Comparison

Boat Beacon vs CalypsoSailing

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

Head to head
About

Boat Beacon

This marine navigation app provides real-time AIS data for collision avoidance and position sharing. It offers over-the-horizon warnings, background operation, and a user-friendly interface for boaters.

Highlights
  • Collision warnings with CPA calculations
  • Real-time AIS ship tracking
  • Background operation for continuous alerts
  • Position sharing with other users
  • Augmented Reality view (IAP)
  • Man Overboard and Anchor Watch alarms (IAP)
Features
Currently charting
Read full description

Boat Beacon is an internet AIS receiver and transmitter for your iPhone and iPad. It is the only AIS ship tracking app to provide Collision Warnings, share your boat’s position & use real-time AIS data. Connected to the largest network of AIS shore receivers world-wide covering most major ports, harbours and popular coastal areas. “An outstanding app, with great potential. Both interesting to use and very user friendly. This could be a life saver and especially of interest to small boat users. Everyone who goes on the water should have this on and use it!” ***** Sun Dream, App Store Review Boat Beacon is designed for boaters & provides continuous Bearing, Range & Closest Point of Approach (CPA) calculations and alarms in addition to standard AIS information even when in the background. Boat Beacon does not require any external AIS transponder or receiver equipment. Key Features ------------ Over-the-horizon collision avoidance (30 miles radius) using continuous CPA calculations - highlights boats that are on a potential collision course and alerts you with an alarm. Continually transmits and receives position information via the internet and calculates and alarms CPA even when the app is in the background. Shares your position with Internet AIS Systems & apps & other Boat Beacon users in real time. Real time ship map view with North up & Heading up modes so you can look in the direction of the ships on the map to locate them. Nav display showing own boat's speed, course, heading and position. SART Alarm Man Overboard tracking, Anchor watch & Theft alarms (IAP). Apple Watch App included Siri voice commands Apple Critical Alerts support Export tracks Boat-to-Boat & Group Messaging. Local AIS & GPS via Wifi. Boat Beacon InApp Add-ons (IAP):- - LiveView - Augmented Reality view with ships, compass & horizon overlaid. Works with FLIROne IR cameras as well to see ships & people in the dark & fog - "AIS Sharing" to other apps like Navionics & iNavX - US, UK and IE Marine raster charts. - MOB and Anchor Watch. Let Friends and Family see where you are and where you're headed to with our free Boat Watch app or on web-based AIS systems like MarineTraffic which have free web viewers available. Arm all the crews in a race with Boat Beacon and have real time updates on the race positions on the water and back in the club house. Keep a watch and in touch with other boats in your flotilla when sailing in a group. Boat Beacon requires internet access to work. Most popular coastal areas have cellular data access extending 12 or more miles out to sea. Subscriptions The "AIS Sharing " subscription is monthly ($5.99) or yearly ($16.49), and will automatically renew at the end of the subscription period unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the iTunes account holder and auto-renewal may be turned off by going to Account Settings after purchase. 
No cancellation of the current subscription is allowed during active subscription period. Terms of Use: http://seanav.net/termsofuse.php Privacy Policy: http://seanav.net/privacy.php Support: help@pocketmariner.com Your position can be shared and seen on all our apps without using an MMSI number. To be seen on Global AIS systems like MarineTraffic you need an MMSI number. In the US you can obtain one by visiting http://www.boatus.com/mmsi or email us for a free internet MMSI number. Please note that continued use of GPS running in the background can dramatically decrease battery life. NOT FOR NAVIGATION Boat Beacon should only be used for basic navigation reference and should not be solely relied upon to determine precise locations, proximity, distance, or direction. You will not be visible to other ships on VHF only AIS systems.

About

CalypsoSailing

Features
Read full description

CalypsoSailing — Wind, Polar & Sailing Instruments CalypsoSailing turns your phone into a full sailing instrument panel, paired directly with your Calypso Instruments Bluetooth wind sensor. Live wind, GPS speed, heading, and true sailing performance — all in one app, built for sailors who want real data, not estimates. LIVE WIND & NAVIGATION INSTRUMENTS Connect your Calypso ULTRASONIC anemometer and get real-time apparent and true wind angle (AWA/TWA), apparent and true wind speed (AWS/TWS), true wind direction (TWD), speed over ground (SOG), course over ground (COG), and velocity made good (VMG) — all on a fully customizable compass dial. Long-press any card to choose exactly which variable you want to see, in the units you prefer (knots, m/s, km/h, mph). YOUR BOAT'S REAL SAILING POLAR This is what sets CalypsoSailing apart: instead of relying on a generic manufacturer's polar diagram, the app builds a true performance polar for your own boat, automatically, every time you sail. Create a profile for each boat you own, mark it active, and go sailing — the app quietly learns how fast your boat really goes at every wind angle, port and starboard, session after session. Watch your Polar Confidence grow from LOW to HIGH as your data accumulates. Switch between boats mid-session and the app splits the data correctly between them. Export any boat's polar as an image to share, or as a transferable file to move it to another device — perfect for crews who sail the same boat from different phones. TRACK, GRAPHS & CHARTS IN ONE PLACE A single tab brings together your live course trail, historical wind and angle graphs, and your performance polar — swipe between them with one clean control. Every screen adapts automatically to landscape orientation for a full instrument-panel view at the helm. NAUTICAL CHART & GPS TRACKING A full-screen chart with OpenStreetMap and OpenSeaMap seamarks, satellite imagery toggle, live GPS tracking with a "follow me" mode, and a projected heading line so you always know where your bow is pointing. Every sailed track is recorded automatically and can be reviewed later. SAFETY FEATURES A one-tap Man Overboard (MOB) button, always visible on every screen, instantly marks the exact GPS position and timestamp of the moment it's pressed — the point is dropped straight onto the chart so you can navigate back. An anchor drag alarm lets you set your anchor point and a safety radius: if your boat drifts beyond it, the app sounds an alarm and flashes your phone's torch, even below deck. These features are safety aids, not a replacement for proper seamanship and dedicated marine safety equipment. COMPLETE SAILING LOGBOOK Every session is automatically logged with wind, speed, and GPS data. Review detailed graphs for apparent and true wind, plus temperature, pressure, and humidity where available. See your full sailed route on a map with tappable points showing your exact speed and wind at any moment. Export sessions as CSV or a shareable HTML report. LIVE WEATHER, ANYWHERE No WeatherDot connected? CalypsoSailing can still show you temperature and pressure for your exact GPS position using live forecast data — and automatically switches to your onboard sensor's real measurements the moment it's connected. BUILT FOR REAL SAILING CONDITIONS A red-on-black night mode preserves your night vision on deck. A guided in-app tutorial shows you every feature exactly where you'll use it. Available in English, Spanish, and French, with automatic language detection based on your region. WORKS WITH Calypso Instruments ULTRASONIC anemometer (wind speed, angle, and battery over Bluetooth Low Energy) and Calypso WeatherDot (temperature, humidity, and pressure). CalypsoSailing is built by Calypso Instruments for sailors who want their instruments to know their boat as well as they do. No subscriptions, no ads — just your wind, your data, your polar. Learn more at calypsoinstruments.com

Screenshots

Boat Beacon4 screens
CalypsoSailing4 screens

Verdict

The call

The clearest difference is price: CalypsoSailing at Free against Boat Beacon's $14.99. CalypsoSailing also leads on in-app purchases (none vs 6) and iOS requirement (15.0 vs 17.0). Boat Beacon's advantage is chart position (#70 vs unranked). On 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

CalypsoSailing is free to download; Boat Beacon costs $14.99 up front. Boat Beacon sells 6 in-app purchases, starting at $5.99 per month. CalypsoSailing asks for nothing beyond the download.

Scorecard4 real differences · 7 level
Boat Beacon versus CalypsoSailing: the parameters behind the verdict, then further details
ParameterBoat BeaconCalypsoSailing
Price$14.99Free — better
Rating4.6 (868 ratings) — better—
Positive reviews61.1% of reviews—
Number of ratings868 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#70 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size152 MB25 MB
Age rating4+4+
DeveloperPocket Mariner Ltd.Calypso Instruments

Bugs and requests

Boat Beacon

Reported bugs

4 issues
  • Crashes when panning or changing settings
  • Phantom ships not disappearing
  • Inaccurate position data
  • Compatibility issues with older devices

Requested features

4 requests
  • Add marine charts
  • Improve search functionality
  • Offline mode
  • Integrate with other navigation apps

CalypsoSailing

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Boat Beacon

Subscriptions2
  • AIS Share$5.991 Month
  • AIS Share$16.491 Year
One-time4
  • Anchor Watch and Man Overboard$4.99
  • Live View Upgrade$7.99
  • NOAA US Marine Charts$9.99
Show 1 more
  • UK & IE Marine Charts$12.99
None

CalypsoSailing

No in-app purchases

Questions

Is Boat Beacon free?
Boat Beacon costs $14.99, and also offers in-app purchases.
Is CalypsoSailing free?
CalypsoSailing is free to download, with no in-app purchases.
Do Boat Beacon or CalypsoSailing have ads?
Neither Boat Beacon nor CalypsoSailing shows ads.

Other comparisons