Comparison

SwimNow vs Calorimeter

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

Head to head
About

SwimNow

This app analyzes and tracks swimming data from your Apple Watch and other synced devices. It offers detailed insights into your performance, advanced split views, and trend charts to help you improve your swimming efficiency and achieve your goals.

Highlights
  • Import structured workouts to Apple Watch
  • Advanced splits views with more metrics
  • Data analysis and trend charts
  • Swimming achievement stickers
  • Compare two swims
  • Set personal goals
  • Yearly and monthly summaries
Features
Read full description

THE ULTIMATE APPLE WATCH SWIM TRACKER SwimNow is the essential swim app designed specifically for Apple Watch. It empowers you to seamlessly track, analyze, and optimize every swimming workout right from your wrist. By integrating directly with the Apple Health App, SwimNow transforms your standard pool and open water swims into professional-grade analytics—capturing everything from laps, pace, and distance to advanced metrics like SWOLF and stroke efficiency. Whether you are a beginner aiming for general fitness or a competitive swimmer chasing a new Personal Best, this app provides the deep data insights you need to train smarter. Discover the best alternative to the native Fitness app and make every meter count! ► Import Structured Workouts to Apple Watch Easily edit your swimming plan on your phone and seamlessly import it to Apple Watch.(Need iOS 18 & WatchOS 10) ► Data View swimming data recorded by your Apple Watch native app in various formats, including calendar and list views. ► Advanced splits views Compared to the native app, the splits view offers more metrics, including stroke count, stroke efficiency, SWOLF, heart rate, and more. Helps you understand the details of each swim lap better. ► Swimming Achievement Stickers Unlock a variety of fun achievement stickers. Place them freely to record your growth and show off your unique swimming style. ► Compare Two Swims Compare technical metrics between two swimming sessions to help you spot differences and continuously refine your technique. ► Data Analysis Provide comprehensive swimming statistics, including swim time, distance, pace, stroke count, stroke rate, calories burned, heart rate, and more, with detailed breakdowns for each interval and lap. ► Trend, Charts, Graph Select time periods, filter by swimming style, pool length, and distance. With comprehensive technical metrics and multidimensional statistics, generate detailed trend charts that help you easily track and analyze long-term swimming data, identify progress and areas for improvement, and enhance your performance. ► Set Goals Set personal goals and cultivate swimming habits to achieve your objectives. ► PB Personal best in different distances. like 100m, 200m, 1000m, 1500m... ► More Metrics Additional metrics such as METs and training impulse. ► Yearly Recap A cool yearly recap that highlights every bit of your persistence and progress throughout the year. ► Monthly & Weekly Summaries Crystal-clear summaries that make every bit of your progress easy to track. ► Distance Correction Fixed an issue where Apple Watch recorded incorrect distances during Open Water Swims (caused by breaststroke). You can edit stroke types and adjust distance for all laps at once, making it easier to correct missed laps or inaccurate swim data recorded by Apple Watch during pool workouts. ► Training Notes Add personalized notes to each training session to track progress and key details. ► AI Analysis Analyzes swimming data within your monthly summaries to optimize your training plans. ► Sharing Features Easily share your swim data with long screenshots, cards, or text. Download SwimNow now and start your swimming data analysis journey, making every meter count! SwimNow offers both a one-time payment option and an annual subscription. The subscription includes an auto-renewal feature. This means it will automatically renew unless you manage your subscription in your account settings. After purchase, you can manage your subscription and turn off auto-renewal in your account settings in the App Store. Email: swimnow@outlook.com

About

Calorimeter

This app helps you monitor daily calorie expenditure and nutrition. It tracks active and resting calories, offers macro logging, and provides insightful graphs. Seamlessly integrates with Apple Health and Fitness for a comprehensive view of your health journey.

Highlights
  • Active calorie tracking
  • Resting calorie calculation
  • Total calorie overview
  • Daily goal setting
  • Configurable widgets
  • Macro tracking
  • Apple Health integration
Read full description

Calorimeter is your ultimate companion for tracking, counting and managing your daily burned calories and nutrition intake. Whether you’re an athlete, incorporating workout routines, or just getting started on your fitness journey, Calorimeter helps you stay on top of your calorie expenditure and nutritional needs effortlessly. Key Features: - Active Calories Tracking: Monitor the calories you burn through physical activity, exercise, training, and workout sessions in real-time. - Resting Calories Calculation: Keep track of the calories your body burns at rest throughout the day. - Total Calories Overview: Get a comprehensive view of your total calories burned & consumed with detailed charts and statistics. - Daily Goal Setting: Set your daily active calorie goal and track your progress with an intuitive progress bar. - Configurable Widgets: Add widgets to your home screen to track burned calories and goal progress at a glance. - Insightful Graphs: Analyse trends of your calories burned over the day, week, month, or year with easy-to-read graphs. - Macro Tracking: Log and track macros (protein, carbs, fat) to maintain a balanced diet and achieve your weight loss or gain goals. - Powered by Apple Health & Apple Fitness, allowing you to seamlessly use Calorimeter with other health-tracking apps. Why Choose Calorimeter? - User-Friendly Interface: Sleek and intuitive design makes it easy for you to track your calories burned and nutritional intake without any hassle. - Customisable Goals: Set personalised burned calorie and nutritional goals based on your fitness objectives and adjust them as needed. - Comprehensive Data: View both your active and resting calories, along with your food and macro intake, giving you a complete picture of your daily energy expenditure and nutrition. - Convenient Widgets: Stay updated with your progress right from your home screen with configurable widgets. Perfect for All Fitness Enthusiasts: Whether you’re hitting the gym, engaging in sport activities, training for an event, or just staying active at home, Calorimeter serves as an excellent calorie tracker, nutrition tracker, and workout tracker. Track your exercise, log your food, macros, and achieve your fitness goals with ease. Download Calorimeter today and take the first step towards a healthier, more active lifestyle. Manage your calories, nutrition, and stay motivated with Calorimeter health tracker! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SwimNow4 screens
Calorimeter4 screens

Verdict

The call

The clearest difference is rating: SwimNow at 4.9 against Calorimeter's 4.1. SwimNow also leads on review sentiment (77% vs 50%) and ratings volume (44 vs 8). On price, update cadence, ads and in-app purchases 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. SwimNow sells 2 in-app purchases, starting at $14.99 per year and Calorimeter sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SwimNow holds the better App Store score, 4.9 against 4.1. That said, the two scores are not equally well evidenced: SwimNow has 44 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 77% of SwimNow's written reviews are positive against 50% of Calorimeter's.

UpkeepUpdate frequency

SwimNow ships an update weekly, Calorimeter every 6 days. The most recent releases landed on October 17, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
SwimNow versus Calorimeter: the parameters behind the verdict, then further details
ParameterSwimNowCalorimeter
PriceFreeFree
Rating4.9 (44 ratings) — better4.1 (8 ratings)
Positive reviews77.5% of reviews — better50.0% of reviews
Number of ratings44 — better8
Update frequencyWeeklyEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS17.217.0 — better
Further details — not scored
Size170 MB97 MB
Age rating4+4+
Developer阳 邹Bogdan Dovgopol

Customer experience

SwimNow

All ratings44 ratings
Positive97.7%
Neutral0.0%
Negative2.3%
Written reviews71 reviews
Positive77.5%
Neutral8.5%
Negative14.1%

Calorimeter

All ratings8 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

2 purchases

SwimNow

Subscriptions1
  • Yearly7 Days trial$14.991 Year
One-time1
  • Lifetime$39.99
3 purchases

Calorimeter

Subscriptions2
  • PRO Monthly$2.991 Month
  • PRO Annually3 Days trial$19.991 Year
One-time1
  • PRO Lifetime$59.99

Questions

Is SwimNow free?
SwimNow is free to download, with in-app purchases available.
Is Calorimeter free?
Calorimeter is free to download, with in-app purchases available.
Which has better reviews, SwimNow or Calorimeter?
SwimNow is rated higher. SwimNow averages 4.9 out of 5 from 44 ratings, while Calorimeter averages 4.1 from 8 ratings.
Do SwimNow or Calorimeter have ads?
Neither SwimNow nor Calorimeter shows ads.
Which is updated more often, SwimNow or Calorimeter?
SwimNow ships an update weekly, and Calorimeter every 6 days. Most recently, SwimNow was updated on October 17, 2026 and Calorimeter on October 3, 2026.

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