Comparison

MemoryAI vs Zettelkasten

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

Head to head
About

MemoryAI

Features
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MemoryAI β€” Your Private AI Assistant, 100% Offline Complete Privacy Run powerful AI models directly on your phone. No cloud, no servers, no data collection, no login required. Your conversations never leave your device. AI Features β€’ Chat with AI β€” multi-turn conversations with full context memory β€’ Continuous Voice Mode β€” fully hands-free: speak naturally, and the AI listens, responds, and speaks back without tapping β€’ Voice Input β€” speak instead of typing with on-device transcription β€’ Text-to-Speech β€” listen to AI responses read aloud, or enable auto-speak for hands-free use β€’ Document Analysis (RAG) β€” import PDFs, TXT, MD files and ask questions about them β€’ Image Understanding β€” analyze photos with Vision AI models; select multiple images at once β€’ Chat Templates β€” 16 pre-built AI personas (code helper, writing coach, tutor, and more) β€’ Benchmarking β€” measure model speed (tokens/sec) directly on your device β€’ Context Window Display β€” see current vs. max token usage, so you never exceed the model’s limit Power User Features β€’ Import custom GGUF models β€” bring any compatible model from HuggingFace β€’ Dual engine β€” Gemma (MediaPipe) + LLAMA_CPP; choose the backend that fits your needs β€’ HuggingFace Token Management β€” save and manage your token for seamless gated model downloads β€’ Model parameters β€” adjust temperature, top-k, top-p, max tokens per model β€’ Pause & Resume Downloads β€” control large model downloads to save data or battery β€’ Backup & Restore β€” save your chats and settings to Google Drive / iCloud Kid / Safe Mode β€’ PIN-protected parental controls β€’ Content filter blocks inappropriate topics before they reach the AI β€’ Model Safety Checks β€” automatic warnings to prevent unverified imported models from running in Kid Mode β€’ Locks the active model β€” child cannot switch or change settings β€’ Age-appropriate AI responses enforced via safety prompt β€’ Parental Unlock β€” temporarily access settings and documents from the chat screen without disabling Kid Mode Works Everywhere β€’ iOS β€’ Runs 100% offline after downloading a model (1–4 GB) β€’ 10+ AI models: Gemma, Llama, Phi, Qwen, DeepSeek, and more β€’ Works on devices with 4 GB+ RAM β€’ Available in 6 languages: English, Italian, German, French, Spanish, Portuguese Completely Free β€’ Unlimited chat, voice, vision, documents, image OCR β€’ All file types supported β€’ No ads, no subscriptions, no in-app purchases β€’ No accounts, no tracking Built by Facchinits β€” privacy-first AI for everyone.

About

Zettelkasten

Features
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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 β€” 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 β€” 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 β€” 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 β€” 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 β€” 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

Screenshots

MemoryAI4 screens
Zettelkasten4 screens

Verdict

The call

The clearest difference is in-app purchases: MemoryAI at none against Zettelkasten's 2. MemoryAI also leads on update cadence (every 3 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days. MemoryAI asks for nothing beyond the download.

UpkeepUpdate frequency

MemoryAI ships an update every 3 days, Zettelkasten monthly. The most recent releases landed on September 1, 2026 and September 8, 2026 respectively.

Scorecard2 real differences Β· 4 level
MemoryAI versus Zettelkasten: the parameters behind the verdict, then further details
ParameterMemoryAIZettelkasten
PriceFreeFree
Update frequencyEvery 3 days β€” betterMonthly
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhoneiPhone
Requires iOS16.4 β€” better17.0
Further details β€” not scored
Size182 MB6 MB
Age rating12+4+
DeveloperAlessandro FacchiniPhuc Pham

In-app purchases

None

MemoryAI

No in-app purchases

2 purchases

Zettelkasten

Subscriptions2
  • Weekly$9.997 Days
  • Yearly3 Days trial$49.991 Year

Questions

Is MemoryAI free?
MemoryAI is free to download, with no in-app purchases.
Is Zettelkasten free?
Zettelkasten is free to download, with in-app purchases available.
Do MemoryAI or Zettelkasten have ads?
Neither MemoryAI nor Zettelkasten shows ads.
Which is updated more often, MemoryAI or Zettelkasten?
MemoryAI ships an update every 3 days, and Zettelkasten monthly. Most recently, MemoryAI was updated on September 1, 2026 and Zettelkasten on September 8, 2026.

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