Polar Flow vs ErgScan
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
ErgScan
Effortlessly log indoor rowing machine workouts by taking a photo of your screen. AI automatically detects and saves your session data, eliminating manual entry. Seamlessly sync your workouts with popular training platforms like Strava and TrainingPeaks.
- AI-powered photo scanning for workout data
- Automatic detection of splits and session details
- Syncs with Strava, TrainingPeaks, Concept2 Logbook
- Optimized for Concept2 rowing machines
- Structured workout data without manual entry
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ErgScan is the fastest way to log your indoor rowing workouts. Simply take a photo of your Concept2 rowing machine screen (or upload a photo), and ErgScan uses AI to automatically detect and save your workout - no manual typing, no spreadsheets, no screenshots. Designed for rowers, rowing clubs, and indoor rowing athletes, ErgScan turns your erg results into clean, structured workout data in seconds. How it works: - Finish your row - Take a photo of your Concept2 display - ErgScan scans your results and saves your workout automatically Smart AI workout scanning: ErgScan uses advanced AI image recognition to convert photos of your rowing machine screen into accurate workout data, including splits and session details. It works even when lighting or angles aren’t perfect! Sync with your favourite training platforms: You can automatically upload your rowing workouts to Strava, TrainingPeaks, Concept2 Logbook and more! Once connected, your workouts - including split data - sync seamlessly, so your training history stays complete across all platforms. Built for indoor rowing: Optimised for Concept2 rowing machines. Perfect for erg sessions, testing pieces, and training blocks. Ideal for club rowers, competitive athletes, and coaches. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: ErgScan at 100% against Polar Flow's 50%. ErgScan also leads on rating (4.9 vs 4.6) and update cadence (every 8 days vs monthly). Polar Flow's advantage is ratings volume (50K vs 13). 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. Polar Flow sells 1 in-app purchase, starting at $8.99 per month and ErgScan sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
ErgScan holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 13, 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 100% of ErgScan's.
Polar Flow ships an update monthly, ErgScan every 8 days. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.
| Parameter | Polar Flow | ErgScan |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (50K ratings) | 4.9 (13 ratings) — better |
| Positive reviews | 49.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 50K — better | 13 |
| Update frequency | Monthly | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 189 MB | 135 MB |
| Age rating | 4+ | 4+ |
| Developer | Polar Electro | BUNEME KYAKILIKA |
Customer experience
Polar Flow
ErgScan
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
ErgScan
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polar Flow
- Polar Fitness Program1 Month trial$8.991 Month
ErgScan
- Weekly Subscription7 Days trial$1.997 Days
- Monthly7 Days trial$4.991 Month
- ErgScan Premium Annual7 Days trial$29.991 Year
- ErgScan Premium$12.99









