Comparison

Polar Flow vs Pool Clock

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

Pool Clock

This app simulates a traditional swimming pace clock for interval training. It helps swimmers track intervals, set preparation times, and manage repetitions. Features include an optional digital clock and sound alerts.

Highlights
  • Interval training timer
  • Customizable interval repetitions
  • Preparation time setting
  • Optional digital clock display
  • Countdown beep sound
  • Screen stays on during use
Features
Read full description

Pool Clock is designed for interval-based training during swimming exercise. This app simply reproduces the traditional analog swimming pace clock found on the pool deck. By placing your device or a TV monitor connected to the device at the poolside, you can start swimming workouts wherever you are. Be careful to keep your electronic device waterproof when use it poolside. *** Interval *** With the interval function, you can easily track the interval on the pace clock. Once you set the Interval Time, Iteration (the number of interval repetitions), and Preparation time (time before the first start), a small triangle appears on the outside of the dial of the clock to indicate the next start time. *** Digital Clock *** The digital clock can be displayed or hidden using the ON/OFF button in the menu. The digital clock displays the current time of the device. You can choose between 12-hour or 24-hour display. *** Sound *** You can turn on/off the countdown beep sound in the menu. *** Notice *** This app prevents the screen from turning off while it is open.

Screenshots

Polar Flow4 screens
Pool Clock3 screens

Verdict

The call

The clearest difference is price: Polar Flow at Free against Pool Clock's $0.99. Polar Flow also leads on rating (4.6 vs 3.8) and update cadence (monthly vs every 25 months). Pool Clock's advantage is in-app purchases (none vs 1) and review sentiment (75% vs 49%). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Polar Flow is free to download; Pool Clock costs $0.99 up front. Polar Flow sells 1 in-app purchase, starting at $8.99 per month. Pool Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Polar Flow holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 49% of Polar Flow's written reviews are positive against 75% of Pool Clock's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Polar Flow ships an update monthly, Pool Clock every 25 months. The most recent releases landed on October 1, 2026 and September 13, 2026 respectively.

Scorecard8 real differences · 2 level
Polar Flow versus Pool Clock: the parameters behind the verdict, then further details
ParameterPolar FlowPool Clock
PriceFree — better$0.99
Rating4.6 (50K ratings) — better3.8 (4 ratings)
Positive reviews49.4% of reviews75.0% of reviews — better
Number of ratings50K — better4
Update frequencyMonthly — betterEvery 25 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.012.0 — better
Further details — not scored
Size189 MB3 MB
Age rating4+4+
DeveloperPolar ElectroSohta Itoh

Customer experience

Polar Flow

All ratings50,010 ratings
Positive91.3%
Neutral4.5%
Negative4.2%
Written reviews2,194 reviews
Positive49.4%
Neutral11.2%
Negative39.4%

Pool Clock

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

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

Pool Clock

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

Pool Clock

No in-app purchases

Questions

Is Polar Flow free?
Polar Flow is free to download, with in-app purchases available.
Is Pool Clock free?
Pool Clock costs $0.99, with no in-app purchases.
Which has better reviews, Polar Flow or Pool Clock?
Polar Flow is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while Pool Clock averages 3.8 from 4 ratings.
Do Polar Flow or Pool Clock have ads?
Neither Polar Flow nor Pool Clock shows ads.
Which is updated more often, Polar Flow or Pool Clock?
Polar Flow ships an update monthly, and Pool Clock every 25 months. Most recently, Polar Flow was updated on October 1, 2026 and Pool Clock on September 13, 2026.

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