21DaysOfChange vs Streak21
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
21DaysOfChange
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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
Streak21
Build consistent habits with a simple, pressure-free tracker. Focus on showing up daily for 21-day cycles without complicated systems or scores. Designed for quiet structure and long-term consistency.
- Track habits in 21-day cycles
- Simple daily yes/no check-ins
- Streak-based progress
- Minimalist interface
- Optional reminders
- Designed for long-term consistency
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Streak21 is a simple habit tracker built around one idea: consistency matters more than intensity. There are no scores, no pressure, and no complicated systems. Just show up, one day at a time. Streak21 helps you build habits in calm 21-day cycles. You track whether you showed up — not how perfectly you performed. Features: • Track habits in focused 21-day cycles • Simple daily yes/no check-ins • Streak-based progress, no scores • Clean and minimal interface • Optional reminders • Designed for long-term consistency Streak21 is for people who want less pressure and more quiet structure in their daily life. Terms of Use（EULA）: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Streak21 at every 4 weeks against 21DaysOfChange's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $5.99 per month and Streak21 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
21DaysOfChange ships an update every 9 months, Streak21 every 4 weeks. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.
| Parameter | 21DaysOfChange | Streak21 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 — better | 16.6 |
| Further details — not scored | ||
| Size | 59 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Hong Son Vu | Wuhan smart mofun Technology Co., Ltd. |
In-app purchases
21DaysOfChange
- 21DaysOfChange Monthly Premium$5.991 Month
- 21DaysOfChange Monthly Business$17.991 Month
- 21DaysOfChange Yearly Premium$71.991 Year
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- 21DaysOfChange Yearly Business$214.991 Year
Streak21
- Streak21 Premium (Monthly)7 Days trial$2.991 Month
- Streak21 Premium (Annual)7 Days trial$9.991 Year
- Streak21 Premium (Lifetime)$24.99
