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 provides advanced swim tracking and analysis for Apple Watch users. It offers detailed metrics, goal setting, and progress visualization to help swimmers of all levels optimize their performance. Seamlessly integrates with Apple Health for comprehensive data insights.

Highlights
  • Advanced swim metrics (SWOLF, stroke efficiency)
  • Structured workout import to Apple Watch
  • Detailed splits and data analysis
  • Trend charts and long-term progress tracking
  • Personal best tracking
  • Swimming achievement stickers
  • Compare two swims feature
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. Terms of Use (EULA): https://swimnow.app/termsofuse Email: swimnow@outlook.com

About

Calorimeter

Track your daily calorie burn, log food intake with barcode scanning, and understand your energy balance. Set personalized macro and calorie goals to monitor your progress over time. Integrates with Apple Health for a comprehensive view of your fitness.

Highlights
  • Daily calorie burn tracking
  • Food logging with barcode scanner
  • Macro and calorie goal setting
  • Energy balance visualization
  • Apple Health integration
  • Custom food and recipe creation
  • Progress charts and trends
Features
Read full description

See your whole day's calorie burn, log food and understand your energy balance. Calorimeter brings your Apple Health data, food diary and macros into one daily view. SEE WHAT YOU BURN See active and resting calories together, with recorded workouts in context. When enough history is available, get a personal estimate of your total burn by the end of the day. LOG FOOD YOUR WAY Search foods, scan barcodes and choose your portions. Add calories and macros directly for a quick entry. Reuse favorites and recent foods, create custom foods, and save recipes with nutrition calculated per serving. SET GOALS THAT FIT YOU Follow protein, carbohydrates and fat alongside your calories and remaining daily allowance. Set your own targets or calculate goals using your burn history and established formulas. UNDERSTAND YOUR ENERGY BALANCE Compare recorded calories consumed with calories burned to see your estimated deficit or surplus. Explore weekly, monthly and yearly trends in intake, burn, weight and workouts. Revisit your food diary to understand your habits over time. KEEP PROGRESS IN VIEW Check daily summaries on Apple Watch, add Home Screen and Lock Screen widgets, or ask Siri for today's burned calories or remaining allowance. Calorimeter Pro adds Progress charts, browsing earlier days, all-time energy widgets and complications, and higher food-log and saved-library limits. Download Calorimeter and bring your calorie burn and nutrition into focus. Terms of Use: https://calorimeter.app/terms/ Privacy Policy: https://calorimeter.app/privacy/

Screenshots

SwimNow4 screens
Calorimeter4 screens

Verdict

The call

The clearest difference is rating: SwimNow at 4.9 against Calorimeter's 3.9. SwimNow also leads on review sentiment (76% vs 50%) and ratings volume (44 vs 10). Calorimeter's advantage is device support (3 vs 1). 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 $4.99 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 3.9. Both are backed by a comparable volume of ratings — 44 and 10 respectively. Written reviews point the same way: 76% of SwimNow's written reviews are positive against 50% of Calorimeter's.

UpkeepUpdate frequency

SwimNow ships an update weekly, Calorimeter every 3 days. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
SwimNow versus Calorimeter: the parameters behind the verdict, then further details
ParameterSwimNowCalorimeter
PriceFreeFree
Rating4.9 (44 ratings) — better3.9 (10 ratings)
Positive reviews76.4% of reviews — better50.0% of reviews
Number of ratings44 — better10
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.2 — better27.0
Further details — not scored
Size204 MB38 MB
Age rating4+4+
Developer阳 邹Bogdan Dovgopol

Customer experience

SwimNow

All ratings44 ratings
Positive97.7%
Neutral0.0%
Negative2.3%
Written reviews72 reviews
Positive76.4%
Neutral9.7%
Negative13.9%

Calorimeter

All ratings10 ratings
Positive70.0%
Neutral10.0%
Negative20.0%
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$4.991 Month
  • Pro Annual7 Days trial$29.991 Year
One-time1
  • Pro Lifetime$99.99

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 3.9 from 10 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 3 days. Most recently, SwimNow was updated on November 5, 2026 and Calorimeter on November 4, 2026.

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