Polar Flow vs Acetrack
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
Acetrack
Monitor your body's fat-burning rate with a portable breathalyzer device and companion app. Discover how diet, exercise, sleep, and stress impact your metabolic state. Make informed lifestyle choices for improved health.
- Track fat burning rate
- Analyze ketosis levels
- Understand lifestyle impacts
- Support for various diets
- Personalized metabolic insights
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Tracking your fat burning rate is as simple as breathing. All you need is this app and our pocket-friendly device, Acetrack. How do factors like diet, training, mood, stress or sleep affect your fat burning? Use the Acetrack app to find out. Acetrack — a good friend on the metabolic journey towards better health: Measure your fat burning rate wherever you are. Find out what affects your level of ketosis. Make more informed dietary decisions. Trace the impact of your lifestyle choices. Do you have to follow a ketogenic diet to use Acetrack? Not at all. Breath acetone measurements are useful for all types of diets that boost your metabolism. Keto, low-carb, paleo, vegan, Atkins, fasting, zero carb, pescatarian, carnivore... Understand your unique metabolism with Acetrack Understanding your own body and rate of fat burning will help you make better dietary choices. Learn what happens in your body throughout the day, week and month with Acetrack.
Screenshots
Verdict
The clearest difference is review sentiment: Polar Flow at 50% against Acetrack's 0%. Polar Flow also leads on rating (4.6 vs 3.0) and ads (none vs shown). Acetrack's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 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. Acetrack asks for nothing beyond the download.
Polar Flow holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 2, 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 0% of Acetrack's.
Polar Flow ships an update monthly, Acetrack every 3 months. The most recent releases landed on November 12, 2026 and November 2, 2026 respectively.
| Parameter | Polar Flow | Acetrack |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (50K ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 49.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 50K — better | 2 |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 191 MB | 11 MB |
| Age rating | 4+ | 12+ |
| Developer | Polar Electro | Deversify |
Customer experience
Polar Flow
Acetrack
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
Acetrack
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Polar Flow
- Polar Fitness Program1 Month trial$8.991 Month
Acetrack
No in-app purchases









