Comparison

Notes Expert vs Lumen

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

Head to head
About

Notes Expert

Capture, organize, and enhance your ideas with AI-powered note-taking. Record voice memos, get smart summaries, and improve text clarity. Securely sync across devices with end-to-end encryption.

Highlights
  • AI-powered summarization and enhancement
  • Voice recording and offline transcription
  • Rich text editing with formatting options
  • Folder and tag-based organization
  • End-to-end encrypted iCloud sync
  • Action item extraction
Features
Read full description

Notes Expert transforms how you capture and organize ideas. Record your thoughts, let AI enhance your notes, and keep everything synced securely across all your devices. VOICE RECORDING & TRANSCRIPTION • Record voice memos directly in your notes • On-device recordings -> text keeps your data private • Works offline — no internet required • Attach multiple recordings to any note AI-POWERED FEATURES • Smart Summarization — get concise summaries instantly • Note Enhancement — improve structure and clarity • Text Enhancement — fix grammar and polish selected text • Action item extraction — never miss a to-do RICH TEXT EDITING • Bold, italic, underline, and strikethrough • Multiple heading levels and text colors • Bullet points, numbered lists, and checklists • Add images and attachments to any note SMART ORGANIZATION • Create folders and smart folders with custom rules • Tag notes for easy filtering • Pin important notes to the top • Powerful search across all your content PRIVACY FIRST • End-to-end encrypted iCloud sync • On-device transcription — your voice stays on your device • No tracking or personal data collection • Your notes are yours alone SEAMLESS SYNC • Automatic iCloud backup and sync • Access your notes on all Apple devices • Works offline with automatic sync when reconnected Questions or feedback? We'd love to hear from you. Subscriptions will automatically renew and abide by Apple Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Lumen

This app acts as a browser that remembers what you read, building a personal knowledge base from engaged pages. It allows you to ask questions in plain English about your reading history, with answers generated by an on-device AI. All your data remains private and offline.

Highlights
  • On-device AI knowledge base
  • Plain English questioning
  • Automatic content organization
  • Private and offline browsing
  • Tracker blocking
  • Source citation for answers
Read full description

Lumen is a browser with a memory. Most browsers forget the second you close a tab. Lumen does not. As you read, it quietly builds a personal knowledge base from the pages you actually engage with, and then lets you ask questions about any of it in plain English, answered by an AI model that runs entirely on your device. Nothing you read, nothing you ask, and nothing Lumen learns about you ever leaves your phone. WHAT IT DOES Lumen reads along with you. It distinguishes between pages you genuinely read and pages you opened and swiped away, and it extracts the meaningful content from the ones that stuck. That content gets summarized, embedded, and organized into a searchable knowledge base, all on-device. Later, when you want to find something, you do not have to dig through history or remember which tab it was in. You just ask: "What did I read about sourdough starters last week?" "Summarize that article about the new M-series chips." "What were the main arguments in that piece I read on Tuesday?" Every answer cites the pages it came from, so you can jump straight back to the source. AUTO-ORGANIZED Your reading sorts itself into a clean hierarchy: Topics, Websites, and Pages. Each level carries its own AI-generated summary, so you can scan what you have been learning at a glance. No tagging, no folders to maintain. Lumen handles it in the background. PRIVATE BY DEFAULT Lumen has no server. There is quite literally nothing to send. On-device LLM: a quantized Llama 3.2 model runs locally through Apple's MLX framework. Local SQLite storage: your reading history, summaries, and embeddings never leave the device. Built-in privacy: tracker blocking, third-party cookie blocking, and fingerprint resistance. Secure: HTTPS-only by default, with mixed-content blocking. No strings attached: no accounts, no sync, no telemetry, no ads. The AI weights download once on first launch (~700 MB). After that, everything works fully offline: browsing, reading, asking, answering. BUILT FOR iOS Lumen is written from scratch in Swift and SwiftUI, designed specifically for iPhone and iPad. It uses Apple's own frameworks wherever it can: NLEmbedding for semantic search, WKWebView for browsing, SQLite with FTS5 for full-text queries, and MLX Swift for on-device inference. Zero third-party trackers. Zero external services. WHO IT'S FOR While most browsers treat the web as a feed to scroll past, Lumen treats it as a library worth keeping. If you read a lot online and constantly think "I know I saw something about this recently but I cannot find it again," Lumen is for you. Researchers, students, writers, developers, and lifelong learners. You do not need to change how you browse. Browse normally, and Lumen takes care of the rest. REQUIREMENTS iOS 18 or later. iPhone with Apple Silicon recommended for the fastest on-device AI performance.

Screenshots

Notes Expert4 screens
Lumen4 screens

Verdict

The call

The clearest difference is in-app purchases: Lumen at none against Notes Expert's 2. Lumen also leads on iOS requirement (18.0 vs 26.1). Notes Expert's advantage is update cadence (every 3 days vs every 2 weeks). On price, rating, ratings volume and ads 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. Notes Expert sells 2 in-app purchases, starting at $2.99 per 7 days. Lumen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Notes Expert against 5.0 for Lumen. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

UpkeepUpdate frequency

Notes Expert ships an update every 3 days, Lumen every 2 weeks. The most recent releases landed on September 16, 2026 and September 28, 2026 respectively.

Scorecard4 real differences · 6 level
Notes Expert versus Lumen: the parameters behind the verdict, then further details
ParameterNotes ExpertLumen
PriceFreeFree
Rating5.0 (2 ratings)5.0 (4 ratings)
Positive reviews—100.0% of reviews
Number of ratings24 — better
Update frequencyEvery 3 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS26.118.0 — better
Further details — not scored
Size28 MB28 MB
Age rating4+17+
DeveloperVia Excelsior LLCDaniel Kosukhin

Customer experience

Notes Expert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Lumen

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Notes Expert

Subscriptions2
  • Weekly Base Plan$2.997 Days
  • Monthly Base Plan$9.991 Month
None

Lumen

No in-app purchases

Questions

Is Notes Expert free?
Notes Expert is free to download, with in-app purchases available.
Is Lumen free?
Lumen is free to download, with no in-app purchases.
Which has better reviews, Notes Expert or Lumen?
Notes Expert and Lumen are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.
Do Notes Expert or Lumen have ads?
Neither Notes Expert nor Lumen shows ads.
Which is updated more often, Notes Expert or Lumen?
Notes Expert ships an update every 3 days, and Lumen every 2 weeks. Most recently, Notes Expert was updated on September 16, 2026 and Lumen on September 28, 2026.

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