Zettelkasten vs Axiom
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zettelkasten
This app creates a visual knowledge graph from your notes, allowing you to see and explore connections between ideas. It uses wiki-style linking and automatic backlinks to help you rediscover relationships and build a personal knowledge base without relying on traditional folders. Enjoy a private, ad-free experience where all your data stays on your device.
- Visual knowledge graph
- Automatic backlinks
- Wiki-style linking
- Interactive orbit graph
- Full-text search
- Markdown export
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Stop losing ideas in a pile of disconnected notes. NoteOrbit is a linked-notes app that turns everything you write into a living knowledge graph — every note becomes a node you can see, connect, and explore. Most note apps bury your thinking in folders. NoteOrbit does the opposite: type a note, drop a [[wiki-link]] to any other note, and the connection is built for you — both ways. Open any note and you instantly see what references it. Then step back and watch your ideas orbit as a glowing constellation you can pan, zoom, and tap to follow the thread. WHAT YOU GET - Write a note, add a [[wiki-link]], and NoteOrbit autocompletes titles and wires up the connection for you - Automatic backlinks so every note shows exactly what links to it — context folders can never give you - An interactive orbit graph that lays out your notes by how they actually connect - Instant tags with #hashtags to slice your notes any way you think - Hubs and orphans finder that surfaces your most-connected ideas and the notes hanging loose - Full-text search across every note, title, and link PERFECT FOR - Students and researchers building study and reference notes that reinforce each other - Writers and thinkers growing a personal knowledge base or second brain - Zettelkasten and PKM fans who want backlinks without a heavy desktop setup - Anyone journaling ideas and projects who wants to rediscover old connections WHY NOT JUST USE FOLDERS Folders force every note into one place and hide how your ideas relate. NoteOrbit lets a note live in as many contexts as it links to, then draws the map for you — so the connection you made months ago is one tap away, not lost three folders deep. PRIVACY Everything stays on your device. No account, no sign-in, no ads, no tracking. Your notes never leave your phone. FULL ACCESS NoteOrbit Premium unlocks the full experience: unlimited notes and connections, the complete interactive orbit graph, hubs, tags and the orphan finder, plus Markdown export to take your notes anywhere. Choose the plan that fits: - Weekly - Yearly - Lifetime (one-time purchase) Open NoteOrbit, write your first note, and link it — watch your thinking take shape. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com
Axiom
Organize thoughts, media, and archives into a unified cognitive workspace. This AI-powered tool transforms your inputs into structured, searchable insights and creates visual memory reels with AI narration. It offers secure, private data management with local biometric architecture and automated data purging.
- Instant knowledge ingestion (scan, voice, document, paste, AI generation)
- Cinematic memory reels with AI voice-over narration
- Interactive vault chat for data summarization and analysis
- Chronos timeline and knowledge graph visualization
- Local biometric security and data privacy
- Automated data purge option
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Synthesize your life, memories, and knowledge into a powerful digital mind. Welcome to Axiom—your secure, private "Second Brain." Axiom seamlessly organizes your daily thoughts, multi-format media, and private archives into a unified, interactive cognitive workspace. Powered by advanced Large Language Models, Axiom transforms your raw inputs into structured, searchable, and deeply meaningful insights. Whether you want to capture a brilliant business idea, transcribe an interview on the fly, or synthesize an entire week of personal study, Axiom makes it effortless. CORE FEATURES TO ELEVATE YOUR MIND Instant Knowledge Ingestion: Capture data the exact moment inspiration strikes using five lightning-fast pathways: Scan, Voice Note, Document Import (PDF, Text, Word), Paste Text, or AI Generation. Cinematic Memory Reels: Experience your data like never before. Axiom builds stunning visual slideshows out of your archives, layered with high-fidelity, synchronized AI voice-over narration. Download them straight to your camera roll with a single tap. Interactive Vault Chat: Have a direct conversation with your data repository. Instantly ask Axiom to "summarize my week," "draft an article from my meeting notes," or pinpoint deep connections. Chronos Timeline & Knowledge Graph: Step into a visual matrix of your thoughts. Navigate your memory streams using our automated upcoming calendar tracking layout or explore structural visual relationship maps. ENTERPRISE-GRADE PRIVACY & DATA SOVEREIGNTY Axiom is built from the ground up to protect your privacy and guarantee absolute personal sovereignty: Local Biometrics Architecture: Device-level entry gates (Face ID or Passcode fallback) are executed 100% locally on your physical device via Apple’s Secure Enclave. Your biometrics never touch a cloud server. Strict Third-Party AI Compliance: Your uploaded text, voice notes, and media are completely encrypted during internet transit and at rest. Your inputs are never sold to data brokers, never utilized for targeted ads, and are entirely isolated from public baseline AI model training arrays. Automated Purge Vault: Maintain the absolute right to be forgotten. A single tap permanently vaporizes your entire account node, authentication keys, and file archives from cloud servers instantly. Free Tier: Experience the baseline core ecosystem with up to 10 daily upload credits. Creation Engine: Upgrade to access advanced compute pool sizes and comprehensive narrative synthesis engines. Infinite Brain: The ultimate tier. Unlock full multimedia video pipelines, dynamic Text-to-Speech cinematic narrations, visual lookbooks, and native video downloads. Enterprise Nexus: Scaled corporate parameters and dedicated deployment options tailored for organizations. Stop losing tracking coordinates of your thoughts. Download Axiom today and unlock your Infinite SUBSCRIPTION TERMS, PRICE, & LEGAL INFO Axiom offers auto-renewing subscription options to unlock premium AI compute quotas and multimedia workflows: • Creation Engine Monthly: $19.99 per month • Creation Engine Annual: $16.66 per month (Billed annually at $199.99/year) • Infinite Brain Monthly: $49.99 per month • Infinite Brain Annual: $37.50 per month (Billed annually at $449.99/year) - Payment will be charged to your Apple Account at confirmation of purchase. - Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current billing period. - Your account will be charged for renewal within 24 hours prior to the end of the current period. - You can manage or turn off auto-renew in your Apple Account Settings at any time after purchase. LEGAL & COMPLIANCE LINKS: • Privacy Policy: https://gist.githubusercontent.com/mithil1610/0320c20c82ce4059e1cbd337b6cd3d14/raw/2c10d823b798595903bbeae49c4f5335af26cb3e/Privacy%2520Policy.txt • Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Axiom at 5.0 against Zettelkasten's 3.0. Axiom also leads on update cadence (weekly vs monthly) and iOS requirement (15.0 vs 17.0). On price, ratings volume, ads and in-app purchases 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. Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days and Axiom sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
Axiom holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Zettelkasten ships an update monthly, Axiom weekly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Zettelkasten | Axiom |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | Phuc Pham | Mithilkumar Shashikant Patel |
In-app purchases
Zettelkasten
- Weekly$9.997 Days
- Yearly3 Days trial$49.991 Year
Axiom
- Axiom Creation Engine Monthly$19.991 Month
- Axiom Infinite Brain Monthly$49.991 Month
- Axiom Creation Engine Annual$200.001 Year
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- Axiom Infinite Brain Annual$450.001 Year









