Simple Circuit Interval Timer is an easy-to-use fitness interval timer app for your High Intensity Interval Training (HIIT timer) gym & home workouts and yoga practises.

Working from home? Need some exercise?

Simple Circuit Interval Timer is an easy-to-use fitness interval timer app for your High Intensity Interval Training (HIIT timer) workouts and yoga practises.

Now also includes PLANK CHALLENGE APP- a daily challenge to encourage working out at home with one of the best core strengthening and fitness activities available, with no gym equipment needed! Customize intervals to suit your needs.

PLANK A DAY Daily Planking Challenge - are you down?

Join the challenge - plank for up to 1 minute, every hour, every day
Fun and easy home workout
Lots of variations to try
Set your own workout schedule and times
Play with family and friends, or by yourself
Helpful and fun reminders (but you can totally turn them off)
Customized workouts
Plank Challenge is for beginners and pros alike
Healthy lifestyle benefits and results!

High Intensity Interval Training Timer for all sports and activities

Lots of people use circuit training for weight loss and strength training

Regular circuit, HIIT, and Tabata intervals
AMRAP and Supersets
Hold yin yoga and pilates poses
Cardio (spinning, running) intervals and Calisthenics
For use at home and in the gym
Plank and core training exercises
Push-ups and pull-ups
Boxing rounds
WOD and x-fit
7 Minute workouts (and longer!)
Meditation and breathing
Great for working out at home and exercises without equipment

Fitness Features

Set number of sets, and repeating interval timers for circuits and rest periods
REP meter to help to maintain your pace
Colorful, customizable themes
Helpful countdowns in and out of each circuit
Workout offline, anywhere

Stunning visuals

Awesome color themes
GLOW UP MODE for a little razzle-dazzle
Mesmerizing animations
Circular or Squircular layouts
Big and clear interfaces
Simple, intuitive menus


Unlock PRO MODE to access all themes, colors, layouts and features forever
Be the first to get access to new features

Maximize your workout with this free fitness interval timer. Keep that heart pumping!


Planking is one of *the top exercises* that anyone can do, anywhere, anytime! Planking challenges every one of your major muscle groups and has dozens of benefits.

Ab definition and core strength - including obliques (side abs)
Overall strength and full body fitness and strength
Improved posture
Greater flexibility and balance
Body weight training of any kind improves weight lifting performance, improves cardiovascular health
Relief from back pain and muscle tension
Decrease risk of back injuries
Improved metabolism
Feel happier with exercise
Great results for toned abs, butts, arms and legs

Take a break from work and exercise while working from home with the PLANK CHALLENGES APP

What’s New

Version 1.3

Daily challenge calendar to track circuit training progress up to 30 day plank challenges!
Super hero and villian inspired color themes!
Improved interval circuit trainer timer lite
Healthy tips & treats

App Privacy

The developer, Timothy Shepherd, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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