# ACR OLAS: Marine Alert System — Man Overboard Alert System > Man overboard alert system using smartphone and beacons for rapid crew recovery. (iPhone/iPad app by Ultimate Sports Engineering.) - Source: https://appshunter.io/ios/app/acr-olas-marine-alert-system/id1465222037 (this page in markdown: same URL + `.md`) - Developer: [Ultimate Sports Engineering](https://appshunter.io/developer/1179244787) - Category: Sports, Navigation - Price: Free - Rating: 1.88/5 from 8 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 47 MB - Languages: English, French, German - Released: 2019-06-01 - Data updated: 2026-06-07 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/acr-olas-marine-alert-system/id1465222037/reviews.md ## What is ACR OLAS? The ACR OLAS App turns your smartphone or tablet into a Man Overboard Alarm system that aids fast recovery to rescue your crew, kids, pets who have gone overboard. When the Free app is paired with either the ACR OLAS TAG or the ACR OLAS FLOAT-ON beacons, the OLAS mobile application technology detects a break in its ‘virtual tether’ to the ACR OLAS Tag and/or Float-On within 8 seconds of a transmitter going missing. The mobile phone(s) then sounds an alarm and records the latitude and longitude of the incident using the phone or tablets GPS. ACR OLAS then aids the crew with the MOB recovery by clearly directing them to the GPS location where the MOB occurred with clear visual signals and bearing data. ACR OLAS stores all location data and time of incident required by the rescue services. Other ACR OLAS APP Features: • Protect everyone onboard your boat including Crew, Family, Kids, and Pets • ACR OLAS App creates a virtual tether to the Tag or Float-On creating a wireless MOB System • No cell service required (except for Solo mode) • Connect multiple OLAS transmitters to 1 phone or tablet • Connect 1 OLAS transmitter to multiple phones / tablets • Solo Mode (Text Message Alerts to Emergency Contacts with GPS coordinates) • App Navigation: Back to point of loss • Automatic VHF script for MOB alert ## Key features - Man Overboard Alarm System - Virtual tether detection - GPS location recording - Visual signals and bearing data - Stores incident data for rescue services - Solo Mode with text alerts - Navigation back to point of loss ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/acr-olas-marine-alert-system/id1465222037/reviews.md ### 1/5 — ARC OLAS Guardian JUNK *2022-05-29* What a waste of Time and Money, first the wire diagram does not match Mercury as I have two purple wires at the cut off switch. The app picture shows that you should see a float-on if the tag is set for “Cut-Off and Alert” I can only get a picture of the wrest tag. The engine will not shut off and I have tried exchanging the wires. Other options appear on the app such smart key, disable cut-off, enable smart lock and others with no explanation of how to use these or what they do in any of the directions. I have called and spoke with I believe Filex he was nice enough but had no idea what I was talking about said he would have his supervisor Chris get in touch with me but never did . I have now sent an email but I don’t expect much. Save your money and time look elsewhere! This is supposed to be a safety item and I believe is Junk! ### 5/5 — Works perfectly, love it *2021-09-11* Installed the Guardian in the boat, and it works great with the wearable OLAS tag. Great option for being out by myself and having some mobility on the boat rather than being clipped to kill switch tether. Time to buy more tags for the rest of the family :-) ### 1/5 — garbage - do not waste your time *2021-06-09* Garbage app. Cannot get it to stay connected or update any settings on my Olas Guardian no matter what. Thankfully, the guardian still works on it's own, but there's no way to update / change settings / anything since the application is literally hot garbage. Do not waste your time with this until it's updated by a software engineer / developer team that actually understands what is needed and how to implement it. ### 3/5 — Does not track and does not work if you just fall overboard *2021-06-03* The box is misleading, this will not track the unit that fell in. It only tracks the location of the phone when it separated from the unit. This unit could be so much more. The wrist band needs to sense water and activate instantly if detected even if the person is waving their arms above water. In rough seas, 8 seconds plus a hundred feet is too far to find someone. Also, there should be a 2 second mode. If your in the marina and a child or pet falls or slips overboard the unit should instantly activate not after 8 seconds.. But I'm giving it 3 stars because it's better than nothing and is a good idea. If you get a water sensing technology one, I'll buy it. ### 1/5 — You don’t want to rely on this in a life or death situation *2021-05-25* I usually don’t write reviews, but I feel on a safety product like this one I have an obligation to warn others: Tracking is inaccurate and intermittent. Specifically, loses / cannot establish connection to OLAS GPS transmitter in MOB mode, which is obviously the whole point of this device. Frankly, it undermines my trust in the ACR brand and makes me wonder how well my other ACR products work in an emergency. On the plus side, it looks cool, so if your primary use is bolstering your offshore credentials in a nightclub, highly recommended ... ### 1/5 — Dangerous junk! *2021-02-19* I have 4-5 ACR products and almost all of them have failed in a year or less. The stuff they churn out is very cheap Chinese junk. My OLAS light almost never shows tracking on my phone and when it is not blinking on and off it points exactly opposite to where there light is. If you buy this and a man goes overboard with this device and app... might as well write them off as DEAD! ### 2/5 — No help for this app *2020-08-13* I recently received my tag and downloaded the app. I tried the tag and it works but there is no way In the app to change the setting to solo or put in automatic call number without using the vessel information page which you can’t use if you don’t have an MMSI number. And if you click the app help link it just takes you to the ACR page which doesn’t give any direction on how to use the app So this is basically useless to me Update 8-13-2020 Playing around with the app on my iPad instead of the iPhone, I found that when you hit the menu selection button in the left upper corner, a drop down box appears in gray and you can select items such as solo mode and vessel. However, on the iPhone , there is a glitch and this area is blacked out and you can’t see the wording which is in black. If you hit different spots you can get lucky and hit the menu option you were searching for. This is only on the phone, the iPad works fine. On a side note, I emailed the company and no one responded. I love ACR products and have several but the app and response isn’t great ### 2/5 — Solo mode bug *2020-02-29* Easy app to navigate but there is a bug in the Solo mode data entry window preventing entry of your emergency contact phone number. It looks like its entered but because of the entry keyboard formatting error, you can’t enter a “+” symbol. This is probably why it doesn’t send a text?. They have allowed the phone number entry format for the time delay window instead. Hopefully someone will read this and fix it!!! **Developer response:** Hi frxzjyt, I have looked into your problem. The + is already input into the Emergency number box so you only need to enter your countries code and then your number. For example +61 412 345 678 you would only need to enter 61412345678. Please test this and if you have any further questions do not hesitate to ask. Best regards, OLAS Team ### 1/5 — Does Not Work On iPhone or iPad *2020-02-06* I bought 4 of the wrist units to go along with this app and the system does not function reliably. The wrist unit gets about about 100 feet away from the phone or iPad before the alarm sounds and when it does it randomly switches between MOB and paused. It does not allow you to track back to the last location. This is a complete piece of crap and when I called the company they got back to me and verified the issue. No fix yet. Wasted several hundred bucks on these wrist units. Don’t waste your money.... actually a pretty dangerous situation as you are expecting to be able to track back to last location. Somebody is going to die because this did not work. **Developer response:** Update - We have just released an update which has removed the 'Paused' location status making it easier to indicate when a device looses connection. Connection does temporarily get broken for number of reasons but if it reconnects within 8 seconds the alert is not activated, if longer than 8 seconds it is calculated that the tag has gone out of range and/or fallen overboard and the alert is activated. Hi cmarem, Thank you for highlighting your experience with the OLAS App. I hope the below information encourages you to re-test the system for the purpose it is designed. The system is based on a positive connection and designed to be used on a vessel at sea, up-to 40ft in length. If a user is overboard the tag will be submerged and the connection between tag and phone broken. After an 8 second delay (to ensure the tag was not temporarily out of range) the alarm on the OLAS app will sound and the GPS location recorded (normally with 10-20 meter accuracy subject to your mobile devices GPS status). If trying to simulate this on land you would experience the 100ft break point as you are breaking connection due to distance not due to the tag being submerged, then adding on 8 seconds for you to continue walking. It is also important to note that once the alarm has been triggered, if the tag reconnects, the alarm is automatically cancelled and a pop up appears for 5 seconds to indicate that this has occurred. This allows the GPS location to be updated if the tag comes back into range and then is lost again. To track back to the last know position you first need to be +20 meters away from the stored GPS position, as if the vessel was sailing on. You are then given a clear arrow and distance to the stored GPS location. If you require a faster alert time we offer the ACR OLAS Core, with a possible 2 second default time before alert, it then sounds an alarm on the Core unit and the mobile app. This is compatible with your ACR OLAS tags. If you have any further questions do not hesitate to contact us directly. All the best, OLAS Team ## Frequently asked questions about ACR OLAS ### What is ACR OLAS? ACR OLAS is a marine alert system that turns your smartphone into a Man Overboard Alarm. It works by detecting a break in its virtual tether to paired ACR OLAS TAG or FLOAT-ON beacons. ### How does ACR OLAS help with man overboard situations? When a beacon is lost, the app sounds an alarm and records the exact GPS coordinates of the incident. It then provides clear visual signals and bearing data to guide the crew back to the location for recovery. ### Does ACR OLAS require cell service? No, the core functionality of ACR OLAS does not require cell service. However, the 'Solo Mode' feature, which sends text message alerts to emergency contacts, does require cell service. ### Can I connect multiple devices to ACR OLAS? Yes, you can connect multiple OLAS transmitters to a single phone or tablet. Conversely, you can also connect one OLAS transmitter to multiple phones or tablets. ### What is Solo Mode in ACR OLAS? Solo Mode is a feature designed for single-person operation. If you go overboard, it automatically sends text message alerts with GPS coordinates to your designated emergency contacts. ### What devices is ACR OLAS compatible with? ACR OLAS is available for iPhone, iPad, and iPod devices. It requires iOS 11.0 or later. ### How often is ACR OLAS updated? The app was last updated on October 25, 2023, with version 2.1.3. This indicates a relatively recent update, suggesting ongoing support and potential for future improvements. ### What is the user rating for ACR OLAS? ACR OLAS has a user rating of 1.9 stars based on 8 ratings. This indicates that current users have expressed significant dissatisfaction, which is important to consider. ## Version history (last 5 releases) ### 2.1.3 — 2023-10-25 - User can send standby command when app connected to Guardian. ### 2.0.1 — 2023-03-06 An additional feature within the firmware updating process to allow partially updated hardware to be restored. ### 2.0.0 — 2023-02-08 ACR OLAS App v2.0 gives the ability to update your ACR OLAS hubs firmware to version 2.0. Firmware 2.0 includes updated to make functionality easier and to allow increased scalability. - Integration of the new ACR OLAS T2 - Connection to new EXTENDER firmware - ACR OLAS transmitter connection management - Customisable Detection time - Customisable Alert Delay time - ACR OLAS Smart Lock integration (ACR OLAS Guardian only) - Skipper and passenger tag allocation (ACR OLAS Guardian only) ### 1.24 — 2022-07-22 New OLAS transmitters entering the phones range will need to be 'Tracked' by the user. This avoids false alarms generated by OLAS transmitters that pass by on other vessels. ### 1.23 — 2022-06-07 Essential user information update for Extender users. ## Apps similar to ACR OLAS | App | Rating | Price | Category | | --- | --- | --- | --- | | [i-Boating:HD Gps Marine Charts](https://appshunter.io/ios/app/i-boatinghd-gps-marine-charts/id1216013180) | 4.4 (92) | Free | Sports | | [CR MAP by Canyon Runner](https://appshunter.io/ios/app/cr-map-by-canyon-runner/id6480526542) | 4.9 (7) | Free | Sports | | [Yacht Timer](https://appshunter.io/ios/app/yacht-timer/id866745260) | 4.5 (10) | Free | Sports | | [Climbing Pins](https://appshunter.io/ios/app/climbing-pins/id1360866980) | 5.0 (6) | Free | Sports | | [Florida Sport Fishing TV PLUS](https://appshunter.io/ios/app/florida-sport-fishing-tv-plus/id6476883346) | 3.7 (3) | Free | Sports | | [NEFMA](https://appshunter.io/ios/app/nefma/id1538716070) | — | Free | Sports | ## More apps by Ultimate Sports Engineering - [Exposure SYNC](https://appshunter.io/ios/app/exposure-sync/id1436503167) - [OLAS: Wireless Marine Safety](https://appshunter.io/ios/app/olas-wireless-marine-safety/id1477987097) - [Exposure SYNC V2](https://appshunter.io/ios/app/exposure-sync-v2/id1608351505) - [Guardian Pro](https://appshunter.io/ios/app/guardian-pro/id6504238761) All apps by Ultimate Sports Engineering: https://appshunter.io/developer/1179244787 ## Related topics [ultimate sports engineering](https://appshunter.io/ios/topics/ultimate-sports-engineering) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*