Best O2 Circuit Training Apps

248+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated September 2026

Whether you're new to o2 circuit training or looking for an upgrade, our curated collection of 248+ 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 (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1O2 CIRCUIT TRAININGO2 CIRCUIT TRAININGFreeNoNoMay 2026
2Circuit Training Timer LiteCircuit Training Timer LiteFree4.8★ (468)NoYesSep 2026
3Circuit Training WorkoutCircuit Training WorkoutFreeYesYesMay 2026
4Interval TimerInterval TimerFree4.7★ (3.5K)NoYesSep 2026
5O2 — Breath Hold Apnea TrainerO2 — Breath Hold Apnea TrainerFreeNoYesSep 2026
6The Outsiders Fitness TrackerThe Outsiders Fitness TrackerFree4.6★ (125)NoYesSep 2026
7SimubusSimubusFreeNoYesSep 2026
8Circuit Simulator - VoltSimCircuit Simulator - VoltSimFree4.7★ (72)NoYesSep 2026

Top Picks for O2 Circuit Training

Circuit Training Timer Lite#2

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

Time and track your workouts
Strong Contender
💪 Health & Fitness
4.8😊(468 ratings)
FreeIn-App Purchases
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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

  • 👍 Highly customizable workouts
  • 🎶 Music integration
  • ⏱️ Flexible timer settings
  • 🔊 Voice prompts for exercises
  • 📚 Saved workout routines
  • 🔍 Detailed exercise tracking

Room to Improve

  • 🔋 Battery drain issues
  • 🔒 Limited functionality in free version
  • 🔇 Quiet audio prompts
  • 📈 Lack of workout history/progress tracking

More O2 Circuit Training apps to explore

FAQ about O2 Circuit Training

Are there free o2 circuit training apps for iPhone?
Yes — 20 of the top o2 circuit training apps we rank are free to download, including O2 CIRCUIT TRAINING and Circuit Training Timer Lite.
O2 CIRCUIT TRAINING has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 248+ o2 circuit training apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.