# Bunker One vs Digital Bunker

The clearest difference is update cadence: Digital Bunker at every 2 weeks against Bunker One's every 3 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.

Bunker One ships an update every 3 months, Digital Bunker every 2 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Bunker One | Digital Bunker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/bunker-one/id439589227/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 16 MB | 43 MB |
| Requires iOS | **15.6** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Askapps](https://appshunter.io/developer/434706041) | [Vortex Development Group](https://appshunter.io/developer/1153965191) |

## What reviewers say

### Bunker One

[App page](https://appshunter.io/ios/app/bunker-one/id439589227)

This app provides a suite of calculators for marine fuel standards, including CCAI, Cetan Index, and blending calculations. It supports ISO 8217 and ASTM standards, with all inputs and outputs in SI units. Users can also access news and updates from the developer.

**Highlights:** ISO 8217 fuel standard lookup, CCAI Number calculation, Cetan Index calculation (old & new methods), Fuel blending calculators (viscosity, sulphur), Injection temperature calculation, Energy and price relation calculations, News updates from developer

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

**In-app purchases:** none


### Digital Bunker

[App page](https://appshunter.io/ios/app/digital-bunker/id1153965192)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bunker One free?

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

### Is Digital Bunker free?

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

### Do Bunker One or Digital Bunker have ads?

Neither Bunker One nor Digital Bunker shows ads.

### Which is updated more often, Bunker One or Digital Bunker?

Bunker One ships an update every 3 months, and Digital Bunker every 2 weeks. Most recently, Bunker One was updated on October 16, 2026 and Digital Bunker on October 5, 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.*