# ChatFox vs Run Custom JS on Background

The clearest difference is update cadence: ChatFox at every 4 days against Run Custom JS on Background's every 4 months. ChatFox also leads on device support (4 vs 2) and iOS requirement (15.6 vs 17.6). On price, 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.

ChatFox ships an update every 4 days, Run Custom JS on Background every 4 months. The most recent releases landed on September 25, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | ChatFox | Run Custom JS on Background |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/chatfox/id6743636159/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | Free | — |
| Size | 27 MB | 1 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Digital Planet](https://appshunter.io/developer/1684662174) | [Takada Hiroki](https://appshunter.io/developer/1847165450) |

## What reviewers say

### ChatFox

[App page](https://appshunter.io/ios/app/chatfox/id6743636159)

This AI client app connects you to various intelligent services using your private API key. It supports Generative AI Standards protocols, offers syntax highlighting for code, and includes local Ollama support for a convenient user experience.

**Highlights:** Connect to multiple AI models, Use private API keys, Syntax highlighting for code, Local Ollama support, Generative AI Standards compliance

**In-app purchases:** none


### Run Custom JS on Background

[App page](https://appshunter.io/ios/app/run-custom-js-on-background/id6755627440)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChatFox free?

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

### Is Run Custom JS on Background free?

Run Custom JS on Background is free to download, with no in-app purchases.

### Do ChatFox or Run Custom JS on Background have ads?

Neither ChatFox nor Run Custom JS on Background shows ads.

### Which is updated more often, ChatFox or Run Custom JS on Background?

ChatFox ships an update every 4 days, and Run Custom JS on Background every 4 months. Most recently, ChatFox was updated on September 25, 2026 and Run Custom JS on Background on September 30, 2026.

---

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