatic workout saving to Apple Health β’ Portrait and landscape workout views β’ Zone 2 training mode for steady-state aerobic sessions WORKOUTS & INTERVAL TRAINING Cylr supports both structured and flexible training. Create fully customized interval workouts or choose from preloaded sessions designed for conditioning, endurance, and performance. Custom interval workouts allow you to configure: β’ Number of rounds β’ Work duration β’ Rest duration β’ Audio cues for interval transitions Each interval is tracked independently, allowing you to review power output, heart rate response, and pacing with precision. This makes it easy to evaluate effort consistency and adjust future workouts based on real data. ZONE-BASED TRAINING & FEEDBACK Cylr supports customizable heart rate zones with color-coded feedback during workouts. Whether youβre targeting aerobic base training or higher-intensity efforts, zone feedback helps keep training aligned with your goals. A dedicated Zone 2 mode is included for athletes focused on steady-state aerobic development and endurance consistency. WORKOUT REVIEW & HISTORY After every workout, Cylr saves a detailed summary so you can review performance over time. See how your power output, heart rate response, and pacing change across intervals and sessions. Workout history makes it easy to: β’ Compare sessions β’ Identify trends β’ Track improvements in power and consistency β’ Review individual interval performance All workout data remains accessible for long-term progress tracking. BUILT SPECIFICALLY FOR ECHO BIKE Cylr is a companion app built exclusively for Echo Bike workouts. It does not support other exercise bikes or trainers. This focused approach allows Cylr to deliver accurate metrics, stable Bluetooth connectivity, and features designed specifically around Echo Bike performance. APPLE HEALTH & PRIVACY All workouts sync automatically to Apple Health, including calories, distance, heart rate, workout duration, and active energy. Cylr does not require an account and does not collect personal information beyond what is necessary to display and store workout data. Your data stays on your device and within Apple Health. REQUIREMENTS β’ Echo Bike with Bluetooth capability β’ iPhone running iOS 17.0 or later β’ Apple Watch or compatible Bluetooth heart rate strap required for heart rate tracking Cylr is built for athletes who want clear, real-time feedback, structured training tools, and complete visibility into every Echo Bike workout.
Screenshots
Verdict
The clearest difference is price: Cylr at Free against Karbs's $2.99. Cylr also leads on update cadence (every 3 days vs every 8 days) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Cylr is free to download; Karbs costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Karbs ships an update every 8 days, Cylr every 3 days. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.
| Parameter | Karbs | Cylr |
|---|---|---|
| Price | $2.99 | Free β better |
| Positive reviews | 0.0% of reviews | β |
| Update frequency | Every 8 days | Every 3 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | β |
| Devices | iPhone | iPhone, iPad, Apple Watch β better |
| Requires iOS | 27.0 | 26.1 β better |
| Further details β not scored | ||
| Size | 12 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Cristian Ortega Gomez | Useful Things LLC |
In-app purchases
Karbs
No in-app purchases
Cylr
No in-app purchases









