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Best 21 Days Challenge Apps

201+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated May 2026

Every iPhone needs a few good 21 days challenge apps. We benchmark 201+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for 21 Days Challenge

The 21 Days Challenge#1

The 21 Days Challenge by Kati Pereira

Introduce life changing habits
Editor's Choice
🌟 Lifestyle
4.7😊(499 ratings)
FreeAdsIn-App Purchases
The 21 Days Challenge screenshot 1
The 21 Days Challenge screenshot 2
The 21 Days Challenge screenshot 3
The 21 Days Challenge screenshot 4
The 21 Days Challenge screenshot 5
The 21 Days Challenge screenshot 6

Build lasting habits and transform your life over 21 days with guided challenges. Track your progress, journal your thoughts, and customize your avatar with earned points. Discover new routines for health, productivity, and happiness.

What We Love

  • 🚀 Simple and motivating
  • 👍 Clean design and clear progress tracking
  • 🤗 Genuinely helpful and enjoyable to use
  • 💫 Positive impact on mental health and habits

Room to Improve

  • 🔍 Lack of search option in community challenges
  • 🔀 Challenges disappear after creation, no way to find them
  • 🤖 Too many ads interrupting the experience
Habit Tracker#3

Habit Tracker by Inner Grow Limited

Goal Tracker & ADHD Planner
Worth Considering
📊 Productivity
4.8😊(143K ratings)
FreeIn-App Purchases
#82in Productivity
Habit Tracker screenshot 1
Habit Tracker screenshot 2
Habit Tracker screenshot 3
Habit Tracker screenshot 4
Habit Tracker screenshot 5
Habit Tracker screenshot 6

This app helps you build lasting habits and achieve your goals through simple daily planning and routine tracking. It offers features like syncing with health data, group challenges, and insightful analytics to support your self-care and personal growth journey.

What We Love

  • 👍 Customizable and user-friendly interface
  • 🚀 Efficient and intuitive habit tracking
  • 💡 Comprehensive data visualization and progress tracking
  • 🔒 Secure and reliable app with no ads

Room to Improve

  • 🐛 Occasional bugs and glitches
  • 🔒 Lack of iCloud sync and cross-device support
  • 🔒 Limited free version with restricted features

More 21 Days Challenge apps to explore

4
30 Day Fitness at Home
30 Day Fitness at Home
30 Day Fitness at Home
Home Workout for Women To Burn
Free

Achieve weight loss and muscle gain with personalized home workout plans and professional guides. This app offers a variety of exercises and customized routines, with an AI trainer to answer your fitness questions. See results in 30 days with zero equipment needed.

Personalized workout plansZero-equipment home workoutsAI fitness trainer
💪 Health & Fitness
(28K)
subscription
5
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 soft medium fitness tracker
Free

This app supports a 75-day self-improvement and fitness challenge. It helps users track their daily tasks, stay motivated, and connect with a community of fellow participants. Unlock advanced features with an optional subscription.

75-day challenge trackingProgress monitoringMotivation tools
💪 Health & Fitness
(8.2K)
freemium
6
Be fit 21 - Home workout app
Be fit 21 - Home workout app
Be fit 21 - Home workout app
Lose weight in 21 days
Free

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.

Home workoutsWeight loss programsMuscle toning exercises
💪 Health & Fitness
(613)
free with in-app purchases
7
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
by Beachbody, LLC
Free

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.

Nutrition tracking with colored containersDaily workout plan accessWater intake monitoring
💪 Health & Fitness
(2.5K)
free
8
21 Days Habit Transformation
21 Days Habit Transformation
21 Days Habit Transformation
Daily Routine & Goals Planner
Free
$5.99 | 100% OFF
💪 Health & Fitness
(0)
9
I am - Daily Affirmations
I am - Daily Affirmations
I am - Daily Affirmations
Developpement personnel
Free

This app helps you rewire your brain and build self-esteem through positive daily affirmations. Choose from various intentions and set reminders to cultivate a more resilient and positive mindset.

Daily affirmationsRewire negative thoughtsBuild self-esteem
💪 Health & Fitness
(720K)
free with in-app purchases
10
75 Day Challenge: Soft Edition
75 Day Challenge: Soft Edition
75 Day Challenge: Soft Edition
Form Healthy Habits in 75 Days
Free

This app guides users through a 75-day program to build healthy habits and develop resilience. It focuses on consistency and sustainable change for both physical and mental wellness, offering a balanced approach to self-improvement.

Build lasting healthy habitsStay motivated dailyVisualize progress
💪 Health & Fitness
(306)
freemium
11
21 Days Challenge
21 Days Challenge
21 Days Challenge
by Tung Bui Thanh
Free
💪 Health & Fitness
(0)
12
Workout for Women: Fit at Home
Workout for Women: Fit at Home
Workout for Women: Fit at Home
Home Workout: Yoga & Fitness
Free

Achieve your fitness goals with a personalized home workout program designed for women. Tone your body, burn fat, and lose weight with quick, effective routines and video guidance. No equipment is needed, making it easy to get fit anytime, anywhere.

Home workouts for womenWeight loss and fat burningNo equipment needed
💪 Health & Fitness
(28K)
subscription
13
21 Day Challenge
21 Day Challenge
21 Day Challenge
by Phanupong Sanmee
Free
🌟 Lifestyle
(0)
14
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Challenge For Fitness
Free

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.

21-day fitness and weight loss challengeNo equipment home workoutsCustomizable training plans
📊 Productivity
(16)
free with in-app purchases
15
Fabulous: Daily Habit Tracker
Fabulous: Daily Habit Tracker
Fabulous: Daily Habit Tracker
Morning Routines & ADHD Help
Free

Build healthy habits and routines to improve your life and mental well-being. This app offers daily coaching, journaling, and community support to help you achieve your goals.

Daily habit trackingMorning and evening routinesSelf-improvement coaching
💪 Health & Fitness
(88K)
free with in-app purchases
16
Productive - Habit Tracker
Productive - Habit Tracker
Productive - Habit Tracker
Daily Routine & Goals Planner
Free

Build positive habits and achieve your goals with this comprehensive planner. Track progress, engage in challenges, and gain insights to enhance your productivity and well-being.

Habit creation and managementPersonalized goal programsGuided challenges
📊 Productivity
(91K)
freemium
17
Flora - Green Focus
Flora - Green Focus
Flora - Green Focus
To-do list, habit tracker
Free

This app helps you stay off your phone, manage tasks, and build positive habits. Grow virtual trees as you focus on your goals, with options to block distracting apps and challenge friends. You can even plant real trees with partner organizations.

Focus timer with app blockingGamified habit trackingVirtual tree growth
📊 Productivity
(82K)
free with in-app purchases
18
one sec | screen time + focus
one sec | screen time + focus
one sec | screen time + focus
App & Website Limit, Blocker
Free

This app introduces intentional friction to distracting apps and websites, helping users reduce screen time and improve focus. It delays access rather than blocking, promoting long-term behavioral change. Integrates with other apps for enhanced productivity.

Adds friction to distracting appsDelays app access instead of blockingReduces app usage significantly
📊 Productivity
(23K)
freemium
19
Intermittent Fasting Tracker -
Intermittent Fasting Tracker -
Intermittent Fasting Tracker -
Fasting App: Lose Weight Fast
Free

This app helps users achieve sustainable weight loss and health goals through personalized intermittent fasting plans and an AI-powered calorie counter. It offers features like food scanning, hydration tracking, and detailed progress monitoring. Users can access science-based insights and healthy recipes to support their journey.

Personalized fasting plansAI calorie counter and food loggerWater and hydration tracker
💪 Health & Fitness
(28K)
freemium
20
Daily Habit & Routine Tracker
Daily Habit & Routine Tracker
Daily Habit & Routine Tracker
Goals planner. Productive days
Free

This app helps you build and maintain healthy habits and achieve your goals. Track your progress with streaks and calendars, set reminders, and invite friends to join you. Unlock premium features for unlimited customization and detailed statistics.

Create custom habitsTrack progress with streaksCalendar view of missed days
📊 Productivity
(4.7K)
free with in-app purchases

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