Class surveyor vs Sail Assist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Class surveyor
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Class surveyor - it's our new assistant app for surveyors, shipowners, UTM operators. Depending of ship age and type - our app will privide you scope of ship inspections and thickness measurements in accordance with IACS Requrements. App include LSA Code and SOLAS requirements for liferafts and lifeboats. Try to use our free app in your marine duties - it will help you!
Sail Assist
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◆ Fuel Switching Before ship enter Emission Control Area (ECA), it notifies you at the timing set by you. You can do fuel switching task with plenty of time to spare. The notifications are before you do fuel switching, when you start fuel switching, and when you should end fuel switching. It will also notify Smart Ship Viewer (SSV) and SSV Mobile that the fuel switching has been done. ◆ NGA notification Users can set up No-Go Areas (NGA) in advance and be notified when they enter the NGA. ◆ Chat communication You can chat with Sail Assist users on the same boat or SSV Mobile users. You can also send photos and images. In the event of an emergency, you can switch to warning mode and notify chat group members. ◆ Alert Notification This app notifies you of emergencies, off-course incidents from the planned route, and BAM alert occurring onboard the ship. ◆ Display for Alert History In case of emergencies or off-course incidents from the planned route, get notifications of the situation. ◆ Marine Equipment Manual Display ECDIS, VDR, etc. equipment manual. 【Notes】 ・This app requires SSV contract. ・This app requires either J-Marine NeCST, J-Marine Box, or VDR from JRC installed on the vessel.
Screenshots
Verdict
The clearest difference is iOS requirement: Class surveyor at 11.0 against Sail Assist's 16.4. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Class surveyor ships an update every 7 months, Sail Assist every 4 months. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.
| Parameter | Class surveyor | Sail Assist |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 58 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | OLEKSANDR IZERGIN | Japan Radio Co.,Ltd. |
In-app purchases
Class surveyor
No in-app purchases
Sail Assist
No in-app purchases







