# Atomic Chat vs LLMster

The clearest difference is rating: LLMster at 5.0 against Atomic Chat's 4.1. LLMster also leads on review sentiment (100% vs 67%). Atomic Chat's advantage is ratings volume (19 vs 3) and iOS requirement (16.2 vs 26.0). On price, update cadence, 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.

LLMster holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Atomic Chat has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 67% of Atomic Chat's written reviews are positive against 100% of LLMster's.

Atomic Chat ships an update fortnightly, LLMster every 10 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Atomic Chat | LLMster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (19 ratings)](https://appshunter.io/ios/app/atomic-chat-private-local-ai/id6761720226/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/llmster/id6776621953/reviews)** |
| Number of ratings | **19** | 3 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | Free |
| Size | 90 MB | 10 MB |
| Requires iOS | **16.2** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Atomic Mail](https://appshunter.io/developer/1831027051) | [Dave Sebek](https://appshunter.io/developer/1436898695) |

## What reviewers say

### Atomic Chat

[App page](https://appshunter.io/ios/app/atomic-chat-private-local-ai/id6761720226)

This app offers an offline AI assistant on your iPhone and iPad. Download models to chat privately without an account. Customize assistants and track performance, with optional cloud integrations for enhanced features.

**Highlights:** Offline AI chat, Downloadable AI models, Custom assistant instructions, Switch AI models mid-conversation, Generation performance stats, Optional cloud provider integration, Web search capability

**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 Atomic Chat free?

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

### Is LLMster free?

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

### Which has better reviews, Atomic Chat or LLMster?

LLMster is rated higher. Atomic Chat averages 4.1 out of 5 from 19 ratings, while LLMster averages 5.0 from 3 ratings.

### Do Atomic Chat or LLMster have ads?

Neither Atomic Chat nor LLMster shows ads.

### Which is updated more often, Atomic Chat or LLMster?

Atomic Chat ships an update fortnightly, and LLMster every 10 days. Most recently, Atomic Chat was updated on November 9, 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.*