Comparison

Heartool vs side.kit

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

Head to head
About

Heartool

Transform your phone into a fitness tracker to monitor workouts with live heart rate data. Analyze training progress with professional charts and gain insights into your health and cardio condition. Integrates with wearable devices and Apple Health.

Highlights
  • Live heart rate tracking
  • HRV biofeedback
  • Cardio health analysis
  • Workout progress charts
  • Calorie burned tracking
  • Health data synchronization
Read full description

Turn your phone into a fitness tracker with Heartool, to record your workouts with heart rate data. It is a concise and most accurate way to measure your training progress, to reach your fitness goals. Working with wearable devices to train in real time. For heart rate sensor recommend: www.fitcare.com Heartool gives you: 1.Tracking your live heart rate at right intensity for maximum results. With professional chart records, users could see their exercise effects when and after their training. 2.HRV biofeedback. Based on the heart rate sensor R-R interval data, together with professional algorithm, Heartool could help you to know your health and training status. 3.Cardio health condition. Based on the waveform (ECG) data and through the professional algorithm, Heartool could help you to discover hidden heart health hazards in time. HealthKit 1. Heartool Will share the record (heart rate) to the Apple's health applications after each exercise 2. Because the privacy of your health data is very important, the user must agree to authorize Apple Health in "Set up -> Authorization" in the Heartool APP before sharing the heart rate data to your Apple Health app. 3. Heartool Connect to a healthy feature supports iPhone 6 and above devices, and the system version is iOS9.0 and above. Main features: 1.Personalized heart rate zone setting, sync to the training sensor. 2.Calories burned checking based on the workouts. 3.Storing data import. If sensors not connected to the App, data could sync to the App after training. 4.Daily health management with cardio status and stress reflect. 5.Health data record, review a summary of the result from your entire workout history.

About

side.kit

Features
Read full description

SideKit is your running sidekick. The ultimate running companion for any weather. Sidekit delivers personalized gear recommendations and smart scheduling based on real-time weather conditions. Our goal? Never wonder what to wear on your run again! Get tailored advice for clothing, accessories, and fueling needs based on temperature, wind, precipitation, UV index, and air quality. ## Key Features: • Real-time weather data with runner-specific metrics • Smart gear recommendations for different distances • Intelligent scheduling with to get notifications in advance • Location-based forecasts with multiple saved locations Plan your perfect run with confidence, regardless of weather conditions. Runner's Weather Assistant keeps you prepared, comfortable, and safe every time you lace up. Download now and upgrage your running experience!

Screenshots

Heartool4 screens
side.kit4 screens

Verdict

The call

The clearest difference is update cadence: side.kit at fortnightly against Heartool's every 4 months. Heartool's advantage is iOS requirement (12.0 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Heartool ships an update every 4 months, side.kit fortnightly. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

Scorecard2 real differences · 8 level
Heartool versus side.kit: the parameters behind the verdict, then further details
ParameterHeartoolside.kit
PriceFreeFree
Rating3.1 (14 ratings) — better—
Positive reviews21.2% of reviews—
Number of ratings14 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.1
Further details — not scored
Size24 MB20 MB
Age rating12+4+
DeveloperShenzhen Onecoder Technology Co., Ltd.Miguel Lopes

In-app purchases

None

Heartool

No in-app purchases

None

side.kit

No in-app purchases

Questions

Is Heartool free?
Heartool is free to download, with no in-app purchases.
Is side.kit free?
side.kit is free to download, with no in-app purchases.
Do Heartool or side.kit have ads?
Neither Heartool nor side.kit shows ads.
Which is updated more often, Heartool or side.kit?
Heartool ships an update every 4 months, and side.kit fortnightly. Most recently, Heartool was updated on September 18, 2026 and side.kit on September 12, 2026.

Other comparisons