# ETA321 vs 巴士預報

The clearest difference is in-app purchases: ETA321 at none against 巴士預報's 1. 巴士預報's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 巴士預報 sells 1 in-app purchase, starting at $0.99 per month. ETA321 asks for nothing beyond the download.

ETA321 ships an update weekly, 巴士預報 every 10 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | ETA321 | 巴士預報 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Size | 10 MB | 29 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wing Leung Wong](https://appshunter.io/developer/6802715513) | [Ka Ho Wu](https://appshunter.io/developer/6818383309) |

## What reviewers say

### ETA321

[App page](https://appshunter.io/ios/app/eta321-every-second-counts/id6802721196)

**Features:** macOS Compatibility

**In-app purchases:** none


### 巴士預報

[App page](https://appshunter.io/ios/app/mbka/id6818383307)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MBKa Bus Supporter | $0.99 | per month |


## Frequently asked questions

### Is ETA321 free?

ETA321 is free to download, with no in-app purchases.

### Is 巴士預報 free?

巴士預報 is free to download, with in-app purchases available.

### Do ETA321 or 巴士預報 have ads?

Neither ETA321 nor 巴士預報 shows ads.

### Which is updated more often, ETA321 or 巴士預報?

ETA321 ships an update weekly, and 巴士預報 every 10 days. Most recently, ETA321 was updated on October 25, 2026 and 巴士預報 on October 26, 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.*