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Best The 21 Days Challenge Apps

191+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated June 2026

If you already know The 21 Days Challenge, this is the deeper bench. 191+ the 21 days challenge apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.

Top Picks for The 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
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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#2

Habit Tracker by Inner Grow Limited

Goal Tracker & ADHD Planner
Strong Contender
📊 Productivity
4.8😊(143K ratings)
FreeIn-App Purchases
#82in Productivity
Habit Tracker screenshot 1
Habit Tracker screenshot 2
Habit Tracker screenshot 3
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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 The 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
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
7
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
8
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
9
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
10
21 Days Habit Transformation
21 Days Habit Transformation
21 Days Habit Transformation
Daily Routine & Goals Planner
Free
$5.99 | 100% OFF
💪 Health & Fitness
(0)
11
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
12
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
13
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
14
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
15
Home Fitness Coach: FitCoach
Home Fitness Coach: FitCoach
Home Fitness Coach: FitCoach
Daily Workouts for Weight Loss
Free

This app provides personalized daily workouts and training plans to help users achieve their fitness goals, such as weight loss and toning. It offers features like step tracking, audio prompts, and workout history to support a healthy lifestyle without requiring gym visits.

Personal training plansStep trackerWorkout history
💪 Health & Fitness
(65K)
subscription
16
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
17
Wall Pilates by Fit & Lean
Wall Pilates by Fit & Lean
Wall Pilates by Fit & Lean
30 Day Home Workout Challenge
Free

This app offers a 30-day home workout challenge using a wall for added resistance and support. It targets various problem areas, improves posture, strengthens the core, and enhances flexibility. Ideal for beginners and those seeking low-impact exercises.

30-day home workout challengeWall-assisted Pilates exercisesTargets glutes, legs, core, and more
💪 Health & Fitness
(1.3K)
subscription
18
21-Day Shape-Up Plan
21-Day Shape-Up Plan
21-Day Shape-Up Plan
Shape-Up Workout Plan at Home
Free
💪 Health & Fitness
(0)
19
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
20
Wall Pilates: 28 Day Challenge
Wall Pilates: 28 Day Challenge
Wall Pilates: 28 Day Challenge
Workout at Home
Free

This app offers a guided Pilates program using wall support for enhanced workouts. It provides personalized plans, expert video instruction, and progress tracking to improve posture, flexibility, and core strength. Achieve fitness goals and mental wellbeing from home.

Personalized workout plansExpert video tutorialsProgress tracking
💪 Health & Fitness
(1.9K)
free with in-app purchases