Lumen vs AI Note Taker & Recorder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- On-device AI knowledge base
- Plain English questioning
- Automatic content organization
- Private and offline browsing
- Tracker blocking
- Source citation for answers
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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.
AI Note Taker & Recorder
This app transforms audio recordings, files, and YouTube videos into concise, structured notes. It automatically transcribes speech, generates summaries, and extracts action items, saving you hours of manual work. Engage with your notes through AI chat and easily organize them in a library.
- Voice recording
- Audio file import
- YouTube video import
- Automatic transcription
- Short and detailed summaries
- Action item extraction
- AI chat for notes
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One hour of audio — one minute of reading Ai Notes turns voice recordings, audio files, and YouTube videos into structured notes. Skip hours of listening and manual note-taking — AI does the work for you. Record & import Voice recording in the app Upload audio files from your device Import YouTube videos via link AI processing Automatic speech transcription Short summary Detailed summary Key points as a list Action items extracted from speech Work with notes AI chat: ask questions about any note Play back original audio (recordings and uploads) Favorites and note library Search your notes Perfect for Lectures and study Meetings and calls Podcasts and interviews YouTube and online learning Personal voice ideas Privacy Policy: https://onetapp.net/privacy-cookie-policy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is monetization model: Lumen at free against AI Note Taker & Recorder's free with in-app purchases. Lumen also leads on ratings volume (4 vs 1). AI Note Taker & Recorder's advantage is iOS requirement (15.0 vs 18.0). On price, rating, update cadence 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Lumen against 5.0 for AI Note Taker & Recorder. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Lumen ships an update every 2 weeks, AI Note Taker & Recorder weekly. The most recent releases landed on June 28, 2026 and September 7, 2026 respectively.
| Parameter | Lumen | AI Note Taker & Recorder |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 8 MB |
| Age rating | 17+ | 4+ |
| Developer | Daniel Kosukhin | Onetapp Ltd |
Customer experience
Lumen
AI Note Taker & Recorder
In-app purchases
Lumen
No in-app purchases
AI Note Taker & Recorder
No in-app purchases





