Comparison

Polar Flow vs ErgScan

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Activity Tracking
  • Training Analysis
  • Sleep Insights
  • Training Load & Recovery
  • Device & Profile Management
  • Wireless Syncing
  • Third-Party Service Integration
Features
Read full description

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

About

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.

Highlights
  • 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
Features
Read full description

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

Polar Flow4 screens
ErgScan4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Polar Flow ships an update monthly, ErgScan every 8 days. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
Polar Flow versus ErgScan: the parameters behind the verdict, then further details
ParameterPolar FlowErgScan
PriceFreeFree
Rating4.6 (50K ratings)4.9 (13 ratings) — better
Positive reviews49.6% of reviews100.0% of reviews — better
Number of ratings50K — better13
Update frequencyMonthlyEvery 8 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.5 — better
Further details — not scored
Size189 MB135 MB
Age rating4+4+
DeveloperPolar ElectroBUNEME KYAKILIKA

Customer experience

Polar Flow

All ratings50,010 ratings
Positive91.3%
Neutral4.5%
Negative4.2%
Written reviews2,213 reviews
Positive49.6%
Neutral11.2%
Negative39.2%

ErgScan

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

1 purchases

Polar Flow

Subscriptions1
  • Polar Fitness Program1 Month trial$8.991 Month
4 purchases

ErgScan

Subscriptions3
  • Weekly Subscription7 Days trial$1.997 Days
  • Monthly7 Days trial$4.991 Month
  • ErgScan Premium Annual7 Days trial$29.991 Year
One-time1
  • ErgScan Premium$12.99

Questions

Is Polar Flow free?
Polar Flow is free to download, with in-app purchases available.
Is ErgScan free?
ErgScan is free to download, with in-app purchases available.
Which has better reviews, Polar Flow or ErgScan?
ErgScan is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while ErgScan averages 4.9 from 13 ratings.
Do Polar Flow or ErgScan have ads?
Neither Polar Flow nor ErgScan shows ads.
Which is updated more often, Polar Flow or ErgScan?
Polar Flow ships an update monthly, and ErgScan every 8 days. Most recently, Polar Flow was updated on October 20, 2026 and ErgScan on October 11, 2026.

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