# OilMo vs D

The clearest difference is update cadence: OilMo at every 3 weeks against D'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.

OilMo ships an update every 3 weeks, D every 2 months. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | OilMo | D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 13 MB | 15 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Wikon Kommunikationstechnik GmbH](https://appshunter.io/developer/472943917) | [Winkong Marine Engineering Co.,Ltd.](https://appshunter.io/developer/1602619555) |

## What reviewers say

### OilMo

[App page](https://appshunter.io/ios/app/oilmo/id1032261344)

**Features:** macOS Compatibility

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-vesselkeeper/id6677012335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OilMo free?

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

### Is D free?

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

### Do OilMo or D have ads?

Neither OilMo nor D shows ads.

### Which is updated more often, OilMo or D?

OilMo ships an update every 3 weeks, and D every 2 months. Most recently, OilMo was updated on September 10, 2026 and D on September 18, 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.*