# 预检验机 vs Batteries

The clearest difference is update cadence: 预检验机 at every 10 days against Batteries's every 5 months. 预检验机 also leads on iOS requirement (8.0 vs 12.0). 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.

预检验机 ships an update every 10 days, Batteries every 5 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | 预检验机 | Batteries |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 months |
| Size | 7 MB | 26 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hang Zhou XiangShang Electronic Commerce Co., LTD](https://appshunter.io/developer/938563429) | [深圳市集智电子有限公司](https://appshunter.io/developer/1655111205) |

## What reviewers say

### 预检验机

[App page](https://appshunter.io/ios/app/id1662737388)

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

**In-app purchases:** none


### Batteries

[App page](https://appshunter.io/ios/app/batteries/id6448932800)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 预检验机 free?

预检验机 is free to download, with no in-app purchases.

### Is Batteries free?

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

### Do 预检验机 or Batteries have ads?

Neither 预检验机 nor Batteries shows ads.

### Which is updated more often, 预检验机 or Batteries?

预检验机 ships an update every 10 days, and Batteries every 5 months. Most recently, 预检验机 was updated on November 3, 2026 and Batteries on November 3, 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.*