Best O2 Circuit Training Apps

249+ iOS apps curated and reviewed

3.9 avg rating
20 free apps
Updated October 2026

Whether you're new to o2 circuit training or looking for an upgrade, our curated collection of 249+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top O2 Circuit Training Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Circuit Training Timer LiteCircuit Training Timer LiteFree4.8โ˜… (468)NoYesOct 2026
2SimubusSimubusFreeโ€”NoYesOct 2026
3Interval TimerInterval TimerFree4.7โ˜… (3.6K)NoYesOct 2026
4Fresh Start TrainingFresh Start TrainingFree2.1โ˜… (150)NoNoOct 2026
5Circuit Training WorkoutCircuit Training WorkoutFreeโ€”YesYesMay 2026
6Tacx Trainingโ„ขTacx Trainingโ„ขFree4.6โ˜… (16K)NoNoOct 2026
7VO2 Master ManagerVO2 Master ManagerFree4.0โ˜… (9)NoNoOct 2026
8The Outsiders Fitness TrackerThe Outsiders Fitness TrackerFree4.6โ˜… (132)NoYesOct 2026

Top Picks for O2 Circuit Training

Circuit Training Timer Lite#1

Circuit Training Timer Lite by DenciSoft s.r.o.

Time and track your workouts
4.8๐Ÿ˜Š(468 ratings)
FreeIn-App Purchases
Circuit Training Timer Lite screenshot 1
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This app coaches your workouts with customizable timers, allowing you to focus on training. It supports location tracking for detailed statistics and heart rate monitoring with Bluetooth LE devices. Voice coaching and clear visual cues keep you informed without needing to check your screen.

What We Love

  • ๐Ÿ‘ Highly customizable workouts
  • ๐ŸŽถ Music integration
  • โฑ๏ธ Flexible timer settings
  • ๐Ÿ”Š Voice prompts for exercises
  • ๐Ÿ“š Saved workout routines
  • ๐Ÿ” Detailed exercise tracking

Room to Improve

  • ๐Ÿ”‹ Battery drain issues
  • ๐Ÿ”’ Limited functionality in free version
  • ๐Ÿ”‡ Quiet audio prompts
  • ๐Ÿ“ˆ Lack of workout history/progress tracking
Interval Timer#3

Interval Timer by HIIT Apps Sp. z o.o.

Tabata, HIIT, Circuit Training
4.7๐Ÿ˜Š(3.6K ratings)
FreeIn-App Purchases
Interval Timer screenshot 1
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Interval Timer screenshot 6

This app is a versatile interval timer designed for various training styles like Tabata and HIIT. It offers customizable workout parameters, voice guidance, and music ducking for an enhanced training experience. Save your custom workouts and track your progress.

What We Love

  • ๐Ÿ‘ Easy to use
  • ๐Ÿš€ Customizable workouts
  • ๐Ÿš€ Versatile and efficient
  • ๐Ÿš€ Helpful voice prompts
  • ๐Ÿ‘ Seamless music integration
  • ๐Ÿ‘ Great customer support

Room to Improve

  • ๐Ÿ› Bugs causing lost workouts
  • ๐Ÿ”‹ High battery consumption
  • ๐Ÿ’ฐ Subscription-based model
  • ๐Ÿ”’ Forced free trial
  • ๐Ÿ› Timing issues with intervals

More O2 Circuit Training apps to explore

FAQ about O2 Circuit Training

What are the best o2 circuit training apps for iPhone?
Circuit Training Timer Lite tops our o2 circuit training apps ranking as of October 2026, with a 4.8-star average from 468 App Store ratings, and it's free to download.
Yes โ€” 20 of the top o2 circuit training apps we rank are free to download, including Circuit Training Timer Lite and Simubus.
Circuit Training Timer Lite has no ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 249+ o2 circuit training apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.