OLAS vs Sailserver
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OLAS
This app acts as a marine safety companion, tracking wireless safety devices to ensure crew, family, and pets stay onboard. It triggers alarms and logs GPS locations if a device goes out of range, aiding in rapid recovery and emergency services.
- Tracks OLAS transmitters (Tags, T2, Float-On)
- Virtual tether with high-volume alarm on breakage
- Logs GPS location for rapid recovery
- Solo Mode for automatic SMS alerts
- Direct tracking or receiver integration
- Engine immobiliser activation (with receiver)
- Battery status monitoring
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Exposure OLAS Mobile App – Smart Safety at Sea The Exposure OLAS mobile app is your essential onboard safety companion, designed to track OLAS transmitters (OLAS Tag, OLAS T2, or OLAS Float-On) and ensure all crew, family members, kids, and pets remain safely onboard. If the virtual tether between your mobile device and a transmitter is broken, OLAS immediately triggers a high-volume alarm and logs the GPS location to assist in rapid recovery. In the event of a prolonged rescue situation, OLAS provides a clear and concise location reference for emergency services. For solo sailors, SOLO MODE adds an extra layer of security by automatically sending an SMS with vessel details and coordinates if an overboard incident occurs. The OLAS app offers direct tracking of transmitters or can be used in conjunction with powered OLAS receivers for enhanced functionality. When connected to a receiver, the app acts as a remote control and additional alarm system, allowing you to manage alarms, select transmitters to track, and customise settings. Advanced Features with OLAS Receivers (Guardian & N2K): - Helm Tag Calibration – Set up for seamless operation. - Engine Immobiliser Activation – Enhance security with automatic engine shut-off. - Customisable Transmitter Names – Easily label and manage multiple devices. - Battery Status Monitoring – Ensure all OLAS tags are charged and ready. - Cut-Off Switch Control – Enable/disable the engine kill switch for specific transmitters. - Tag Management – Activate, disable, or pause tracking as needed. Advanced Features with OLAS Receivers (Guardian & N2K): - Customisable Transmitter Names – Easily label and manage multiple devices. - Battery Status Monitoring – Ensure all OLAS tags are charged and ready. - Tag Management – Activate, disable, or pause tracking as needed. - Alarm Management – Enable or disable alarms per transmitter. Features (Direct Tag Tracking): - Customisable Tag Names – Personalise for easy identification. - Battery Monitoring – Check battery levels for reliable operation. - Alarm Management – Enable or disable alarms per transmitter. - Pause Tracking – Temporarily disable monitoring when needed. The Exposure OLAS App provides unparalleled control, security, and peace of mind, ensuring that you, your crew, and loved ones are always accounted for while at sea. Stay connected, stay safe.
Sailserver
This app automatically logs your sailing trips, providing an online, up-to-date record. It also monitors your boat's position and alerts you to changes, and allows you to share your sailing adventures with friends and family.
- Automatic sailing logbook
- Boat position monitoring and alerts
- Share sailing trips with friends/family
- Connect with and follow other sailors
- View nearby boats in the Clubhouse
- Detailed weather map and forecast
- Connects to boat instruments (NMEA 2000/0183, SeaTalk)
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Automatic Logbook Sailserver automatically keep a logbook, each time you go sailing. The logbook can be viewed online and is always up to date. Anchor Watch and Monitor Sailserver monitors your boat when you are not onboard. Get notified when there are any changes in your boat’s position, wind speed or water depth. Share your passion for sailing. Friends and family can view the boat’s logbook, and live data from your boat instruments, even while you are sailing. Ideal for both cruising or racing. Connect with your friends or follow other sailors Connect with your friends and see where and how they are sailing. Or follow your favorite sailors when they are racing or on a long cruise. Meet other sailors When you enter the Sailserver Clubhouse you can see other boats near you and they can see your boat. Weather map Show a detailed weather map and forecast for the boat’s position. Connects to the boat instruments Sailserver can be connected to the boat instruments and collects data like wind direction and speed, water depths and temperature, Speed through water, boat heeling and much more. All data can be viewed online and are used to make a very detailed logbook. Sailserver connects to most brands like Raymarine, Garmin, B&G or other boat instruments with NMEA 2000, NMEA 0183 or SeaTalk Interface. Before using the Sailserver app please create a free account on sailserver.com. Some of the features in the Sailserver app are limited or not available without a Sailserver installed in your boat. If you do not have a boat with a Sailserver installed, you can still use the Sailserver app to follow or connect to other sailors with a Sailserver onboard. Read more about Sailserver and how to install it here: https://sailserver.com
Screenshots
Verdict
The clearest difference is review sentiment: Sailserver at 50% against OLAS's 0%. OLAS's advantage is update cadence (every 2 months vs every 8 months). On price, ads, in-app purchases and monetization model 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.
OLAS ships an update every 2 months, Sailserver every 8 months. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.
| Parameter | OLAS | Sailserver |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Update frequency | Every 2 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Ultimate Sports Engineering | Sailserver Aps |
Customer experience
OLAS
Sailserver
In-app purchases
OLAS
No in-app purchases
Sailserver
No in-app purchases








