NK vs SSV Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NK
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The NK-SHIPS mobile app is a mobile version of NK-SHIPS, which is a free, internet-based information service for the owners and operators of ClassNK registered ships. Users can access useful information to manage their fleet 24 hours a day via smartphones and tablets. Features - Browse ship particulars of your fleet that have been registered with ClassNK. - Easily monitor the status of surveys/audits, due dates, and expiry dates of certificates for these ships in your fleet anytime, anywhere. * Please note that you need to have a valid NK-SHIPS user account to use this app.
SSV Mobile
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◆Fleet Viewer Quickly understand your managed ships status with the Fleet Viewer. Visualize all your ships on the map and get more details about ship name, destination, ETA, and active route with a simple tap on the ship's icon. ◆Ship List Display Monitor all the ships under your management with the Ship List, displaying the ship name and the last received time of data. ◆Conning Display Utilize the Conning Display for sensor data, including latitude, longitude, and Speed Over Ground (SOG), as well as alert information. ◆Display for Track/ AIS / Voyage Information With the Display for track/ AIS / Voyage Information , visualize received track, AIS and Voyage information (route / user chart) on the map. ◆Emergency / Cross Track / BAM Alert Notifications Real-time notifications are provided for Emergency, Cross Track, and BAM Alerts occurring on managed ships. ◆Display for Emergency / Cross Track / BAM Alert history In case of Emergency, Cross Track, and BAM Alerts, get notifications of the situation. ◆Weather & Oceanographic Display Benefit from the Weather & Oceanographic Display, providing meteorological and oceanographic information such as wind speed and wave heights. ◆Chatting You can exchange messages in real time with this app, J-Marine NeCST onboard ships, and the Sail Assist app. It supports rapid communication during both normal operations and emergencies. ◆Navigational Warnings Display You can now display navigational warnings information on the map. ◆ECA Display You can now display ECA (Emission Control Area) on the map. 【Notes】 ・This app requires a separate Smart Ship Viewer (SSV) usage agreement. ・This app requires either J-Marine NeCST, J-Marine Box, or a VDR from JRC installed on the ship.
Screenshots
Verdict
The clearest difference is iOS requirement: NK at 11.0 against SSV Mobile's 14.0. 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.
Both ship on a similar rhythm, roughly every 6 months. Both last shipped on November 2, 2026.
| Parameter | NK | SSV Mobile |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 26 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | NIPPON KAIJI KYOKAI GENERAL INCORPORATED FOUNDATION | Japan Radio Co.,Ltd. |
In-app purchases
NK
No in-app purchases
SSV Mobile
No in-app purchases









