# Lumen vs ADHD Notes

The clearest difference is rating: Lumen at 5.0 against ADHD Notes's 4.2. Lumen also leads on review sentiment (100% vs 67%). ADHD Notes's advantage is update cadence (every 4 days vs every 2 weeks) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lumen holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 100% of Lumen's written reviews are positive against 67% of ADHD Notes's.

Lumen ships an update every 2 weeks, ADHD Notes every 4 days. The most recent releases landed on June 28, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Lumen | ADHD Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/lumen-knowledge-browser/id6762682475/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/adhd-notes-ai-brain-dump/id6777769493/reviews) |
| Number of ratings | 4 | **5** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free | Free |
| Size | 28 MB | 25 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Daniel Kosukhin](https://appshunter.io/developer/1852657475) | [Calvin Churchill](https://appshunter.io/developer/6777769495) |

## What reviewers say

### Lumen

[App page](https://appshunter.io/ios/app/lumen-knowledge-browser/id6762682475)

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

**In-app purchases:** none


### ADHD Notes

[App page](https://appshunter.io/ios/app/adhd-notes-ai-brain-dump/id6777769493)

This app helps manage tasks and reminders for individuals with ADHD. It offers a simple, flat interface to capture thoughts and provides focus tools, gentle reminders, and a daily summary to reduce mental clutter.

**Highlights:** Capture thoughts from anywhere, Focus mode with quiet timer, Recurring nudges and daily briefs, Full context on every task, Home and Lock Screen widgets, Low-stimulation mode

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Lumen free?

Lumen is free to download, with no in-app purchases.

### Is ADHD Notes free?

ADHD Notes is free to download, with no in-app purchases.

### Which has better reviews, Lumen or ADHD Notes?

Lumen is rated higher. Lumen averages 5.0 out of 5 from 4 ratings, while ADHD Notes averages 4.2 from 5 ratings.

### Do Lumen or ADHD Notes have ads?

Neither Lumen nor ADHD Notes shows ads.

### Which is updated more often, Lumen or ADHD Notes?

Lumen ships an update every 2 weeks, and ADHD Notes every 4 days. Most recently, Lumen was updated on June 28, 2026 and ADHD Notes on September 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*