# Sound Union vs LLMster

The clearest difference is update cadence: LLMster at every 10 days against Sound Union's every 14 months. Sound Union's advantage is iOS requirement (13.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Sound Union ships an update every 14 months, LLMster every 10 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sound Union | LLMster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/llmster/id6776621953/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 160 MB | 10 MB |
| Requires iOS | **13.4** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sound Union, Inc.](https://appshunter.io/developer/1709497253) | [Dave Sebek](https://appshunter.io/developer/1436898695) |

## What reviewers say

### Sound Union

[App page](https://appshunter.io/ios/app/sound-union/id6468079951)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### LLMster

[App page](https://appshunter.io/ios/app/llmster/id6776621953)

Connect to local AI models running on your server for private, fast conversations. Stream replies, reasoning, and image-based interactions. Organize, back up, and restore your chat library securely.

**Highlights:** Connects to local LM Studio servers, Private by design, no cloud relay, Organize chats by model, folder, or pin, Backup and restore chat library, Supports vision models with image input, Hands-free voice chat with on-device speech recognition, Customizable system prompts and tool integrations per chat

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

**In-app purchases:** none


## Frequently asked questions

### Is Sound Union free?

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

### Is LLMster free?

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

### Do Sound Union or LLMster have ads?

Neither Sound Union nor LLMster shows ads.

### Which is updated more often, Sound Union or LLMster?

Sound Union ships an update every 14 months, and LLMster every 10 days. Most recently, Sound Union was updated on October 30, 2026 and LLMster on October 31, 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.*