# Tanker vs ECA

The clearest difference is price: Tanker at Free against ECA's $2.99. ECA's advantage is in-app purchases (none vs 2) and iOS requirement (15.2 vs 27.0). On ads and device support there is nothing between them.

Tanker is free to download; ECA costs $2.99 up front. Tanker sells 2 one-off in-app purchases. ECA asks for nothing beyond the download.

## The numbers

| Metric | Tanker | ECA |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tanker-the-sounding-app/id1442173028/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 1 MB |
| Requires iOS | 27.0 | **15.2** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pearson Smith](https://appshunter.io/developer/1268483172) | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) |

## What reviewers say

### Tanker

[App page](https://appshunter.io/ios/app/tanker-the-sounding-app/id1442173028)

This app streamlines the process of calculating marine fuel tank volumes. It eliminates the need for physical sounding tables and manual calculations, providing instant volume lookups with trim corrections automatically applied. Users can manage target fill levels, track fuel transfers, and share tables with their fleet.

**Highlights:** Instant volume lookups, Target fill level setting, CSV import and tank duplication, Unit conversion and safe fill percentages, Bunkering mode for real-time tracking, Offline functionality, Cloud sharing via TankerBase

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $4.99 | one-time |
| Tanker Pro Lifetime | $59.99 | one-time |


### ECA

[App page](https://appshunter.io/ios/app/eca-sox/id6502656521)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tanker free?

Tanker is free to download, with in-app purchases available.

### Is ECA free?

ECA costs $2.99, with no in-app purchases.

### Do Tanker or ECA have ads?

Neither Tanker nor ECA shows ads.

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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.*