ButterDocs vs MindCastle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ButterDocs
This word processor helps you develop ideas, structure your work, and write without distraction. Collaborate seamlessly with others, with or without AI assistance, for ambitious writing projects.
- Idea development
- Work structuring
- Distraction-free writing
- Frictionless collaboration
- AI assistance option
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ButterDocs is the Google Docs Replacement for Ambitious Writing Are you writing with depth and consideration? ButterDocs is your word processor: Develop your ideas, structure your work, write without distraction and collaborate without friction—all in one harmonious app, with or without AI assistance.
MindCastle
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MindCastle Overview MindCastle is a location-based memory management app that lets you capture and store inspirations and memories tied to special places. Users create a MindCastle on the map and organize their memories through a 5-level hierarchy: Castle → Room → Cabinet → File → Mind. In Mind View — the final level — users can save a Title, Tags, Media (photos, videos, PDFs, Markdown files), Content, GPS Location, and Reminders. Key Features: * MindCastle Tab: Create Castles on the map and store memories through the 5-step structure. * Repository Tab: View the complete list of MindCastles and organize them into groups. * Search Tab: Find saved memories using keywords, dates, and view-level filters. * iCloud sync and Data Export/Import support. * 2D and 3D display modes. * Universal App: supports both iOS and macOS. /////////////////////////////////////////////////////////// Added Subscription Information. 'MindCastle' Max is available as a monthly or yearly subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the same price. You can manage subscriptions and turn off auto-renewal in your Account Settings after purchase. No refund will be provided for the unused portion of a subscription term. *End User License Agreement https://codemaxima.co.kr/z_eula/eula-mindcastle.html StoreView link : Licensed Application End User License Agreement *Privacy Policy https://codemaxima.co.kr/z_privacypolicy/privacypolicy-mindcastle.html StoreView link : Privacy Policy
Screenshots
Verdict
The clearest difference is in-app purchases: ButterDocs at none against MindCastle's 4. ButterDocs also leads on iOS requirement (16.4 vs 26.0). MindCastle's advantage is update cadence (every 3 weeks vs every 3 months). 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. MindCastle sells 4 in-app purchases, starting at $1.29 per month. ButterDocs asks for nothing beyond the download.
ButterDocs ships an update every 3 months, MindCastle every 3 weeks. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.
| Parameter | ButterDocs | MindCastle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 64 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Arc Studio Labs, Inc. | Code Maxima |
In-app purchases
ButterDocs
No in-app purchases
MindCastle
- Monthly Subscription$1.291 Month
- Annual Subscription$10.991 Year
- Reset Password$0.99
- Save Password$0.99









