Out of 165+ kaizen challenge apps and games on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
Compare top Kaizen Challenge Apps & Games (July 2026)
Embark on a 50-day self-improvement journey inspired by popular fitness challenges. Build discipline and life-changing habits through daily actions like exercise, learning, and mindful eating. Track your progress and transform into the best version of yourself.
This AI-powered fitness app helps users track workouts, set personal records, and improve strength. It offers daily challenges, a unique ranking system, and AI-driven progress insights. Users can access a large exercise library with demo GIFs and create custom workout programs.
What We Love
💡 Gamification based on Solo Leveling
👍 Motivating and engaging workout experience
👍 Provides different workout options to prevent boredom
👍 Straightforward and helpful app
Room to Improve
🐛 Toxic community on Discord with arguments and threats
Engage in strategic turn-based battles against colossal monsters, utilizing unique character skills and devastating ultimate attacks. Explore the world and story of a popular anime, brought to life with stunning graphics and an all-star voice cast.
What are the best kaizen challenge apps & games for iPhone?
Project50: 75 Soft & Be Hard tops our kaizen challenge apps & games ranking as of July 2026, with a 4.0-star average from 1 App Store ratings, and it's free to download.
Are there free kaizen challenge apps & games for iPhone?
Yes — 20 of the top kaizen challenge apps & games we rank are free to download, including Project50: 75 Soft & Be Hard and Gym Rank: AI Workout Tracker.
Does Project50: 75 Soft & Be Hard have ads or in-app purchases?
Project50: 75 Soft & Be Hard has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
How many kaizen challenge apps & games are on the App Store?
We track 165+ kaizen challenge apps & games on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
What is Project50?
Project50 is a 50-day self-improvement challenge designed to help users build discipline and life-changing habits. It's inspired by popular trends like the 75 Soft and 75 Hard challenges, focusing on small daily actions for consistent growth.
What are the daily habits in Project50?
The challenge includes seven daily habits: waking up before 8 AM, following a morning routine, exercising for 1 hour, learning a new skill, reading 10 pages, eating healthy, and tracking progress.