# Run Custom JS on Background vs Hyphoon

The clearest difference is update cadence: Hyphoon at every 9 days against Run Custom JS on Background's every 4 months. Hyphoon also leads on iOS requirement (15.0 vs 17.6). 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.

Run Custom JS on Background ships an update every 4 months, Hyphoon every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Run Custom JS on Background | Hyphoon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hyphoon/id6802908743/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 1 MB | 73 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Takada Hiroki](https://appshunter.io/developer/1847165450) | [向胜 李](https://appshunter.io/developer/6801881758) |

## What reviewers say

### 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


### Hyphoon

[App page](https://appshunter.io/ios/app/hyphoon/id6802908743)

Monitor tire pressure and temperature for your vehicle using compatible Bluetooth sensors. Get real-time data, set custom alerts, and view trends. Designed with privacy in mind, it stores all data locally and has no ads or analytics.

**Highlights:** Monitor BLE TPMS sensor broadcasts, View pressure and temperature per wheel, Configure vehicle pressure/temperature limits, Receive local notifications and voice alerts, Review recent readings and tire trends, Home Screen widgets for at-a-glance status, View driving information via CarPlay

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

**In-app purchases:** none


## Frequently asked questions

### Is Run Custom JS on Background free?

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

### Is Hyphoon free?

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

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

Neither Run Custom JS on Background nor Hyphoon shows ads.

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

Run Custom JS on Background ships an update every 4 months, and Hyphoon every 9 days. Most recently, Run Custom JS on Background was updated on October 25, 2026 and Hyphoon on October 24, 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.*