# e疆充 vs 优瓦时uWatts

The clearest difference is update cadence: 优瓦时uWatts at monthly against e疆充's every 7 months. e疆充's advantage is iOS requirement (12.0 vs 14.0). 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.

e疆充 ships an update every 7 months, 优瓦时uWatts monthly. The most recent releases landed on September 16, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | e疆充 | 优瓦时uWatts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Size | 185 MB | 47 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xinjiang Huataiyichuang New Energy Technology Co., Ltd.](https://appshunter.io/developer/1435040711) | [广州航宇时空科技有限公司](https://appshunter.io/developer/1567712703) |

## What reviewers say

### e疆充

[App page](https://appshunter.io/ios/app/e/id1435040712)

**Features:** Apple Wallet

**In-app purchases:** none


### 优瓦时uWatts

[App page](https://appshunter.io/ios/app/uwatts/id1567841229)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is e疆充 free?

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

### Is 优瓦时uWatts free?

优瓦时uWatts is free to download, with no in-app purchases.

### Do e疆充 or 优瓦时uWatts have ads?

Neither e疆充 nor 优瓦时uWatts shows ads.

### Which is updated more often, e疆充 or 优瓦时uWatts?

e疆充 ships an update every 7 months, and 优瓦时uWatts monthly. Most recently, e疆充 was updated on September 16, 2026 and 优瓦时uWatts on September 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.*