Polar Flow vs Ether Trails
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 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.
- 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
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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
Ether Trails
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Ether: Bike Speedometer & Route Safety THE RIDE COCKPIT THAT WATCHES YOUR BACK Ether turns your phone into a live GPS speedometer for cycling, hiking, and trail running - then quietly makes sure the people who care about you know you're safe, without you lifting a finger. Ride solo on unfamiliar roads, or lead a group out on the trail. Either way, you get a clean cockpit mid-ride and a safety net running underneath it. LIVE SPEEDOMETER & RIDE COCKPIT: Real-time GPS speed, average speed, and top speed, always readable mid-ride. Distance, elevation climb, pace, and moving time at a glance. High-contrast, large-type display built for sunlight and motion, not a cluttered dashboard. CRASH DETECTION & SOS: Automatic crash detection triggered by a sudden speed drop. One-tap SOS that alerts only your trusted circle, never strangers. Stop-check-ins if you go quiet, so nobody has to guess where you are. LIVE LOCATION SHARING WITH YOUR CIRCLE: Share your live ride or hike with family, your riding partner, or your crew. Private circles only - your location is never public. Geofenced trusted places for automatic arrival and departure alerts. TRAIL & ROUTE INTELLIGENCE: Pre-ride trail conditions, surface status, and recent rider reports. Personalized difficulty scoring before you commit to a route. Route planning with a full post-ride summary, photos, and journey timeline. BUILT FOR CYCLISTS, HIKERS, AND TRAIL RUNNERS: Solo or in a group. Road, gravel, or singletrack. Pair Ether with your favorite route planner for turn-by-turn navigation, and let Ether handle the live speed tracking and the safety net underneath it. Ether is free to download. Circle safety features and advanced trail intelligence are available with a subscription. Your trail. Your safety. Your circle. Terms of Service: https://joinether.com/terms Privacy Policy: https://joinether.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Ether Trails at every 4 days against Polar Flow's monthly. On price, ads, in-app purchases 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 and Ether Trails sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Polar Flow ships an update monthly, Ether Trails every 4 days. The most recent releases landed on November 14, 2026 and November 5, 2026 respectively.
| Parameter | Polar Flow | Ether Trails |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (50K ratings) — better | — |
| Positive reviews | 49.7% of reviews | — |
| Number of ratings | 50K — better | — |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 191 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Polar Electro | Reloom Studios (OPC) Private Limited |
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
Ether Trails
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polar Flow
- Polar Fitness Program1 Month trial$8.991 Month
Ether Trails
- Ether Weekly Subscription$3.997 Days
- Ether Monthly Subscription$9.991 Month









