# ENGINE SFC vs Boat Calculator

The clearest difference is in-app purchases: ENGINE SFC at none against Boat Calculator's 1. ENGINE SFC also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.2 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Boat Calculator sells 1 one-off in-app purchase. ENGINE SFC asks for nothing beyond the download.

ENGINE SFC ships an update daily, Boat Calculator every 3 weeks. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ENGINE SFC | Boat Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 6 MB | 3 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oleksii Nezhalskyi](https://appshunter.io/developer/1687730603) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### ENGINE SFC

[App page](https://appshunter.io/ios/app/engine-sfc/id6469806252)

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

**In-app purchases:** none


### Boat Calculator

[App page](https://appshunter.io/ios/app/boat-calculator-marine-engine/id6762048442)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Calculators | $12.99 | one-time |


## Frequently asked questions

### Is ENGINE SFC free?

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

### Is Boat Calculator free?

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

### Do ENGINE SFC or Boat Calculator have ads?

Neither ENGINE SFC nor Boat Calculator shows ads.

### Which is updated more often, ENGINE SFC or Boat Calculator?

ENGINE SFC ships an update daily, and Boat Calculator every 3 weeks. Most recently, ENGINE SFC was updated on October 19, 2026 and Boat Calculator on October 20, 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.*