Best 21 Days Habit Transformation Apps

233+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated May 2026

Finding the right 21 days habit transformation app can be overwhelming with so many options. We've analyzed 233+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for 21 Days Habit Transformation

Kaizen AI: Reset Life 66 Days#3

Kaizen AI: Reset Life 66 Days by Ankit Priyadarshi

Life Transformation in 66 Days
Worth Considering
💪 Health & Fitness
4.5(54 ratings)
FreeAdsIn-App Purchases
Kaizen AI: Reset Life 66 Days screenshot 1
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Kaizen AI: Reset Life 66 Days screenshot 6

This personal AI system helps you build daily habits, track progress, and achieve self-mastery through a gamified approach, providing tools for discipline, growth, and reflection. Start your journey to self-improvement today with a comprehensive daily system that includes habit tracking, AI-powered evaluations, and a journaling feature to capture your growth.

More 21 Days Habit Transformation apps to explore

4
Reload: Reset Life & Lock In
Reload: Reset Life & Lock In
Reload: Reset Life & Lock In
Transform Yourself In 60 Days
Free

Take back control of your time and stay focused with this intuitive app that helps you block distractions, rebuild discipline, and achieve your goals. By setting and tracking your goals, blocking apps, and using advanced features like NSFW protection, you can reclaim hours of your day, improve focus, and develop better habits.

💪 Health & Fitness
(814)
5
Lock In - Transform Yourself
Lock In - Transform Yourself
Lock In - Transform Yourself
Track habits over 75 days
Free
💪 Health & Fitness
(0)
6
Do Habits: Get It Done
Do Habits: Get It Done
Do Habits: Get It Done
Goals, Task & Habit Tracker
Free

Track and improve your daily habits and routines with our app. Set goals, track progress, and stay motivated to reach your targets. Download now and start building better habits today.

📊 Productivity
(2.2K)
7
Transform 75 : Hard Challenge
Transform 75 : Hard Challenge
Transform 75 : Hard Challenge
75 hard & 75 soft days tracker
Free
💪 Health & Fitness
(1)
8
(Not Boring) Habits
(Not Boring) Habits
(Not Boring) Habits
Science-backed habit tracker
Free

A science-backed habit tracker that focuses on repeated action rather than streaks or guilt. Guides users through 60 repetitions for lasting habit change, with no pressure or fake rewards - just good vibes towards self-improvement. Start your journey today!

💪 Health & Fitness
(5.6K)
9
Grit: Daily Habit Tracker
Grit: Daily Habit Tracker
Grit: Daily Habit Tracker
Routines & Goals ADHD Planner
Free

Create a daily habit-planning application that helps you stay on track with your goals by providing a user-friendly interface to schedule and track your habits with ease. Simplify your daily routine and boost productivity effortlessly.

📊 Productivity
(11K)
10
75 Soft Challenge™ Official
75 Soft Challenge™ Official
75 Soft Challenge™ Official
75 day custom fitness tracker
Free

Get motivated to stay active and improve your fitness with our 75-day challenge app. Track your progress, set goals, and engage with a supportive community to achieve your fitness goals. Join the challenge today and transform your fitness journey!

💪 Health & Fitness
(49)
11
DayStamp - Habit Tracker
DayStamp - Habit Tracker
DayStamp - Habit Tracker
Build Habits, Change Your Life
Free

Track your daily activities effortlessly with a simple and intuitive habit tracker app. Features include colorful interface, activity statistics, check-in memos, and no sign-up required. Start building good habits today!

📊 Productivity
(484)
12
Days Since: Quit Habit Tracker
Days Since: Quit Habit Tracker
Days Since: Quit Habit Tracker
Sober Time Clean Day Counter
Free

Track and break bad habits with a personalized counter. Stay motivated by seeing how long it has been since you last engaged in the habit you want to quit. Visit the website for more information.

💪 Health & Fitness
(18K)
13
Habitify: Habit Tracker
Habitify: Habit Tracker
Habitify: Habit Tracker
Build Your Routine & Streaks
Free

Keep track of your daily habits with ease using this intuitive habit tracking app. Set goals, create custom routines, and stay motivated with progress reports and reminders. Download now to start building a better daily routine!

💪 Health & Fitness
(6.9K)
14
Way of Life - Habit Tracker
Way of Life - Habit Tracker
Way of Life - Habit Tracker
Build a better, stronger you
Free

Track, identify, and change your habits effortlessly with this feature-rich habit tracker app. Build a better, stronger, and healthier you with powerful reminders, customizable tags, charts, and more. Take charge of your lifestyle now!

💪 Health & Fitness
(5.1K)
15
everyday - Habit Tracker
everyday - Habit Tracker
everyday - Habit Tracker
Daily Routine Checklist
Free

A habit tracking application that helps users form new habits and achieve goals by tracking daily routines and visualizing progress. Features include customizable boards, reminders, and at-a-glance progress visualization. Available on various platforms with the option to upgrade for premium features. Join everyday now to start building better habits!

📊 Productivity
(158)
16
Atoms - from Atomic Habits
Atoms - from Atomic Habits
Atoms - from Atomic Habits
The official Atomic Habits app
Free

Introducing Atoms – The Official Atomic Habits App! A powerful tool to help you build and track your habits effectively, designed to help you make lasting behavioral changes. Start your journey towards better habits today!

📊 Productivity
(10K)
17
The 21 Days Challenge
The 21 Days Challenge
The 21 Days Challenge
Introduce life changing habits
Free

"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!"

🌟 Lifestyle
(499)
18
Habitat - Daily Habit Tracker
Habitat - Daily Habit Tracker
Habitat - Daily Habit Tracker
Set Goals and Track Progress
Free

Track your daily habits and stay motivated with our Habit Tracker app, based on the 'Don't break the chain!' method. Set goals, monitor progress, and create lasting routines easily. Upgrade to unlock more features and personalize your tracking experience.

📊 Productivity
(339)
19
Bad Habit Break
Bad Habit Break
Bad Habit Break
Quit Smoking & Drinking Easily
Free

Bad Habit Break is an app designed to help you quit smoking by tracking your progress, providing motivational reminders, and offering support through a community of users on the same journey. Take control of your health and kick the smoking habit for good!

🌟 Lifestyle
(516)
20
iBetter · Habit Tracker
iBetter · Habit Tracker
iBetter · Habit Tracker
7 Days to Develop a Habit
Free

Develop lasting habits with the iBetter Habit Tracker app. Get on track with your life plan and achieve your goals in just 7 days. Start building good habits today!

📊 Productivity
(448)