Comparison

OLAS vs divemate

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

divemate

Features
Read full description

divemate turns your Apple Watch and iPhone into a powerful, real-time scuba dive computer and intelligent logbook. Designed for both recreational and technical divers, divemate combines real-time Bühlmann ZHL-16C decompression calculations with interactive depth profiles, multi-gas tracking, and seamless wireless logbook synchronization. Whether you're exploring shallow reefs on Nitrox or planning multi-gas decompression dives, divemate delivers high-contrast, essential dive telemetry at a single glance. Terms and conditions: https://app.termly.io/policy-viewer/policy.html?policyUUID=b68726c4-e045-4a32-a8d0-657311a2cc69

Screenshots

OLAS4 screens
divemate4 screens

Verdict

The call

The clearest difference is in-app purchases: OLAS at none against divemate's 2. OLAS also leads on iOS requirement (15.6 vs 27.0). divemate's advantage is update cadence (weekly vs every 2 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. divemate sells 2 in-app purchases, starting at $8.99 per month. OLAS asks for nothing beyond the download.

UpkeepUpdate frequency

OLAS ships an update every 2 months, divemate weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 5 level
OLAS versus divemate: the parameters behind the verdict, then further details
ParameterOLASdivemate
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.6 — better27.0
Further details — not scored
Size22 MB15 MB
Age rating4+4+
DeveloperUltimate Sports EngineeringMichael Czolko

In-app purchases

None

OLAS

No in-app purchases

2 purchases

divemate

Subscriptions2
  • Monthly$8.991 Month
  • Ultimate Annual$69.991 Year

Questions

Is OLAS free?
OLAS is free to download, with no in-app purchases.
Is divemate free?
divemate is free to download, with in-app purchases available.
Do OLAS or divemate have ads?
Neither OLAS nor divemate shows ads.
Which is updated more often, OLAS or divemate?
OLAS ships an update every 2 months, and divemate weekly. Most recently, OLAS was updated on November 3, 2026 and divemate on October 31, 2026.

Other comparisons