AiDA vs 21DaysOfChange
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AiDA
This app combines a multifunctional diary with AI-powered dream interpretation and personalized horoscopes. It aids in self-understanding and personal development by organizing thoughts, events, and dreams into categories, offering secure access to your data.
- Multifunctional diary with categories
- AI dream interpretation
- Personalized horoscope
- Self-understanding and personal development tools
- Password lock and local backup
- Multilingual support
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Our unique app AiDA offers you not just a diary, but a whole world of opportunities for self-discovery and life organization. Here’s why you should try it: 1. Multifunctional Diary: * Categories for all aspects of your life: Record your thoughts, events and dreams in convenient categories. Your notes will always be in order! 2. AI Dream Interpretation: * Uncover the secrets of your dreams: Our AI will help you understand the hidden meanings of your dreams. Just record your dream and get a detailed interpretation! 3. Personalized Horoscope: * A horoscope that takes your personal context into account: Get an astrological forecast tailored just for you. Find it out and make more informed decisions. 4. Improved Self-Understanding and Personal Development: * Analyze and develop: Keep a diary to better understand your emotions, goals, and achievements. Our tools will help you become the best version of yourself. 5. Convenience and Security: * Your data is securely protected: All entries are stored securely, and only you have access to them. Use the app anytime, anywhere. Extra: - password lock - local backup - Knowledge base Multilingual support: English, Arabic, Bulgarian, Chinese, Czech, German, Spanish, French, Hindi, Hungarian, Indonesian, Italian, Portuguese, Ukrainian, Russian, Swedish, Turkish
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
Screenshots
Verdict
The clearest difference is in-app purchases: AiDA at none against 21DaysOfChange's 4. AiDA also leads on update cadence (every 10 days vs every 9 months) and iOS requirement (12.0 vs 16.4). On price, ads 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 $4.99 per month. AiDA asks for nothing beyond the download.
AiDA ships an update every 10 days, 21DaysOfChange every 9 months. Both last shipped on October 30, 2026.
| Parameter | AiDA | 21DaysOfChange |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 67 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | RUSLAN DZHANSAKOV | Hong Son Vu |
In-app purchases
AiDA
No in-app purchases
21DaysOfChange
- 21DaysOfChange Monthly Premium$4.991 Month
- 21DaysOfChange Monthly Business$12.991 Month
- 21DaysOfChange Yearly Premium$34.991 Year
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- 21DaysOfChange Yearly Business$89.991 Year
