# AI Text Expander vs Lumen

The clearest difference is in-app purchases: Lumen at none against AI Text Expander's 2. Lumen also leads on update cadence (every 2 weeks vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. AI Text Expander sells 2 in-app purchases, starting at $4.99 per month. Lumen asks for nothing beyond the download.

AI Text Expander ships an update monthly, Lumen every 2 weeks. The most recent releases landed on October 1, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | AI Text Expander | Lumen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/lumen-knowledge-browser/id6762682475/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 74 MB | 28 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Oleksandr Momotiuk](https://appshunter.io/developer/1398478484) | [Daniel Kosukhin](https://appshunter.io/developer/1852657475) |

## What reviewers say

### AI Text Expander

[App page](https://appshunter.io/ios/app/ai-text-expander-smarttype/id6761342128)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Access | $4.99 | per month |
| Yearly Pro Access | $29.99 | per year |


### 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


## Frequently asked questions

### Is AI Text Expander free?

AI Text Expander is free to download, with in-app purchases available.

### Is Lumen free?

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

### Do AI Text Expander or Lumen have ads?

Neither AI Text Expander nor Lumen shows ads.

### Which is updated more often, AI Text Expander or Lumen?

AI Text Expander ships an update monthly, and Lumen every 2 weeks. Most recently, AI Text Expander was updated on October 1, 2026 and Lumen on September 28, 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.*