# TW earthquake vs JBJS Audio

The clearest difference is update cadence: JBJS Audio at every 3 months against TW earthquake's every 21 months. JBJS Audio also leads on iOS requirement (13.0 vs 15.0). 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.

TW earthquake ships an update every 21 months, JBJS Audio every 3 months. The most recent releases landed on October 29, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | TW earthquake | JBJS Audio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 months** |
| Size | 7 MB | 30 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chi-Cheng Liao](https://appshunter.io/developer/1053803113) | [Modio Information Group](https://appshunter.io/developer/1378040255) |

## What reviewers say

### TW earthquake

[App page](https://appshunter.io/ios/app/tw-earthquake/id1281708762)

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

**In-app purchases:** none


### JBJS Audio

[App page](https://appshunter.io/ios/app/jbjs-audio/id1600271093)

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

**In-app purchases:** none


## Frequently asked questions

### Is TW earthquake free?

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

### Is JBJS Audio free?

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

### Do TW earthquake or JBJS Audio have ads?

Neither TW earthquake nor JBJS Audio shows ads.

### Which is updated more often, TW earthquake or JBJS Audio?

TW earthquake ships an update every 21 months, and JBJS Audio every 3 months. Most recently, TW earthquake was updated on October 29, 2026 and JBJS Audio on November 7, 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.*