# Dualog Admin vs Sea/calc distance

The clearest difference is update cadence: Sea/calc distance at every 2 months against Dualog Admin's every 4 months. Dualog Admin's advantage is iOS requirement (9.0 vs 18.6). 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.

Dualog Admin ships an update every 4 months, Sea/calc distance every 2 months. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Dualog Admin | Sea/calc distance |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 122 MB | 31 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dualog AS](https://appshunter.io/developer/1139734651) | [Maritech Services Limited](https://appshunter.io/developer/1084735243) |

## What reviewers say

### Dualog Admin

[App page](https://appshunter.io/ios/app/dualog-admin/id1322916600)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sea/calc distance

[App page](https://appshunter.io/ios/app/seacalc-distance/id1502845291)

Calculate voyage distances, times, and costs between waypoints on a map. View arrival/departure times, bunker prices, and vessel routes on a timeline. Exclude waypoints for alternative routing.

**Highlights:** Plot routes on a map, Calculate SECA distances, Estimate voyage time, View arrival/departure times, Access daily bunker prices, Display vessel route timeline

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dualog Admin free?

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

### Is Sea/calc distance free?

Sea/calc distance is free to download, with no in-app purchases.

### Do Dualog Admin or Sea/calc distance have ads?

Neither Dualog Admin nor Sea/calc distance shows ads.

### Which is updated more often, Dualog Admin or Sea/calc distance?

Dualog Admin ships an update every 4 months, and Sea/calc distance every 2 months. Most recently, Dualog Admin was updated on September 14, 2026 and Sea/calc distance on September 19, 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.*