# Pocket Brain vs LumenDoc

The clearest difference is in-app purchases: Pocket Brain at none against LumenDoc's 2. Pocket Brain also leads on update cadence (every 8 days vs every 3 months) and iOS requirement (14.0 vs 17.0). LumenDoc's advantage is ads (none vs shown). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. LumenDoc sells 2 in-app purchases, starting at $4.99 per month. Pocket Brain asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Pocket Brain against 5.0 for LumenDoc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Pocket Brain ships an update every 8 days, LumenDoc every 3 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Pocket Brain | LumenDoc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/pocket-brain-ai-second-brain/id6738719152/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/lumendoc-ai-document-chat/id6757917138/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | **Ad-supported** | Freemium |
| Size | 44 MB | 7 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MIGUEL ALVAREZ LESMES](https://appshunter.io/developer/1782050151) | [David Mendez](https://appshunter.io/developer/1869594292) |

## What reviewers say

### Pocket Brain

[App page](https://appshunter.io/ios/app/pocket-brain-ai-second-brain/id6738719152)

Capture and organize your thoughts effortlessly with an AI-powered second brain. Speak or type ideas, reminders, and to-do lists, and let smart AI automatically sort them. Easily retrieve information by asking natural language questions.

**Highlights:** Capture ideas by voice or text, AI-organized knowledge base, Chat with your notes, Natural language search, Centralized storage for all thoughts, Private and secure data

**Features:** macOS Compatibility

**In-app purchases:** none


### LumenDoc

[App page](https://appshunter.io/ios/app/lumendoc-ai-document-chat/id6757917138)

Transform your paperwork into a searchable digital library. Scan documents, extract key information with AI, and ask questions to find details instantly. Set reminders for important dates and track spending without linking bank accounts.

**Highlights:** Scan documents with AI Vision, Ask questions about your documents, Track spending from receipts, Set reminders and calendar events, Private iCloud backup (Pro), On-device OCR fallback

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LumenDoc Pro | $4.99 | per month |
| LumenDoc Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Pocket Brain free?

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

### Is LumenDoc free?

LumenDoc is free to download, with in-app purchases available.

### Which has better reviews, Pocket Brain or LumenDoc?

Pocket Brain and LumenDoc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Pocket Brain or LumenDoc have ads?

Pocket Brain shows ads; LumenDoc does not.

### Which is updated more often, Pocket Brain or LumenDoc?

Pocket Brain ships an update every 8 days, and LumenDoc every 3 months. Most recently, Pocket Brain was updated on October 30, 2026 and LumenDoc on November 5, 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.*