Comparison

KnowledgeBase Builder vs AFI Xpense 2

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

AFI Xpense 2

Features
Read full description

Travel costs and expenses can now be recorded digitally via a mobile app and/or web applicationand invoiced directly from SAP: with AFI Xpense the days of Excel charts, forms and media disruptions are over. The software makes your business trip so much easier because you can conveniently and digitally record taxi bills, train tickets, hotel and restaurant receipts or expenses of any kind via the camera in the AFI Xpense app. Correct processing is initiated at the same time. Expense rates and special expenses can easily be integrated – the accounting effort is reduced to a minimum. Queries and approvals are quickly dealt with digitally. Traceability is ensured by accurate documentation. Modern and safe working on the go: you keep control of your expense management and benefit from transparency, high data quality and the central consolidation of accounting data. The logical consequence: an increase in employee satisfaction.

Screenshots

KnowledgeBase Builder4 screens
AFI Xpense 24 screens

Verdict

The call

The clearest difference is price: AFI Xpense 2 at Free against KnowledgeBase Builder's $8.99. KnowledgeBase Builder's advantage is update cadence (every 2 weeks vs every 3 months) and device support (3 vs 1). On ads, in-app purchases 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

AFI Xpense 2 is free to download; KnowledgeBase Builder costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

KnowledgeBase Builder ships an update every 2 weeks, AFI Xpense 2 every 3 months. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 7 level
KnowledgeBase Builder versus AFI Xpense 2: the parameters behind the verdict, then further details
ParameterKnowledgeBase BuilderAFI Xpense 2
Price$8.99Free — better
Rating4.7 (24 ratings) — better—
Positive reviews90.9% of reviews—
Number of ratings24 — better—
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.6
Further details — not scored
Size22 MB123 MB
Age rating4+4+
DeveloperIngo StraubAFI Solutions GmbH

In-app purchases

None

KnowledgeBase Builder

No in-app purchases

None

AFI Xpense 2

No in-app purchases

Questions

Is KnowledgeBase Builder free?
KnowledgeBase Builder costs $8.99, with no in-app purchases.
Is AFI Xpense 2 free?
AFI Xpense 2 is free to download, with no in-app purchases.
Do KnowledgeBase Builder or AFI Xpense 2 have ads?
Neither KnowledgeBase Builder nor AFI Xpense 2 shows ads.
Which is updated more often, KnowledgeBase Builder or AFI Xpense 2?
KnowledgeBase Builder ships an update every 2 weeks, and AFI Xpense 2 every 3 months. Most recently, KnowledgeBase Builder was updated on October 29, 2026 and AFI Xpense 2 on October 17, 2026.

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