WeightsBook vs Heart Rate Analyzer Cardiobyte
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WeightsBook
This app offers a digital alternative to traditional paper weightlifting journals. It tracks advanced training metrics and provides tools for both beginners and experienced lifters, including client management for trainers.
- Digital weightlifting journal
- Advanced exercise tracking (RIR, RPE, partial reps)
- Superset and drop set support
- Multiple client diaries
- Workout and rest timer
- Workout calendar
Read full descriptionHide full description
I’ve been lifting for more than 20 years, and I built WeightsBook because I was tired of workout-logging apps that made a simple job feel complicated. With every app I tried, I came away with the same impression: its designers did not understand how lifters actually use a training journal. As a programmer, I decided to build the app I wanted. I returned to what had always worked—pen and paper—and built from there. While training a friend one day, I realized the same journal idea could help personal trainers: a separate weightsbook for every client, all in one app. That led me to add support for multiple weightsbooks, allowing trainers to record each client’s workouts separately and export or share each one. The result is WeightsBook: a modern lifting log that retains the look, feel, and simplicity of a traditional training journal. Its distinctive handwritten style is intentional. Logging a set should feel like writing it down, not operating a dashboard. Within that familiar design, experienced lifters will find detailed tracking for RPE, RIR, supersets, drop sets, and partial reps. If you have ever abandoned a workout app and gone back to a notebook, WeightsBook was made for you.
Heart Rate Analyzer Cardiobyte
This app tracks your heart health by analyzing heart rate, activity, sleep, and mindfulness. It uses AI to provide insights and answer health-related questions, integrating with Apple Health for comprehensive data. Understand how your lifestyle impacts your cardiovascular well-being.
- Heart rate and HRV monitoring
- Activity and sleep analysis
- Energy level tracking
- Mindfulness logging
- AI-powered health insights
- Apple Health integration
- Trends and comparisons
Read full descriptionHide full description
Cardiobyte®: Your Heart's Health Companion Unlock the power of your heart with Cardiobyte, the ultimate health app for discovering the intricate relationships between your heart health and key lifestyle parameters like activity, sleep, energy, and mindfulness. Powered by advanced Artificial Intelligence (AI) from OpenAI, Cardiobyte not only provides you with insights, trends, and charts but also answers health-related queries. Note that Apple Health data is required to use this app. Key Features: - Easily take your heart rate with fingertip on the camera - Comprehensive Heart Monitoring: Track heart rate, heart rate variability (HRV), and other vital metrics & get detailed insights into your heart health - Activity Insights: Monitor your daily steps, exercise duration, and overall activity levels. See how your activity impacts your heart and overall well-being - Sleep Analysis: Get detailed insights into your sleep patterns, including duration and quality, and understand how they affect your heart health. Compatible with Apple Health. - Energy Levels: Track your energy throughout the day and see the correlation with your heart's performance - Mindfulness Tracking: Log your mindfulness activities and discover their impact on your heart and overall health - AI-Powered Insights: Ask health-related questions and receive personalized, AI-generated responses. Examples include understanding HRV significance, optimizing exercise routines, and more - Trends & Comparisons: Visualize trends over time and compare your activity with other key vitals to understand how various factors impact your heart health - Integration with Apple Health: Sync with your Apple Health to track your heart rate, workout routines, and more - Privacy: Health data sent to OpenAI is strictly anonymized, no identifiable information such as name, email, or date of birth is included. Additionally, we do not have access to your health data outside the app. For more details, check our privacy policy: www.cardiobyte.app/privacy Why Cardiobyte? Cardiobyte goes beyond simple heart rate monitoring by providing a holistic view of your heart health. With AI-driven insights and an easy-to-use interface, you can make informed decisions to improve your lifestyle and well-being. Whether you're using an Apple Watch or a fitness tracker, Cardiobyte seamlessly integrates with your devices to provide comprehensive health tracking through Apple Health Download Cardiobyte today and take the first step towards a healthier heart and a healthier you Disclaimers: - Cardiobyte is NOT a medical device. This app is not a clinical grade heart rate monitor. For accurate readings, consult a medical professional - Cardiobyte is NOT a substitute for a doctor or professional healthcare or advice. Any health related information provided in Cardiobyte App and this website is for informational purposes only and should not be used to replace the advice of healthcare professionals. No information on this app is intended to be a substitute for professional medical advice, diagnosis, or treatment - Cardiobyte is NOT a substitute for backing up Health Data. Cardiobyte pulls data from Apple Health but does not back up this data. It is the user's responsibility to regularly backup their data - Cardiobyte is dependent on Apple Health. Cardiobyte App pulls data from Apple Health. If data from Apple Health is unavailable, no data will be presented in the App. - Cardiobyte data accuracy is dependent on Apple Watch (or similar fitness tracker) wear time. Cardiobyte App displays only the data available based on how long the Apple Watch (or similar fitness tracker) was worn. The app can only present data that is available in Apple Health - Cardiobyte is dependent on OpenAI for GPT Queries. Cardiobyte send requests to OpenAI for GPT responses. If service from OpenAI is unavailable, no responses will be presented in the App The full disclaimer is available at https://www.cardiobyte.app/disclaimer
Screenshots
Verdict
The clearest difference is price: WeightsBook at $4.99 against Heart Rate Analyzer Cardiobyte's $39.99. WeightsBook also leads on in-app purchases (none vs 3) and ads (none vs shown). Heart Rate Analyzer Cardiobyte's advantage is rating (4.4 vs 3.0) and ratings volume (112 vs 1). On device support and iOS requirement 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
WeightsBook costs $4.99 and Heart Rate Analyzer Cardiobyte $39.99 up front. Heart Rate Analyzer Cardiobyte sells 3 in-app purchases, starting at $1.99 per 7 days. WeightsBook asks for nothing beyond the download.
Heart Rate Analyzer Cardiobyte holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Heart Rate Analyzer Cardiobyte has 112 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 80% of WeightsBook's written reviews are positive against 67% of Heart Rate Analyzer Cardiobyte's, so the app with the better star average is not the one people write more warmly about.
WeightsBook ships an update every 2 weeks, Heart Rate Analyzer Cardiobyte every 5 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | WeightsBook | Heart Rate Analyzer Cardiobyte |
|---|---|---|
| Price | $4.99 — better | $39.99 |
| Rating | 3.0 (1 ratings) | 4.4 (112 ratings) — better |
| Positive reviews | 80.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 1 | 112 — better |
| Update frequency | Every 2 weeks — better | Every 5 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 130 MB |
| Age rating | 4+ | 12+ |
| Developer | Mike Hurwitz | LifeWave, LLC |
Customer experience
WeightsBook
Heart Rate Analyzer Cardiobyte
In-app purchases
WeightsBook
No in-app purchases
Heart Rate Analyzer Cardiobyte
- Weekly Subscription$1.997 Days
- Monthly Subscription$5.991 Month
- Annual Subscription$24.991 Year
Questions
Is WeightsBook free?
Is Heart Rate Analyzer Cardiobyte free?
Which has better reviews, WeightsBook or Heart Rate Analyzer Cardiobyte?
Do WeightsBook or Heart Rate Analyzer Cardiobyte have ads?
Which is updated more often, WeightsBook or Heart Rate Analyzer Cardiobyte?
Other comparisons















