# 發球 Serve vs SBALT

The clearest difference is iOS requirement: SBALT at 15.1 against 發球 Serve's 17.0. On price, update cadence, 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.

發球 Serve ships an update every 9 days, SBALT fortnightly. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 發球 Serve | SBALT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Size | 37 MB | 80 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [發球股份有限公司](https://appshunter.io/developer/1873056869) | [CHIHFAN Chen](https://appshunter.io/developer/1896306702) |

## What reviewers say

### 發球 Serve

[App page](https://appshunter.io/ios/app/serve/id6758462897)

**Features:** macOS Compatibility

**In-app purchases:** none


### SBALT

[App page](https://appshunter.io/ios/app/sbalt/id6766604212)

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

**In-app purchases:** none


## Frequently asked questions

### Is 發球 Serve free?

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

### Is SBALT free?

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

### Do 發球 Serve or SBALT have ads?

Neither 發球 Serve nor SBALT shows ads.

### Which is updated more often, 發球 Serve or SBALT?

發球 Serve ships an update every 9 days, and SBALT fortnightly. Most recently, 發球 Serve was updated on October 6, 2026 and SBALT on October 13, 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.*