# Zeronoon vs Atomic Chat

The clearest difference is in-app purchases: Atomic Chat at none against Zeronoon's 2. Zeronoon's advantage is iOS requirement (14.0.0 vs 16.2). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Zeronoon | Atomic Chat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.6 (12 ratings)](https://appshunter.io/ios/app/atomic-chat-private-local-ai/id6761720226/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | — | Free |
| Size | 58 MB | 84 MB |
| Requires iOS | **14.0.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [ZERONOON LIMITED](https://appshunter.io/developer/1775736649) | [Atomic Mail](https://appshunter.io/developer/1831027051) |

## What reviewers say

### Zeronoon

[App page](https://appshunter.io/ios/app/zeronoon/id6737965713)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zeronoon Pro Monthly | $4.99 | per month |
| ZeronoonPro Premium Yearly | $47.49 | per year |


### Atomic Chat

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

This AI assistant runs entirely on your device, offering complete privacy and offline functionality. It allows you to ask questions, brainstorm ideas, draft content, and more without needing an internet connection or an account.

**Highlights:** 100% on-device AI processing, Complete privacy, no cloud servers, Offline functionality, No account or sign-up required, Choose from curated language models, Optimized for Apple Silicon

**In-app purchases:** none


## Frequently asked questions

### Is Zeronoon free?

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

### Is Atomic Chat free?

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

### Do Zeronoon or Atomic Chat have ads?

Neither Zeronoon nor Atomic Chat shows ads.

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

Zeronoon ships an update fortnightly, and Atomic Chat fortnightly. Most recently, Zeronoon was updated on October 6, 2026 and Atomic Chat on October 24, 2026.

---

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