Atona vs Lumen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atona
This AI-powered assistant streamlines your workflow by managing your inbox, drafting emails, organizing your calendar, and scheduling meetings. It handles follow-ups and note-taking, allowing you to focus on your priorities. Designed with privacy in mind, sensitive data is processed on-device.
- Inbox triage and email drafting
- Calendar organization and meeting scheduling
- Automated follow-ups
- Note-taking and meeting summaries
- On-device sensitive data processing
- Data export and deletion options
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Atona is a personal assistant that does more than answer questions — it takes work off your plate. It triages your inbox, drafts replies in your voice, keeps your calendar organized, schedules meetings, takes notes, and follows up so nothing slips through the cracks. Start your day ahead. Put email on autopilot. Never drop a follow-up. Schedule without the back-and-forth. Get help with meetings and calls. Work where you already work. Private by design: sensitive messages are detected on-device and never sent to AI. You can export or delete your data anytime. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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.
Screenshots
Verdict
The clearest difference is in-app purchases: Lumen at none against Atona's 3. Atona's advantage is ratings volume (13 vs 4) and iOS requirement (15.1 vs 18.0). On price, rating, review sentiment and update cadence 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. Atona sells 3 in-app purchases, starting at $11.99 per month. Lumen asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Atona against 5.0 for Lumen. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Atona ships an update weekly, Lumen every 2 weeks. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.
| Parameter | Atona | Lumen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (13 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 13 — better | 4 |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 57 MB | 28 MB |
| Age rating | 4+ | 17+ |
| Developer | Iroko Labs, Inc. | Daniel Kosukhin |
Customer experience
Atona
Lumen
In-app purchases
Atona
- Essentials$11.991 Month
- Standard$23.991 Month
- Pro$47.991 Month
Lumen
No in-app purchases









