# Baikal OMS vs VIOU

The clearest difference is update cadence: Baikal OMS at every 2 weeks against VIOU's every 2 months. 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.

Baikal OMS ships an update every 2 weeks, VIOU every 2 months. The most recent releases landed on September 13, 2026 and May 14, 2026 respectively.

## The numbers

| Metric | Baikal OMS | VIOU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 32 MB | 36 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [贝加尔物流集团 Baikal Express](https://appshunter.io/developer/1701306349) | [Guangzhou Weiou](https://appshunter.io/developer/1797473050) |

## What reviewers say

### Baikal OMS

[App page](https://appshunter.io/ios/app/baikal-oms/id6458542555)

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

**In-app purchases:** none


### VIOU

[App page](https://appshunter.io/ios/app/viou/id6742218202)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Baikal OMS free?

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

### Is VIOU free?

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

### Do Baikal OMS or VIOU have ads?

Neither Baikal OMS nor VIOU shows ads.

### Which is updated more often, Baikal OMS or VIOU?

Baikal OMS ships an update every 2 weeks, and VIOU every 2 months. Most recently, Baikal OMS was updated on September 13, 2026 and VIOU on May 14, 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.*