Comparison

21DaysOfChange vs 21 Days

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

21DaysOfChange

Features
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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

About

21 Days

Features
Read 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:** โ€ข 21-day habit quitting tracker โ€ข Progress color that changes from red to green โ€ข Daily motivational notifications โ€ข Simple and clean user experience โ€ข Personal goal tracking โ€ข Motivation support against bad habits Give yourself a chance for 21 days. Start big changes with small steps.

Screenshots

21DaysOfChange4 screens
21 Days4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

21DaysOfChange ships an update every 9 months, 21 Days fortnightly. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard3 real differences ยท 3 level
21DaysOfChange versus 21 Days: the parameters behind the verdict, then further details
Parameter21DaysOfChange21 Days
PriceFreeFree
Update frequencyEvery 9 monthsFortnightly โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.413.0 โ€” better
Further details โ€” not scored
Size59 MB32 MB
Age rating4+4+
DeveloperHong Son VuGIZEM CEVIK

In-app purchases

4 purchases

21DaysOfChange

Subscriptions4
  • 21DaysOfChange Monthly Premium$4.991 Month
  • 21DaysOfChange Monthly Business$12.991 Month
  • 21DaysOfChange Yearly Premium$34.991 Year
Show 1 more
  • 21DaysOfChange Yearly Business$89.991 Year
None

21 Days

No in-app purchases

Questions

Is 21DaysOfChange free?
21DaysOfChange is free to download, with in-app purchases available.
Is 21 Days free?
21 Days is free to download, with no in-app purchases.
Do 21DaysOfChange or 21 Days have ads?
Neither 21DaysOfChange nor 21 Days shows ads.
Which is updated more often, 21DaysOfChange or 21 Days?
21DaysOfChange ships an update every 9 months, and 21 Days fortnightly. Most recently, 21DaysOfChange was updated on October 21, 2026 and 21 Days on October 25, 2026.

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