OffshoreSMS vs CallSign
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OffshoreSMS
This app provides commercial vessel owners, skippers, and crew with essential tools for maritime safety management. It simplifies the creation and real-time updating of safety management systems, ensuring all crew members have access to critical information. The platform aims to reduce paper usage and streamline safety processes on board.
- Real-time SMS updates for crew
- Digital vessel logs and forms
- Crew qualification and induction management
- Passenger manifest creation
- Expense logging and receipt saving
- Personal Mariner Profile creation
- Fleet management tools
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FREE to download and FREE to create a user profile, the Offshore SMS has been developed to give commercial vessel owners, skippers and crew the tools they need to be safe on the water, anywhere in the world. Every vessel should have a safety management system (SMS) or safety management plan, and everyone on the boat, from the owner to the crew, must know where it is, what is in it, and how to use it. The OffshoreSMS app makes this easy! Owners and masters can build and update the SMS in real time from anywhere on earth. Every change is synced in real time to every crew member on the boat, and all crew have the SMS right in their pocket! Whether you're based, or whatever your operation, OffshoreSMS will simplify safety on your vessels, plus give you a ton of easy-to-use tools to save you time and money, and all with zero paper!! If you're a crew member on a vessel, there is no cost whatsoever! Simply download the app and search for the vessel you work on, then request crew access to start using the app! Created with input from commercial vessel operators from day one, our aim is to simplify the process of running a vessel safely and reducing paper on your boat. We've made it super easy to add a vessel, connect with other users on the app and induct them as crew, and do all of the legally required vessel logs. Offshore SMS features include: • Quick signup through the app • Update your own personal profile and be found by other vessel skippers • Great for everyone on any commercial vessel anywhere • Add as many free vessels as you like and all have unlimited free ships logs • Use our in-app helpers to build a compliant SMS or SMP in minutes • Manage crew qualifications and inductions with signatures • Log defects, schedule maintenance or even create your own custom forms • Create passenger manifests and do live head count logs • Log anything from pre-starts to fuel and engine hours, to the ship's log • Add unlimited crew and get a signed induction in the app • Record important dates for your vessel (safety gear, expiry dates etc) * Choose from a range of annual subscription options from less than $1/week per vessel NEW Features for Charter and Passenger vessels: • Create a Passenger Manifest for each trip with all passengers' personal information • Check passengers on and off in real time • Create a separate Passenger Induction checklist and induct passengers with easy prompts • Masters can do quick head counts from the app and save them in the cloud - no clickers, no paper! NEW Features in 2024: • Workflows - create and manage larger jobs and add small tasks for other team members! • Expense logs - record expenses on board and save receipts, invoices or bills per supplier • A new personal Mariner Profile - your new marine resume! • Mark vessels, plant and equipment as offline / tagged out • New Marine Fleets - now fleet owners and managers can view live fleet activity, monitor stats, and manage assets and team members right from the app! • New crew warnings for skippers at startup • Now log multiples drills at one time! PLUS: * Crew change logs * Custom log review screen * Scheduled maintenance by TIME as well as ENGINE HOURS * Location pin drops in Ship's Log Now, if you own or manage a fleet of vessels, use our app to connect your skippers to your fleet dashboard in real time! AND, if you employ multiple people on your vessel, set up to 3 different roles, each with custom access permissions! PLUS HEAPS MORE!
CallSign
Connect with qualified New Zealand Sign Language (NZSL) interpreters on-demand. This service facilitates communication in various settings, from clinics to remote work, ensuring accessibility during business hours. Registration is a simple, one-time process to enable quick connections whenever needed.
- On-demand NZSL interpreting
- Connect from any device
- Secure and private communication
- Simple registration process
- Available during business hours
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CallSign lets you connect with qualified New Zealand Sign Language (NZSL) interpreters quickly and easily. Currently available during business hours, the service is designed to help you communicate wherever you are — in clinics, offices, or remotely. Features include: On-demand interpreting: Register once and connect whenever you need an interpreter. Anywhere access: Use from any device with an internet connection. Secure and private: All interactions are confidential and professional. Getting started is simple - register in a few steps and start using the service today.
Screenshots
Verdict
The clearest difference is rating: CallSign at 5.0 against OffshoreSMS's 1.0. CallSign also leads on in-app purchases (none vs 4) and review sentiment (100% vs 83%). OffshoreSMS's advantage is update cadence (every 10 days vs monthly). On price, ratings volume, 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. OffshoreSMS sells 4 one-off in-app purchases. CallSign asks for nothing beyond the download.
CallSign holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 83% of OffshoreSMS's written reviews are positive against 100% of CallSign's.
OffshoreSMS ships an update every 10 days, CallSign monthly. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.
| Parameter | OffshoreSMS | CallSign |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 10 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 65 MB | 54 MB |
| Age rating | 4+ | 17+ |
| Developer | Offshore SMS Pty Ltd | Primaxis Pty Ltd |
Customer experience
OffshoreSMS
CallSign
In-app purchases
OffshoreSMS
- Digital Logs Plan$31.99
- Digital SMS Plan$84.99
- OffshoreSMS LOGS + SMS$94.99
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- OffshoreSMS PRO Plan$159.99
CallSign
No in-app purchases
Questions
Is OffshoreSMS free?
Is CallSign free?
Which has better reviews, OffshoreSMS or CallSign?
Do OffshoreSMS or CallSign have ads?
Which is updated more often, OffshoreSMS or CallSign?
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