Solid Diary vs Clastly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solid Diary
This private journal app offers AI-powered insights into your thoughts and emotions. Secure your entries with encryption and biometric locks. Organize your reflections with formatting, tags, and unlimited uploads of images, voice, and sketches.
- 100% private and encrypted diary
- AI analysis for deeper insights
- Unlimited image, voice, and sketch uploads
- Formatting and tagging for organization
- Customizable themes
- Stats and achievements
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No subscriptions - Buy once, keep forever End your day with a moment of calm reflection. Solid Diary is more than just a journal app - it could be your sanctuary. Dive deep into your thoughts, and with the unique AI analysis, reveal deeper insights into yourself and the complex world around us. - 100% private diary What you write about in Solid Diary is for your eyes only. This diary is designed with privacy in mind and this is why your data is encrypted and only you can access it. You can also lock your diary with a biometric lock. - AI analysis Keeping a diary is a great way to explore your thoughts and better understand your emotions. But when you need an extra opinion, you can ask for an AI analysis and get a deeper understanding of the meaning behind your writing. - Unlimited uploads You can upload as many images, voice recordings and sketches as you need - Formatting and tags You can apply various formatting options to each entry and stay organized with tags. - Themes Solid Diary supports 4 different themes so you can pick the one that suits your style most. - Stats and achievements To make keeping a diary even more fun, there are achievements and stats that you unlock on your journey. Are you ready to start keeping your diary? Solid Diary is a universal app available on iOS, iPadOS, and macOS You can choose to unlock just this app or all 5 Solid Apps with one purchase Terms of service: http://solidapps.co/terms.html Privacy policy: http://solidapps.co/privacy.html
Clastly
Organize anything with custom collections and powerful field types. Track reading lists, travel memories, subscriptions, and more. Your data syncs securely via iCloud with a clean, native iOS interface.
- Customizable collections
- Multiple field types
- Pre-built templates
- Data filtering
- iCloud sync
- Ad-free experience
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Clastly is a personal database for collecting, organizing, and looking back on everything you love. Books, gadgets, travel memories, fandom, subscriptions—turn anything worth keeping into a collection shaped around you. Start quickly with templates: • Collection Catalog - Track purchase dates, condition, storage locations, and photos • Travel Log - Save places from maps or your current location • Fandom - Record concerts, merch, and favorite moments • Subscription Manager - Manage renewal dates, costs, and active services • Reading List - Organize covers, reading status, reviews, and reference URLs • Pet Diary - Capture daily moments, photos, and notes about your pets • Sauna & Spa - Record temperatures, facilities, and relaxation levels • Cafe Log - Log latte art, beans, and shop atmosphere • Movie Watchlist - Save memorable quotes, directors, and personal ratings Or start with Blank and create a structure of your own. Add fields that fit what you collect: • Text • Number • Date • Checkbox • Single Select • Multi Select • URL • Place • File • Created Time • Last Edited Time Look back your way: • List - Scan details quickly • Gallery - Browse records with photos • Masonry - Make the most of photos in different sizes • Board - Organize by status or category • Map - See saved places on a map Group, sort, and filter using your fields. Search within a collection and choose which details appear in each row. Capture from anywhere: Save photos, web pages, text, files, and Apple Maps places to Clastly from the share sheet. Home Screen widgets show recent records and collection counts, while widgets, the Lock Screen, and Control Center give you quick ways to add a new record. Clastly also works with Siri and Shortcuts. Automate opening collections, adding and editing records, updating fields, and searching your data. Private and synced: No ads. No social features. Your collections sync between iPhone and iPad with iCloud. Not for likes, but for yourself. Build a library to enjoy now and revisit later.
Screenshots
Verdict
The clearest difference is in-app purchases: Clastly at none against Solid Diary's 2. Clastly also leads on update cadence (fortnightly vs every 2 months) and review sentiment (100% vs 86%). Solid Diary's advantage is rating (5.0 vs 4.7) and ratings volume (26 vs 3). 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. Solid Diary sells 2 one-off in-app purchases. Clastly asks for nothing beyond the download.
Solid Diary holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Solid Diary has 26 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 86% of Solid Diary's written reviews are positive against 100% of Clastly's, so the app with the better star average is not the one people write more warmly about.
Solid Diary ships an update every 2 months, Clastly fortnightly. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.
| Parameter | Solid Diary | Clastly |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (26 ratings) — better | 4.7 (3 ratings) |
| Positive reviews | 86.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 26 — better | 3 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 44 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Solid Apps S.R.L. | Soji Takahashi |
Customer experience
Solid Diary
Clastly
In-app purchases
Solid Diary
- Unlock this app (lifetime)$4.99
- Unlock ALL 10 Solid Apps (lifetime)$9.99
Clastly
No in-app purchases









