Best 21 Days Challenge Apps

Home workoutsWeight loss programsMuscle toning exercises

This app offers home workouts designed to help users lose weight, build muscle, and improve overall fitness. It features 50 exercises across three difficulty levels, with programs structured over 21 days to build consistent habits.

free with in-app purchases

(613)

21 Days Habit Transformation

Daily Routine & Goals Planner

21 Days Challenge with Zenzo

Turning Goals into Habits

📊 Productivity

AI-powered challenge tracker

21 Days – AI Challenge

PEAK 75 hard challenge tracker

Habit, Discipline, Routine

Choose from pre-set or custom challengesTrack workouts, water intake, reading, and moreVisualize progress with daily checklists

This app helps you complete popular 75-day challenges by tracking daily habits and progress. Choose from pre-set routines or create your own custom challenge to build discipline and achieve your goals.

21-Day Sugar-Free Challenge

$0.99

🌟 Lifestyle

21 Day Fix® Tracker – Official

by Beachbody, LLC

Nutrition tracking with colored containersDaily workout plan accessWater intake monitoring

Easily monitor your nutrition and workouts with this official tracker. Log colored containers for meals, track water intake, and access daily workout plans. Monitor progress with body measurements and maintain your results with a dedicated maintenance mode.

21 Day Challenge For Fitness

(2.5K)

free

21 Day Fitness at Home

21-day fitness and weight loss challengeNo equipment home workoutsCustomizable training plans

This app offers a 21-day fitness challenge designed for women, providing at-home workouts without equipment. It features customizable plans, progress tracking, and voice-guided coaching to help users achieve their fitness and weight loss goals.

📊 Productivity

(17)

free with in-app purchases

This app helps you build lasting habits by tracking your daily progress on up to 100-day challenges. Customize your goals with themes and layouts, and share your achievements. Widgets offer at-a-glance progress updates.

Track multiple 100-day challengesHome screen widgets for progressCustomizable color themes

🔧 Utilities

30 Days - challenge yourself

free

75 Days Challenge - Rethrive

Soft, Hard & Tough Routines

21-Day Happiness Challenge

Feel better in minutes a day!

🌟 Lifestyle

75 Day Hard Challenge - Hard75

Life Reset & Progress Tracker

Multiple challenge levels (Hard, Medium, Soft)Custom challenge builderDaily task tracking

This app offers customizable challenge programs, including 75 Hard, Medium, and Soft, to help users build discipline and transform their lives. Track daily tasks, visualize progress with analytics, and document your journey with a photo gallery and sharing features.

75 Medium, Hard & Soft Tracker

(1)

freemium

75 Day Tough Challenge

Track 75 Soft, Medium, or Mom challengesCustomize up to 6 daily habitsVisual streak and progress tracker

This app helps you build discipline and track habits for various 75-day challenges, including 75 Soft, 75 Medium, and 75 Mom. It offers customizable habit tracking, progress visualization, and smart reminders to keep you consistent and accountable.