# Mass vs Marine Docker

The clearest difference is update cadence: Mass at every 3 weeks against Marine Docker's every 4 months. Mass also leads on iOS requirement (8.0 vs 13.4). 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.

Mass ships an update every 3 weeks, Marine Docker every 4 months. The most recent releases landed on October 23, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Mass | Marine Docker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/mass-finder/id802275884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | — |
| Size | 7 MB | 61 MB |
| Requires iOS | **8.0** | 13.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solaz Dazen srl](https://appshunter.io/developer/802275887) | [Kontis d.o.o.](https://appshunter.io/developer/1745258669) |

## What reviewers say

### Mass

[App page](https://appshunter.io/ios/app/mass-finder/id802275884)

This utility app calculates the mass of metal and plastic preforms directly on the field. It supports various preform and material types, offering metric and imperial measurement modes for convenience.

**Highlights:** 13 preform types, 9 material types with alloys, Graphical preform representation, Metric and imperial modes, Help section, Easy to use

**Features:** macOS Compatibility

**In-app purchases:** none


### Marine Docker

[App page](https://appshunter.io/ios/app/marine-docker/id6502378616)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mass free?

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

### Is Marine Docker free?

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

### Do Mass or Marine Docker have ads?

Neither Mass nor Marine Docker shows ads.

### Which is updated more often, Mass or Marine Docker?

Mass ships an update every 3 weeks, and Marine Docker every 4 months. Most recently, Mass was updated on October 23, 2026 and Marine Docker on October 27, 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.*