# E维护 vs 白噪音

The clearest difference is in-app purchases: E维护 at none against 白噪音's 1. 白噪音's advantage is update cadence (every 3 days vs monthly) and iOS requirement (10.0 vs 12.0). On price, ads and device support there is nothing between them.

Both are free to download. 白噪音 sells 1 one-off in-app purchase. E维护 asks for nothing beyond the download.

E维护 ships an update monthly, 白噪音 every 3 days. Both last shipped on October 27, 2026.

## The numbers

| Metric | E维护 | 白噪音 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Size | 62 MB | 17 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [鉴 刘](https://appshunter.io/developer/1420089432) | [颖昭 范](https://appshunter.io/developer/1476704080) |

## What reviewers say

### E维护

[App page](https://appshunter.io/ios/app/e/id1518396915)

**In-app purchases:** none


### 白噪音

[App page](https://appshunter.io/ios/app/id1660738083)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 购买VIP | $1.99 | one-time |


## Frequently asked questions

### Is E维护 free?

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

### Is 白噪音 free?

白噪音 is free to download, with in-app purchases available.

### Do E维护 or 白噪音 have ads?

Neither E维护 nor 白噪音 shows ads.

### Which is updated more often, E维护 or 白噪音?

E维护 ships an update monthly, and 白噪音 every 3 days. Most recently, E维护 was updated on October 27, 2026 and 白噪音 on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*