Best O2 Circuit Training Apps

210+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated April 2026

Whether you're new to o2 circuit training or looking for an upgrade, our curated collection of 210+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for O2 Circuit Training

TrainerRoad#2

TrainerRoad by Trainer Road, LLC

Cycling Training App
Strong Contender
๐Ÿ’ช Health & Fitness
4.9๐Ÿ˜Š(21K ratings)
FreeAdsIn-App Purchases
TrainerRoad screenshot 1
TrainerRoad screenshot 2
TrainerRoad screenshot 3
TrainerRoad screenshot 4
TrainerRoad screenshot 5
TrainerRoad screenshot 6

Train harder and smarter with our cycling training app, offering personalized plans tailored to your needs. Join now for a 30-day risk-free trial and experience expert coaching, customized workouts, and performance tracking to help you reach new levels of cycling success.

What We Love

  • ๐Ÿš€ Makes Training Dead Simple
  • ๐Ÿš€ Continual Improvement
  • ๐Ÿš€ Excellent Training Platform
  • ๐Ÿš€ Transformational and Uplifting

Room to Improve

  • ๐Ÿ› Horrible App, Constantly Crashing
  • ๐Ÿ› App is Always Slow and Buggy
  • ๐Ÿ”‹ Expensive Compared to Alternatives
Timer Plus - Workouts Timer#3

Timer Plus - Workouts Timer by ArGames

Fitness ร  la maison, gym
Worth Considering
๐Ÿ’ช Health & Fitness
4.8๐Ÿ˜Š(91K ratings)
FreeAds
Timer Plus - Workouts Timer screenshot 1
Timer Plus - Workouts Timer screenshot 2
Timer Plus - Workouts Timer screenshot 3
Timer Plus - Workouts Timer screenshot 4
Timer Plus - Workouts Timer screenshot 5

Timer Plus is an interval training timer app perfect for HIIT and Tabata workouts, offering features like round and cycle display, interval stopwatch, background mode, screen flash, voice guidance, and Apple Watch integration. Ideal for home, gym, boxing, MMA, and bodyweight exercises. Get started with Timer Plus for efficient fitness training.

What We Love

  • ๐Ÿš€ Simple and easy to use
  • ๐Ÿ‘ Properly free, no hidden costs
  • ๐Ÿ‘ Customizable settings
  • ๐Ÿ‘ User-friendly interface

Room to Improve

  • ๐Ÿ› Music volume issues
  • ๐Ÿ› Difficulty finding saved timers
  • ๐Ÿ› Inconsistent notification alerts

More O2 Circuit Training apps to explore

4
Interval Timer
Interval Timer
Interval Timer
Tabata, HIIT, Circuit Training
Free

An intuitive Interval Timer app for Tabata, HIIT, and Circuit Training with customizable settings, voice assistant, saved workouts, and quick setup feature. Supports Apple Health for activity tracking. Download for free with subscription option available. Good luck with your training!

๐Ÿ’ช Health & Fitness
(3.2K)
5
Seconds Pro Interval Timer
Seconds Pro Interval Timer
Seconds Pro Interval Timer
Tabata, HIIT, Circuit Training
$7.99

Get the ultimate interval timer for various workouts like Tabata, HIIT, and circuit training with Seconds Pro. Enhance your workout routines with precision timing and customization options.

๐Ÿ’ช Health & Fitness
(11K)
6
Circuit Training Timer Lite
Circuit Training Timer Lite
Circuit Training Timer Lite
Time and track your workouts
Free

Track your workouts with a customizable timer that supports heart rate training, location tracking, and interval-based exercises. Save and sync your workout data, customize intervals with music and colors, and enjoy features like Apple Health integration and iCloud synchronization. Download now for a focused workout experience.

๐Ÿ’ช Health & Fitness
(449)
7
TrainingPeaks
TrainingPeaks
TrainingPeaks
Triathlon, Cycling, Running
Free

Achieve your fitness goals with our training app designed for endurance athletes. Easily track and sync your workouts, set personalized goals, and analyze your performance data to reach your peak potential. Subscribe now for premium features to unlock even more training benefits.

๐Ÿ’ช Health & Fitness
(2.1K)
8
ICG Training
ICG Training
ICG Training
Your Powerful Personal Trainer
Free

Get the ultimate personal training experience with the ICG Training app. Whether you're working out at home, on the gym floor, or in a cycling class, this app with the Coach By Colorยฎ System caters to all your fitness needs. Start your training journey today!

๐Ÿ’ช Health & Fitness
(2.2K)
9
Fresh Start Training
Fresh Start Training
Fresh Start Training
short bursts of training
Free

Boost your team's performance with short, personalized training sessions using our mobile app. Enhance learning through daily tasks, games, and rewards, while tracking progress and gaining valuable insights. Start your journey to better training today!

๐Ÿ’ผ Business
(122)
10
Wahoo SYSTM
Wahoo SYSTM
Wahoo SYSTM
Complete indoor training app
Free

Subscribe to Wahoo X for full access to the ultimate indoor training app designed for cyclists, triathletes, and endurance athletes. Get personalized workouts, training plans, immersive experiences like 'ProRides' and expert guidance from Wahoo's team of coaches and sports scientists. Join the Wahoo X Forum to interact with other athletes and elevate your training to the next level.

๐Ÿ’ช Health & Fitness
(2.6K)
11
Tacx Trainingโ„ข
Tacx Trainingโ„ข
Tacx Trainingโ„ข
Outdoor cycling indoors
Free

Revolutionize indoor cycling with this app that offers a virtual cycling experience like no other. Connect your Tacx Smart trainer to access a wide range of training films, create custom workouts, and track your performance data seamlessly. Choose from free or premium versions for even more features like high-quality video workouts and live opponents. Download now for an immersive cycling experience indoors.

๐Ÿ’ช Health & Fitness
(16K)
12
Wahoo
Wahoo
Wahoo
Workout & Fitness Tracker
Free

Wahoo is a comprehensive workout tracking app designed to help users monitor their fitness progress, set goals, and access detailed statistics. Stay motivated and reach your fitness goals with Wahoo today!

๐Ÿ’ช Health & Fitness
(43K)
13
Training Connect
Training Connect
Training Connect
Validate your NYC DOB TC Card
Free

This application validates training connect cards, ensuring they are legitimate and functional. Try it out to verify your training connect card's authenticity.

๐Ÿ“Š Productivity
(43)
14
LBs Circuit Training
LBs Circuit Training
LBs Circuit Training
by Lindsay Bowman
Free

This fitness application offers circuit training for people of all ages and sizes, providing a flexible pay-as-you-go membership with no contracts or automatic withdrawals. Users can join a community, access personal training, and take control of their health and well-being by downloading the app.

๐Ÿ’ช Health & Fitness
(14)
15
Map My Run GPS Running Tracker
Map My Run GPS Running Tracker
Map My Run GPS Running Tracker
5K 10K, Half Marathon Training
Free

Track your runs, set goals, and monitor progress with the ultimate GPS running app by Under Armour. Join a community of runners, track routes, and challenge yourself to improve your performance. Start achieving your fitness goals today!

๐Ÿ’ช Health & Fitness
(738K)
16
iBiker Cycling & Heart Trainer
iBiker Cycling & Heart Trainer
iBiker Cycling & Heart Trainer
Do heart rate training right!
Free

Get ready to optimize your cycling experience with our innovative app that tracks your route, distance, speed, and calories burned. Join us now to elevate your biking routines!

โšฝ Sports
(1.6K)
17
ErgData
ErgData
ErgData
by Concept2, Inc.
Free

Easily set up and track workouts, view customized stats, sync with Concept2 Online Logbook, and take part in challenges with this personal training partner app. Features include compatibility with Apple Watch, detailed post-workout analysis, and voice guidance for workout data. Compatible with Concept2 rowing, skiing, and biking ergometers, it connects to Apple Health and PM5 via Bluetooth.

๐Ÿ’ช Health & Fitness
(1.2K)
18
Final Surge
Final Surge
Final Surge
Running, Cycling & Triathlon
Free
๐Ÿ’ช Health & Fitness
(115)
19
Morpheus Training
Morpheus Training
Morpheus Training
by Morpheus Labs INC
Free

This app is designed to enhance cardio training, recovery, and fitness improvement through personalized heart rate zones, zone-based interval training, and recovery score management. It helps users optimize their workout intensity and volume for better conditioning and performance by providing tailored heart rate targets based on individual fitness levels and goals. Unlocking weekly zone targets requires the Morpheus HRM for accurate data calculation and recovery insights.

๐Ÿ’ช Health & Fitness
(146)
20
Humango: AI Training Planner
Humango: AI Training Planner
Humango: AI Training Planner
Smarter Training, Every Day
Free

Discover your personalized fitness journey with a social wellness platform that creates adaptive training plans using AI and fitness tracker data. Enhance your performance and enjoy your favorite sports like never before. Visit humango.ai to start your fitness transformation today.

๐Ÿ’ช Health & Fitness
(63)