Comparison

Polar Flow vs Boxing Trainer

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 your daily activity, analyze workouts with detailed data, and gain insights into your sleep and recovery. It integrates with Polar devices and other fitness services to provide personalized guidance for your health and fitness journey.

Highlights
  • Activity Tracking (steps, calories, distance)
  • Detailed Training Analysis (heart rate, pace, power)
  • Advanced Sleep Insights
  • Training Load & Recovery Recommendations
  • Device and Sports Profile Management
  • Wireless Syncing with Polar Devices
  • Integration with Strava, TrainingPeaks, and more
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

Boxing Trainer

Read full description

Train smarter with real-time heart rate coaching, automatic punch counting, and Strava sync. Your personal boxing interval timer. Description: Boxing Trainer is your personal interval training coach, designed for boxing workouts with smart heart rate monitoring and voice-guided coaching. SMART INTERVAL TRAINING Set up customizable rounds with three phases: Boxing, Cardio/Exercise, and Rest. Configure durations from quick 15-minute sessions to full hour-long workouts. Choose from preset routines or create your own. REAL-TIME HEART RATE COACHING Connect your Apple Watch, AirPods Pro 2, or any Bluetooth heart rate monitor. Get voice feedback based on your effort - the app tells you to push harder or ease up based on your heart rate zones. PUNCH DETECTION (BETA) Place your phone near the bag and the app listens for punch impacts, counting your punches and tracking intensity throughout each round. EFFORT SCORING Gamify your workouts with round-by-round effort scores based on heart rate intensity, consistency, and recovery. VIDEO RECORDING Record your workouts to review technique later. Videos are stored locally and can be shared or exported. STRAVA INTEGRATION Connect your Strava account to automatically upload completed workouts. FEATURES: • Customizable round structure (1-20 rounds) • Boxing and Kickboxing modes • Heart rate zone coaching • Punch counting with intensity tracking • Video recording with playback • Strava auto-upload • Effort scoring and gamification • Works with background music Download Boxing Trainer and take your boxing workouts to the next level.

Screenshots

Polar Flow4 screens
Boxing Trainer4 screens

Verdict

The call

The clearest difference is price: Polar Flow at Free against Boxing Trainer's $4.99. Boxing Trainer's advantage is in-app purchases (none vs 1). On update cadence, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Polar Flow is free to download; Boxing Trainer costs $4.99 up front. Polar Flow sells 1 in-app purchase, starting at $8.99 per month. Boxing Trainer asks for nothing beyond the download.

UpkeepUpdate frequency

Polar Flow ships an update monthly, Boxing Trainer every 3 weeks. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 8 level
Polar Flow versus Boxing Trainer: the parameters behind the verdict, then further details
ParameterPolar FlowBoxing Trainer
PriceFree — better$4.99
Rating4.6 (50K ratings) — better—
Positive reviews49.6% of reviews—
Number of ratings50K — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size191 MB3 MB
Age rating4+12+
DeveloperPolar ElectroJonathan Hammant

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

Boxing Trainer

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
None

Boxing Trainer

No in-app purchases

Questions

Is Polar Flow free?
Polar Flow is free to download, with in-app purchases available.
Is Boxing Trainer free?
Boxing Trainer costs $4.99, with no in-app purchases.
Do Polar Flow or Boxing Trainer have ads?
Neither Polar Flow nor Boxing Trainer shows ads.
Which is updated more often, Polar Flow or Boxing Trainer?
Polar Flow ships an update monthly, and Boxing Trainer every 3 weeks. Most recently, Polar Flow was updated on November 11, 2026 and Boxing Trainer on November 9, 2026.

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