Comparison

ButterDocs vs MindCastle

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Idea development
  • Work structuring
  • Distraction-free writing
  • Frictionless collaboration
  • AI assistance option
Read full description

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.

About

MindCastle

Features
Read full description

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

ButterDocs4 screens
MindCastle4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MindCastle sells 4 in-app purchases, starting at $1.29 per month. ButterDocs asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
ButterDocs versus MindCastle: the parameters behind the verdict, then further details
ParameterButterDocsMindCastle
PriceFreeFree
Rating4.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS16.4 — better26.0
Further details — not scored
Size64 MB4 MB
Age rating4+4+
DeveloperArc Studio Labs, Inc.Code Maxima

In-app purchases

None

ButterDocs

No in-app purchases

4 purchases

MindCastle

Subscriptions2
  • Monthly Subscription$1.291 Month
  • Annual Subscription$10.991 Year
One-time2
  • Reset Password$0.99
  • Save Password$0.99

Questions

Is ButterDocs free?
ButterDocs is free to download, with no in-app purchases.
Is MindCastle free?
MindCastle is free to download, with in-app purchases available.
Do ButterDocs or MindCastle have ads?
Neither ButterDocs nor MindCastle shows ads.
Which is updated more often, ButterDocs or MindCastle?
ButterDocs ships an update every 3 months, and MindCastle every 3 weeks. Most recently, ButterDocs was updated on October 24, 2026 and MindCastle on October 5, 2026.

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