# DRFT MRKS vs SeaRoll

The clearest difference is in-app purchases: DRFT MRKS at none against SeaRoll's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SeaRoll sells 1 one-off in-app purchase. DRFT MRKS asks for nothing beyond the download.

DRFT MRKS ships an update monthly, SeaRoll every 3 weeks. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | DRFT MRKS | SeaRoll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/drft-mrks/id6741070099/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 60 MB | 13 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tymor Marine Ltd](https://appshunter.io/developer/1769206109) | [Vladyslav Yarmak](https://appshunter.io/developer/1456545549) |

## What reviewers say

### DRFT MRKS

[App page](https://appshunter.io/ios/app/drft-mrks/id6741070099)

This application uses AI and deep learning to accurately measure a vessel's draft from a short HD video. It aims to provide a verifiable source of truth for calculating vessel displacement, improving accuracy in determining loaded cargo and equipment.

**Highlights:** AI/Deep Learning technology, Measures vessel draft from video, Improves draft reading accuracy, Verifiable source of truth, Calculates vessel displacement

**Features:** macOS Compatibility

**In-app purchases:** none


### SeaRoll

[App page](https://appshunter.io/ios/app/searoll/id6756269783)

This application provides a real-time display of a vessel's rolling angle, allowing users to record and review sessions during navigation. It's designed for simplicity and readability, enabling quick reporting and discussion of roll data.

**Highlights:** Live roll angle display, One-tap roll recording, Playback and review of recorded sessions, Export and share recordings, Simple and readable interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Logo | $0.99 | one-time |


## Frequently asked questions

### Is DRFT MRKS free?

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

### Is SeaRoll free?

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

### Do DRFT MRKS or SeaRoll have ads?

Neither DRFT MRKS nor SeaRoll shows ads.

### Which is updated more often, DRFT MRKS or SeaRoll?

DRFT MRKS ships an update monthly, and SeaRoll every 3 weeks. Most recently, DRFT MRKS was updated on October 20, 2026 and SeaRoll on October 15, 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.*