Polar Flow vs JetBlack Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polar Flow
This app helps you track daily activity, analyze workouts with detailed metrics, and gain insights into sleep patterns and recovery. It allows for device management, route planning, and seamless syncing with other popular fitness platforms.
- Activity Tracking
- Training Analysis
- Sleep Insights
- Training Load & Recovery
- Device & Profile Management
- Wireless Syncing
- Third-Party Service Integration
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Polar Flow: Your Personal Sports, Fitness, and Health Companion The exclusive app designed to maximize the potential of your Polar devices. Key Features: Activity Tracking: Monitor your daily activity, steps, calories burned, and distance to stay motivated throughout the day. Training Analysis: Dive deep into your workouts with detailed data on heart rate, speed, pace, distance, power, and more. Understand the impact of each session and optimize your training routines. Sleep Insights: Discover how well you sleep with advanced sleep tracking. Get feedback on sleep stages and quality to improve your rest and recovery. See how sleep boosts your day and track skin temperature changes. Training Load & Recovery: Understand how your training sessions strain your body and get recommendations on recovery time to prevent overtraining. Manage your watch and profile: Customize and manage your Polar device, Sports profiles for different activities, Routes, and Training Targets. Wireless Syncing: Automatically sync data from your Polar devices for real-time updates, notifications, and other insights. Stay Connected: Connect your profile and sync your data with Strava, TrainingPeaks, Adidas, komoot, and many other services. Why Choose Polar Flow? Personalized Guidance: Receive personalized feedback and guidance and understand your progress. Comprehensive Ecosystem: Integrates seamlessly with Polar watches, heart rate monitors, and more for a holistic experience. User-Friendly Interface: Navigate your data effortlessly with our intuitive and clean design. Notification support: Your Polar watch will receive the same notifications as your phone screen—incoming calls, messages, and app notifications. Secure and Private: Your data is safely stored and protected, giving you peace of mind as you focus on your journey. Polar Flow app allows you to share some of your wellness data with Apple Health. This includes details of your training, your heart rate, and steps. Please note Polar Flow app is not intended for medical or diagnostic use. Get Started Today! Download Polar Flow and unlock the full potential of your Polar devices. You can find more info at https://www.polar.com/flow Connect with us! Instagram: www.instagram.com/polarglobal Facebook: www.facebook.com/polarglobal YouTube: www.youtube.com/polarglobal Find out more about Polar products at https://www.polar.com/en/products
JetBlack Trainer
Connect and manage your smart cycling trainer with this app. Designed by a professional coach, it helps you optimize your training sessions. Compatible with various Apple devices.
- Connect and manage smart trainer
- Designed by professional coach
- Optimize training sessions
- Compatible with iPhone, iPad, iPod
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Welcome to the JetBlack Trainer app. JetBlack Trainers have been designed by a professional Cycling and Triathlon coach who has coached at International and Olympic level. Use the JetBlack Trainer app to connect and manage your trainer.
Screenshots
Verdict
The clearest difference is rating: Polar Flow at 4.6 against JetBlack Trainer's 2.6. Polar Flow also leads on review sentiment (50% vs 11%) and ads (none vs shown). JetBlack Trainer's advantage is in-app purchases (none vs 1) and iOS requirement (12.2 vs 17.0). On price and device support 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. Polar Flow sells 1 in-app purchase, starting at $8.99 per month. JetBlack Trainer asks for nothing beyond the download.
Polar Flow holds the better App Store score, 4.6 against 2.6. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Polar Flow's written reviews are positive against 11% of JetBlack Trainer's.
Polar Flow ships an update monthly, JetBlack Trainer every 7 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | Polar Flow | JetBlack Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (50K ratings) — better | 2.6 (5 ratings) |
| Positive reviews | 49.6% of reviews — better | 11.1% of reviews |
| Number of ratings | 50K — better | 5 |
| Update frequency | Monthly — better | Every 7 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 12.2 — better |
| Further details — not scored | ||
| Size | 189 MB | 153 MB |
| Age rating | 4+ | 4+ |
| Developer | Polar Electro | JetBlack Products Pty Ltd |
Customer experience
Polar Flow
JetBlack Trainer
Bugs and requests
Polar Flow
Reported bugs
3 issues- App crashes during syncing
- Inconsistent data sync between watch and app
- Firmware updates causing loss of user data
Requested features
4 requests- Ability to manually edit workout data
- Integration with more third-party apps
- More advanced training programs and coaching
- Improved sleep tracking and analysis
JetBlack Trainer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polar Flow
- Polar Fitness Program1 Month trial$8.991 Month
JetBlack Trainer
No in-app purchases
