force4change vs May Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
force4change
This app uses data science and machine learning to help you understand your emotions and their triggers. By logging quick 'mindtags' about your feelings and their causes, you can gain insights into patterns and improve your self-awareness. It offers inspiring content to support your journey towards inner peace and self-improvement.
- Data-driven emotional analysis
- Machine learning for insights
- Quick 'mindtag' logging
- Pattern identification
- Personalized self-improvement
- Inspiring content
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We live in a distracted, busy world that masks our true selves and hides our emotional triggers from us. A solution rooted in data science is finally here. force4change reveals the impact of people, activities, places and events on you and your emotions. The app’s data driven approach, life analytics and the machine learning powering it, mean that it can help you out in a pinch, when you need a quick way to get back into a good headspace. Quantifying your emotions and the causal factors behind them also makes it a great tool for longer term self improvement. Central to our app and approach are what we call “mindtags” - basically short captures of your emotions and their underlying causes throughout the day. Adding a mindtag takes less than a minute and logging an entry with multiple mindtags takes 1-3 minutes. Mindtagging allows us to gain a full picture of you that gets richer and more helpful over time. As you enter more mindtags and your reflection collection grows, details and patterns emerge that would otherwise get lost in the buzz of life. And while we’re all about inner peace, pretty pastel colors, and helping you be the best you, we firmly believe regular effort, actionable data and understanding emotional triggers are keys to progress. We go beyond simply tracking and documenting you. We give you access to inspiring content that will help you along the road. ––––––––––––––––––––––––––– Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy http://www.invoodoo.com/privacy-policy Terms of Use http://www.invoodoo.com/terms-of-use
May Diary
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MayDiary is your personal space for safe and smart journaling. It combines classic diary writing with cutting-edge artificial intelligence technologies that help you better understand your experiences, emotions, and life patterns. KEY FEATURES: AI ANALYSIS & TRENDS: Get intelligent summaries of your past week, month, or year. MayDiary analyzes your moods, identifies key moments, and uncovers trends you might otherwise miss in regular text. SMART TRANSCRIPTION: Capture your thoughts faster than you can forget them. Use Apple’s lightning-fast local transcription or the advanced OpenAI cloud engine for precise formatting of dictated text. SMART TAGS: Organize your entries with fully integrated tags throughout the app. Add tags manually or let AI suggest them. You can then filter by tags or use them for more accurate AI analysis. NATURAL SEARCH: Can’t remember when you wrote about something? Just ask. The AI filter finds entries based on their actual meaning and topics, not just exact words. PRIVACY FIRST: Your diary belongs to you alone. Data is securely stored in the app’s sandbox and protected by iOS system encryption. If you use sync, entries are saved to your private iCloud database linked to your Apple ID. You can also secure access to your diary with Face ID or Touch ID. MODERN EDITOR: Enjoy a clean and clear environment with Markdown support for perfect structure in your notes. NO ADS, NO DATA COLLECTION: MayDiary was created as an independent project with a focus on user experience. The app is free, contains no ads, and your texts are never used to train AI models. WHY MAYDIARY? Unlike ordinary diaries, MayDiary helps you find meaning in your writing. It’s a digital companion for personal growth that holds up a mirror and provides practical recommendations for your wellbeing and mental health. NOTE: To use AI features, you will need your own OpenAI key. Instructions can be found directly in the app.
Screenshots
Verdict
The clearest difference is update cadence: May Diary at every 2 weeks against force4change's monthly. 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. force4change sells 3 in-app purchases, starting at $5.99 per month and May Diary sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
force4change ships an update monthly, May Diary every 2 weeks. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.
| Parameter | force4change | May Diary |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (64 ratings) — better | — |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 64 — better | — |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 — better | 18.4 |
| Further details — not scored | ||
| Size | 65 MB | 12 MB |
| Age rating | 4+ | 12+ |
| Developer | InVooDoo LLC | PETR HAZUZA |
In-app purchases
force4change
- InVooDoo One$5.991 Month
- Month Full Access Membership$9.991 Month
- Year Full Access Membership$89.991 Year
May Diary
- Buy Me a Coffee$0.99
- Support Development$2.99
- Big Thank You$4.99









