Comparison

KnowledgeBase Builder vs Lucid Mind

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

Head to head
About

KnowledgeBase Builder

Organize and search text documents and web pages with links within a mind map structure. Automatically create mind maps from text, import Wikipedia articles, and export your knowledge base as HTML. Also functions as a flowcharting tool.

Highlights
  • Save text documents and web pages
  • Full-text search
  • Organize with mind maps
  • Automatic mind map creation
  • Wikipedia import
  • Export to HTML
  • Flowcharting tool
Features
Read full description

The infinite mind map for iPhone & iPad: millions of connected ideas in a single file. Traditional mind mapping tools hit their limits at 50 to 100 nodes and force you into a rigid tree. InfoRapid KnowledgeBase Builder is a true knowledge network for personal knowledge management and your digital "second brain": any item can be linked to any other, every connection carries its own label, and your database grows to millions of entries without becoming cluttered. Just like in Google Earth, you always see exactly the area you are interested in – a tap smoothly centers any item. SPECTACULAR 3D VIEW Experience your knowledge in space: the interactive 3D view arranges your network as a sphere, an orrery or a planetarium. Fly from item to item with smooth camera moves, or let presentation mode take you on a guided tour – perfect for talks, teaching and videos. WHITEBOARD, MIND MAP AND KANBAN IN ONE APP Start freely on the whiteboard: ideas, notes and tasks float on an infinite canvas. As your thoughts take shape, arrange them as a mind map with one tap – or as a Kanban or Scrum board for projects and tasks. Drag a card into the next column with your finger or Apple Pencil and its status follows automatically. TIMELINE FOR DATES AND DEADLINES Give every item a start, end, due date, status, priority and owner. The timeline shows your whole project at a glance; drag a bar with a swipe to reschedule, tap it to open the item. EVERY DIAGRAM TYPE, AUTOMATICALLY ARRANGED Connect items by drag and drop using touch or Apple Pencil and label every relationship. A single tap arranges the whole network radially, symmetrically, hierarchically or as a table. Create mind maps, concept maps, flowcharts, org charts, family trees and even mathematical formulas (LaTeX). The app can also draw flowcharts straight from pseudocode. NOTES, RICH TEXT AND ATTACHMENTS Every item holds more than a title: formatted notes with tables, checklists and links to other items. Attach PDFs, Word and Excel files, images or web links directly – with automatic previews. FULL-TEXT SEARCH INSIDE YOUR DOCUMENTS The lightning-fast search finds not only item names but also the text in your notes and attached documents. OPTIMIZED FOR TOUCH & APPLE PENCIL Interact with your knowledge base naturally and fluidly: navigate with pinch-to-zoom, draw and connect thoughts directly with your finger or Apple Pencil. Whether on the go with your iPhone or on the expansive canvas of the iPad Pro, the interface adapts effortlessly to your device. WIKIPEDIA, WIKIDATA AND OBSIDIAN IMPORT Search Wikipedia or Wikidata right inside the app and turn entire articles, including their relationships, into a ready-made mind map. Text analysis automatically extracts the key terms from your own texts. Complete Obsidian vaults can be imported, too. CATEGORIES, TAGS AND FILTERS Group items by color and topic and hide entire branches with a single switch. ALSO INCLUDED • Learn with flashcards: the app turns your mind maps into flashcards and cloze tests for school, university and work. • Undo without worry: up to 200 steps are kept – even after a restart. • Open formats: import and export as JSON, XML, CSV, text document, image or 3D model. • Your data stays with you: every knowledge base is a fast SQLite file (.kdb) stored directly on your device. 100% offline, no account, no cloud lock-in, no tracking. • Seamless sync via iCloud Drive: share and edit the exact same .kdb file across iPhone, iPad, and your Mac or PC.

About

Lucid Mind

This app provides a peaceful digital space for organizing thoughts, storing ideas, and receiving insights from others. It offers a calming interface designed for night use, allowing users to express themselves freely and anonymously.

Highlights
  • Organize thoughts and ideas
  • Anonymous idea sharing
  • Receive insights from competent users
  • Peaceful night-time interface
  • Thought visualization as stars
  • Mind area for concept mapping
Features
Read full description

Thought is a simple, emotional and peaceful room made for night usage. It is the perfect place for a confused mind. Designed to keep everything you think; organized, easily accessible and pleasing to read. Everything about you is important for Thought and it will improve in every way to make you feel that way. You can let go of your burdens, or store precious ideas. You can share every idea you have, no one will know who shared it; and you will receive answers from the most competent people on the subject, it all works like magic. Receive answers on things you write, or relieves on things that burden you When you use your phone at night, maybe in your bed or outside, it's screen spoils the whole darkness. Night Thought, is all about making you feel like you are a part of the night. You can think and write whatever you want in this peaceful little sky. Or you can make a wish and watch a star sliding with it Night Thought is a relaxing and simple place where you don't get distracted. It's like writing your own thoughts into the sky. Talking with stars, and even watching your thoughts become stars. You will have shiny little stars with you, also everything you typed will wait you there as a star. Subscription Service: 1. Required to access the app's capabilities 2. Creating thoughts, stars, thought shows, mind area Payment models for Book Write Subscription • Night Thought Monthly Subscription: $2.99 per month, • Night Thought Yearly Subscription: $17.99 per year Terms of Use: https://hiappsco.wordpress.com/2022/01/05/night-thought-terms-of-use/ Privacy Policy: https://hiappsco.wordpress.com/2022/01/05/night-thought-privacy-policy/ • Payment will be charged to iTunes Account at confirmation of purchase. • Account will be charged for renewal within 24-hours prior to the end of the current subscription 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 to that publication.

Screenshots

KnowledgeBase Builder4 screens
Lucid Mind4 screens

Verdict

The call

The clearest difference is review sentiment: KnowledgeBase Builder at 91% against Lucid Mind's 0%. KnowledgeBase Builder also leads on rating (4.7 vs 3.0) and in-app purchases (none vs 2). Lucid Mind's advantage is price (Free vs $8.99). On ads, device support and iOS requirement 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

Lucid Mind is free to download; KnowledgeBase Builder costs $8.99 up front. Lucid Mind sells 2 in-app purchases, starting at $12.99 per month. KnowledgeBase Builder asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KnowledgeBase Builder holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: KnowledgeBase Builder has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 91% of KnowledgeBase Builder's written reviews are positive against 0% of Lucid Mind's.

UpkeepUpdate frequency

KnowledgeBase Builder ships an update every 2 weeks, Lucid Mind every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
KnowledgeBase Builder versus Lucid Mind: the parameters behind the verdict, then further details
ParameterKnowledgeBase BuilderLucid Mind
Price$8.99Free — better
Rating4.7 (24 ratings) — better3.0 (4 ratings)
Positive reviews90.9% of reviews — better0.0% of reviews
Number of ratings24 — better4
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size22 MB29 MB
Age rating4+4+
DeveloperIngo StraubKaan Yildiz

Customer experience

KnowledgeBase Builder

All ratings24 ratings
Positive95.8%
Neutral0.0%
Negative4.2%
Written reviews22 reviews
Positive90.9%
Neutral0.0%
Negative9.1%

Lucid Mind

All ratings4 ratings
Positive25.0%
Neutral50.0%
Negative25.0%
Written reviews3 reviews
Positive0.0%
Neutral66.7%
Negative33.3%

In-app purchases

None

KnowledgeBase Builder

No in-app purchases

2 purchases

Lucid Mind

Subscriptions2
  • Night Thought Monthly$12.991 Month
  • Night Thought Yearly3 Days trial$59.991 Year

Questions

Is KnowledgeBase Builder free?
KnowledgeBase Builder costs $8.99, with no in-app purchases.
Is Lucid Mind free?
Lucid Mind is free to download, with in-app purchases available.
Which has better reviews, KnowledgeBase Builder or Lucid Mind?
KnowledgeBase Builder is rated higher. KnowledgeBase Builder averages 4.7 out of 5 from 24 ratings, while Lucid Mind averages 3.0 from 4 ratings.
Do KnowledgeBase Builder or Lucid Mind have ads?
Neither KnowledgeBase Builder nor Lucid Mind shows ads.
Which is updated more often, KnowledgeBase Builder or Lucid Mind?
KnowledgeBase Builder ships an update every 2 weeks, and Lucid Mind every 2 months. Most recently, KnowledgeBase Builder was updated on November 2, 2026 and Lucid Mind on November 3, 2026.

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