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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"Transform your life with 21-day challenges to cultivate new habits. Choose from a variety of challenges, track your progress, earn points for customization, and journal daily for a healthier mind. Download now and start your journey to a happier self!"

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😊(142K ratings)
FreeIn-App Purchases
#96in Productivity
Habit Tracker screenshot 1
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Track your daily habits, set goals, and monitor your progress with this handy habit-tracking app. Stay motivated and achieve your objectives easily. Start tracking today!

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

Get in shape with our 30-day home fitness program designed for men. Work out anytime, anywhere with personalized routines and progress tracking. Start your fitness journey today!

💪 Health & Fitness
(28K)
5
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 Days Challenge Tough & Soft
75 soft medium fitness tracker
Free

Embark on a 75-day challenge to push your limits with daily tasks focused on physical activity, mental well-being, and personal growth. Join now to begin your journey towards self-improvement and achieve lasting transformation.

💪 Health & Fitness
(7.6K)
6
I am - Daily Affirmations
I am - Daily Affirmations
I am - Daily Affirmations
Developpement personnel
Free

Experience daily affirmations with our app, designed to rewire your mindset with positive self-talk and empower you to reach your goals. Get started on a journey of self-discovery and resilience today. Subscribe for premium content and unlock the full potential of affirmations.

💪 Health & Fitness
(13K)
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

Get in shape and lose weight with a home workout app offering 21-day training programs suitable for all fitness levels. Access 50 exercises designed by professional trainers to help you reach your fitness goals in just three weeks. Start your fitness journey today!

💪 Health & Fitness
(613)
8
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
21 Day Fix® Tracker – Official
by Beachbody, LLC
Free

Track your nutrition, workouts, and progress effortlessly with this all-in-one app. Stay on top of your daily meals, water intake, workouts, and body measurements with ease. Take charge of your fitness journey today!

💪 Health & Fitness
(2.5K)
9
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Fitness at Home
21 Day Challenge For Fitness
Free

Get fit and lose weight in just 21 days with a customizable at-home workout plan that requires no equipment and suits all fitness levels. Challenge yourself with easy-to-follow exercises, track progress, and achieve your goals with the help of a virtual fitness coach and personalized reminders.

📊 Productivity
(16)
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

Track your daily habits with ease using this personalized habit tracker. Stay motivated to complete your morning routines and achieve your goals effortlessly. Download now and start building better habits today!

💪 Health & Fitness
(88K)
12
75 Day Challenge: Soft Edition
75 Day Challenge: Soft Edition
75 Day Challenge: Soft Edition
Form Healthy Habits in 75 Days
Free

Embark on a transformative journey with an app designed to help you build better habits and resilience in just 75 days. Stay motivated, track your progress, and achieve lasting change by taking control of your personal growth. Download now to start your path towards becoming the best version of yourself.

💪 Health & Fitness
(306)
13
Intermittent Fasting Tracker -
Intermittent Fasting Tracker -
Intermittent Fasting Tracker -
Fasting App: Lose Weight Fast
Free

An intuitive fasting app that guides you through various fasting plans to help you lose weight effectively and feel more active. With features like timers, statistics tracking, and personalized insights, it supports both beginners and experienced users on their fasting journey. Subscribe to access all features for personalized fasting experience.

💪 Health & Fitness
(28K)
14
Workout for Women: Fit at Home
Workout for Women: Fit at Home
Workout for Women: Fit at Home
Home Workout: Yoga & Fitness
Free

This fitness app offers quick and effective workouts specifically designed for women to help burn fat, tone muscles, and improve overall health. With features like music-enhanced workouts, video guidance, progress tracking, and personalized coaching tips, it stands out as a top choice for women looking to achieve their fitness goals. Try it now for a better you!

💪 Health & Fitness
(28K)
15
Home Fitness Coach: FitCoach
Home Fitness Coach: FitCoach
Home Fitness Coach: FitCoach
Daily Workouts for Weight Loss
Free

Get in shape with a personalized fitness app designed for weight loss and toning. Features include personal training plans, step tracker, workout history, and audio prompts. Start your fitness journey today!

💪 Health & Fitness
(65K)
16
Daily Habit & Routine Tracker
Daily Habit & Routine Tracker
Daily Habit & Routine Tracker
Goals planner. Productive days
Free

Start building healthy habits effortlessly with a habit tracker app. Set goals, track progress, and stay motivated with daily reminders and detailed statistics. Install now and transform your life with the help of this powerful tool.

📊 Productivity
(4.7K)
17
Wall Pilates by Fit & Lean
Wall Pilates by Fit & Lean
Wall Pilates by Fit & Lean
30 Day Home Workout Challenge
Free

Experience personalized virtual Pilates sessions with Wall Pilates by Fit, tailored to your fitness level and schedule. Get started today to strengthen your core, improve flexibility, and achieve your fitness goals.

💪 Health & Fitness
(1.3K)
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

An app that helps you track and manage your screen time for better focus and productivity. Take control of your digital habits today!

📊 Productivity
(23K)
20
Wall Pilates: 28 Day Challenge
Wall Pilates: 28 Day Challenge
Wall Pilates: 28 Day Challenge
Workout at Home
Free

Experience personalized pilates workouts with Wall Pilates app - includes tailored plans, expert guidance, progress tracking, and benefits like improved posture and core strength. Start your journey to a stronger, healthier you today.

💪 Health & Fitness
(1.9K)