21DaysOfChange vs 21 Days
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
21DaysOfChange
Read full descriptionHide full description
With our clear guidance and a bit of fun, we'll help you transform your habits into something you can be proud of. Imagine growing a tree - starting small, nurturing it daily, and watching it flourish. In just 21 days, you'll cultivate a new habit with tips and strategies that will last a lifetime. Join us on this transformative journey and take control of your lifestyle, one habit at a time. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.21daysofchange.app/privacypolicy
21 Days
Read full descriptionHide full description
**21 Days: Quit Bad Habits** is a simple and motivating counter app designed to support you on your journey to breaking bad habits. Set a goal, start your 21-day counter, and track your progress every day. The counter begins in red and gradually turns green as the days pass, allowing you to visually see your improvement and stay motivated. The app also sends motivational notifications throughout the process to help you stay focused on your goal. By reminding you of your progress every day, it encourages you to stay committed and build stronger habits. **Key Features:** โข 21-day habit quitting tracker โข Progress color that changes from red to green โข Daily motivational notifications โข Simple and clean user experience โข Personal goal tracking โข Motivation support against bad habits Give yourself a chance for 21 days. Start big changes with small steps.
Screenshots
Verdict
The clearest difference is in-app purchases: 21 Days at none against 21DaysOfChange's 4. 21 Days also leads on update cadence (fortnightly vs every 9 months) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $4.99 per month. 21 Days asks for nothing beyond the download.
21DaysOfChange ships an update every 9 months, 21 Days fortnightly. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.
| Parameter | 21DaysOfChange | 21 Days |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 months | Fortnightly โ better |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 16.4 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 59 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Hong Son Vu | GIZEM CEVIK |
In-app purchases
21DaysOfChange
- 21DaysOfChange Monthly Premium$4.991 Month
- 21DaysOfChange Monthly Business$12.991 Month
- 21DaysOfChange Yearly Premium$34.991 Year
Show 1 moreShow fewer
- 21DaysOfChange Yearly Business$89.991 Year
21 Days
No in-app purchases









