DRFT MRKS vs SeaRoll
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DRFT MRKS
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.
- AI/Deep Learning technology
- Measures vessel draft from video
- Improves draft reading accuracy
- Verifiable source of truth
- Calculates vessel displacement
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Tymor Marine's breakthrough DRFT MRKS technology measures a vessel's draft from a 30-second, 1080p HD video. It is an industry-leading AI/Deep Learning technology developed to improve the traditional draft reading process. DRFT MRKS aims to allow anyone to read draft marks with the same skill and accuracy as an experienced mariner. Discrepancies can lead to incorrect displacement measurements, spark disputes over cargo quantities, and impose operational limitations on vessels. DRFT MRKS provides a single verifiable source of truth when calculating vessel displacement using draft marks, helping to improve accuracy when determining loaded cargo/equipment.
SeaRoll
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.
- Live roll angle display
- One-tap roll recording
- Playback and review of recorded sessions
- Export and share recordings
- Simple and readable interface
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SeaRoll is a maritime clinometer built for real-world conditions. Measure your vessel’s rolling angle in real time, record sessions during navigation, and review the results later. Capture roll data with one tap, then share your recordings with crew, colleagues, or shore teams for quick reporting and discussion. SeaRoll keeps the interface simple and readable, so you can focus on what matters on deck. Key features Live roll angle display One-tap roll recording Playback and review of recorded sessions Export and share recordings SeaRoll is designed for seafarers, surveyors, and anyone who needs a clear roll measurement tool in the field.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | DRFT MRKS | SeaRoll |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 60 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Tymor Marine Ltd | Vladyslav Yarmak |
Customer experience
DRFT MRKS
SeaRoll
In-app purchases
DRFT MRKS
No in-app purchases
SeaRoll
- Remove Logo$0.99






