# OMS vs iMOS

The clearest difference is update cadence: iMOS at every 2 months against OMS's every 13 months. iMOS also leads on iOS requirement (8.0 vs 11.0). 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.

OMS ships an update every 13 months, iMOS every 2 months. The most recent releases landed on September 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | OMS | iMOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 months** |
| Size | 6 MB | 14 MB |
| Requires iOS | 11.0 | **8.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [E.N.A.I. Systems B.V.](https://appshunter.io/developer/511059631) | [TriOpSys B.V.](https://appshunter.io/developer/1418636591) |

## What reviewers say

### OMS

[App page](https://appshunter.io/ios/app/oms/id1272630026)

**Features:** macOS Compatibility

**In-app purchases:** none


### iMOS

[App page](https://appshunter.io/ios/app/imos/id1418636592)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OMS free?

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

### Is iMOS free?

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

### Do OMS or iMOS have ads?

Neither OMS nor iMOS shows ads.

### Which is updated more often, OMS or iMOS?

OMS ships an update every 13 months, and iMOS every 2 months. Most recently, OMS was updated on September 7, 2026 and iMOS on October 16, 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.*