# LM Mini vs 4DI

The clearest difference is in-app purchases: 4DI at none against LM Mini's 3. LM Mini's advantage is device support (4 vs 1) and iOS requirement (16.0 vs 18.6). On price, update cadence and ads there is nothing between them.

Both are free to download. LM Mini sells 3 in-app purchases, starting at $4.99 per month. 4DI asks for nothing beyond the download.

LM Mini ships an update every 3 days, 4DI every 5 days. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | LM Mini | 4DI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (150 ratings)](https://appshunter.io/ios/app/lm-mini/id6751125309/reviews)** | — |
| Number of ratings | **150** | — |
| Positive reviews | 65.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 171 MB | 5 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sultan Haider](https://appshunter.io/developer/1669774421) | [Robert Poetzsch](https://appshunter.io/developer/1860642630) |

## What reviewers say

### LM Mini

[App page](https://appshunter.io/ios/app/lm-mini/id6751125309)

Chat with your locally hosted language models directly from your iPhone. This companion app connects to your LM Studio server, offering features like conversation management, context visualization, and privacy-first data handling. It also supports image generation through Automatic1111 integration.

**Highlights:** Connect to LM Studio server, Chat with local language models, Manage multiple conversations, Track context usage, Dark mode support, Image generation integration

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $29.99 | per year |
| Lifetime Premium | $119.99 | one-time |


### 4DI

[App page](https://appshunter.io/ios/app/4di-data-integrity-tool/id6760180866)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LM Mini free?

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

### Is 4DI free?

4DI is free to download, with no in-app purchases.

### Do LM Mini or 4DI have ads?

Neither LM Mini nor 4DI shows ads.

### Which is updated more often, LM Mini or 4DI?

LM Mini ships an update every 3 days, and 4DI every 5 days. Most recently, LM Mini was updated on October 17, 2026 and 4DI on October 19, 2026.

---

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