# OptiUnit vs Marinekort

The clearest difference is update cadence: Marinekort at daily against OptiUnit's every 3 months. OptiUnit's advantage is iOS requirement (13.0 vs 15.0). 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.

OptiUnit ships an update every 3 months, Marinekort daily. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | OptiUnit | Marinekort |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Size | 61 MB | 7 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OptiUnit ApS](https://appshunter.io/developer/1529437877) | [Joacim Vetterlain](https://appshunter.io/developer/6812014415) |

## What reviewers say

### OptiUnit

[App page](https://appshunter.io/ios/app/optiunit/id1529437875)

**Features:** macOS Compatibility

**In-app purchases:** none


### Marinekort

[App page](https://appshunter.io/ios/app/marinekort/id6812014413)

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

**In-app purchases:** none


## Frequently asked questions

### Is OptiUnit free?

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

### Is Marinekort free?

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

### Do OptiUnit or Marinekort have ads?

Neither OptiUnit nor Marinekort shows ads.

### Which is updated more often, OptiUnit or Marinekort?

OptiUnit ships an update every 3 months, and Marinekort daily. Most recently, OptiUnit was updated on October 4, 2026 and Marinekort on October 15, 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.*