# Vessel Offset Measurement Tool vs SAR21

Vessel Offset Measurement Tool and SAR21 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Vessel Offset Measurement Tool | SAR21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sar21/id6747093593/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 8 days |
| Monetization | — | Free |
| Size | 5 MB | 26 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sarah Grasty](https://appshunter.io/developer/1721269945) | [Justin Calamia](https://appshunter.io/developer/1819822028) |

## What reviewers say

### Vessel Offset Measurement Tool

[App page](https://appshunter.io/ios/app/vessel-offset-measurement-tool/id6474274524)

**Features:** macOS Compatibility

**In-app purchases:** none


### SAR21

[App page](https://appshunter.io/ios/app/sar21/id6747093593)

This app streamlines emergency response coordination for Search and Rescue teams. It offers real-time callout notifications, team member status management, training scheduling, and secure communication. Essential for mission readiness and efficient incident command.

**Highlights:** Real-time callout notifications, Team member status management, Training session scheduling, Secure team communication, Equipment tracking, Incident command support

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

**In-app purchases:** none


## Frequently asked questions

### Is Vessel Offset Measurement Tool free?

Vessel Offset Measurement Tool is free to download, with no in-app purchases.

### Is SAR21 free?

SAR21 is free to download, with no in-app purchases.

### Do Vessel Offset Measurement Tool or SAR21 have ads?

Neither Vessel Offset Measurement Tool nor SAR21 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.*