Comparison

Seapilot vs PyNav

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

Head to head
About

Seapilot

Navigate like a professional with this marine navigation app. It offers vectorized chart data, AIS, and weather forecasts, bringing merchant shipping technology to your mobile device. Plan trips, track your vessel, and access advanced navigation tools.

Highlights
  • Vectorized S-57 chart data
  • Automatic Identification System (AIS)
  • Built-in weather forecasts
  • Positioning and background positioning via GPS
  • Man Overboard function
  • Premium features like Weather Routing
Features
Read full description

Professional marine navigation used to require an expensive GPS plotter. Now, same technology used in merchant shipping is available for the iPad and iPhone.  Seapilot lets you navigate like a pro with vectorized S-57 chart data from National Maritime Administrations. This is the first navigation app to feature Automatic Identification System (AIS) and built in weather forecasts, when within a mobile network. Charts and features available as In-App Purchase. Use it to navigate, to plan tomorrow’s boat trip or reminisce about yesterday’s. (PS. Even works in your sofa at home.) Seapilot features: • Free trial period of included functionallity • Professional navigation based on merchant shipping standards for ECDIS (Electronic Chart Display and Information System) • S-57 chart data (In-App Purchase) and AIS data from National Maritime Administrations  • Developed by True Heading, leaders in marine navigation and communication at sea, with cutting-edge AIS and VHF know-how Functions: Δ Positioning and background positioning via GPS  (Continued use of GPS running in the background can dramatically decrease battery life) Δ Visualization of S-57 chart data from National Maritime Administrations  Δ Autonomous navigation - charts (In-App-purchase) downloaded to the device  Δ Option of tracking your own boat on the chart Δ Displays position, course and speed Δ Adjustable own speed and course vector  Δ Man Overboard function Δ Display settings for day, dawn/dusk and night Δ Past track Δ Plotting/marking objects Δ Electronic bearing and range marker from own vessel Δ True Motion and adjustable North Up / Head Up chart orientation Δ Chart object search Δ AIS target search Δ Setting of safety contour (2, 3, 6, 10 and 15 meters) Δ World chart for rough overview/orientation Δ Facebook integration; share position with friends or all users, list friends, show friends or all users on chart, post on was Premium: Δ Routes Δ Weather Routing Δ Weather Forecast, High quality 5-day Coastal Weather Forecasts. Δ AIS data from National Maritime Administrations via Internet (3G or WLAN)  Δ Course and speed vector for AIS targets Δ NMEA-0183 interface for connecting external GPS/AIS via WIFI Δ Import/Export to GPX-file == Auto-renewable subscriptions in Seapilot == • Seapilot Premium, Annual Subscription: $39.99 • Swedish Charts with automatic updates, Annual Subscription: $8.99 Payment will be charged to iTunes Account at confirmation of purchase Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase No cancellation of the current subscription is allowed during active subscription period Privacy Policy https://seapilot.com/privacy End User License Agreement https://seapilot.com/eula/ ==== Requirements: iOS 7.0 or later, iPad or iPhone with GPS. (External GPS unit can be used for other models.) Based on 140 years of experience, Seapilot has been developed by True Heading (www.trueheading.se/us) – experts at AIS, VHF, marine navigation and communication at sea.  • True Heading is a leader in AIS products with over 40 years of navigation experience. – An authority on professional navigation. Contact: Your input is essential in helping us further develop Seapilot. Feel free to contact us at info@seapilot.com. For the latest info, like Seapilot on www.facebook.com/seapilot.se

About

PyNav

This app provides NMEA instrument data and remote control for a pypilot autopilot. It can function as a standalone navigation hub, displaying wind, engine, and GPS data with customizable panels and configurable alarms.

Highlights
  • Pypilot autopilot control
  • NMEA instrument display
  • Customizable dashboard panels
  • Wind and engine data
  • GPS and waypoint navigation
  • Configurable alarms
Features
Read full description

NMEA NAVIGATION HUB + PYPILOT REMOTE CONTROL PyNav serves two kinds of sailors: - Have a pypilot autopilot? Control it from your iPhone/iPad AND display all your NMEA instruments. - No pypilot? Use PyNav as a standalone professional NMEA navigation hub. FREE VERSION - Autopilot tab + Settings Full control of the pypilot autopilot: - Engage / disengage the autopilot - Modes: compass, wind, GPS, true wind, navigation - Current heading + target heading entry - Real-time rudder angle indicator - IMU data: pitch, roll, heel, rate of turn - Full PID gain tuning (P, I, D, DD, PR, FF, WG, Deadzone) - IMU compass and rudder calibration - Tack settings - Pilot profiles (basic, wind, gps, simple, rate, absolute) - Servo stats: amp-hours, voltage, temperatures, runtime - Direct WiFi connection to the pypilot Raspberry Pi hotspot - no router needed The free version gives access to pypilot data only - no external NMEA instruments. PRO VERSION - Complete navigation hub One-time purchase, lifetime - no subscription. Works WITH or WITHOUT pypilot. Just needs a NMEA/WiFi module and an iPhone or iPad. Optimized for iPad - also works on iPhone with adapted layout. DASHBOARD - Customizable unified view 6 configurable, drag-and-drop panels: - Wind: dynamic rose or raw data grid - Navigation: SOG, COG, GPS data - Autopilot: engage/disengage, target heading, rudder indicator, IMU - Depth: color-coded - Pressure: hPa value, 3h trend, history chart - Engine: RPM with color coding (nominal / warning / danger) Resizable panels, 1 or 2 column layout. WIND - Apparent and true wind Dynamic wind rose, 5-minute history chart, real-time AWA/AWS/TWA/TWS. ENGINE INSTRUMENTS RPM, coolant and oil temperature/pressure, battery/alternator voltage, engine hours, fuel flow, exhaust and sea water temperature, gearbox state (Fwd/Neutral/Rev), transmission oil. Tank gauges: port/starboard fuel, fresh water, grey and black water. Unlimited custom charts (any parameter vs RPM or time). NAV - GPS and waypoint navigation Compass rose, true and magnetic heading, SOG, COG, STW, latitude/longitude (DD°MM'SS), waypoint navigation (bearing BTW, distance DTW, cross track error XTE), arrival indicator. CONFIGURABLE ALARMS On all NMEA data: depth, speed, heading, pressure, wind, RPM, temperatures, oil pressures, voltages, fuel levels, rudder angle. Each alarm: custom name, threshold, condition, individual on/off. Triggers: sound + vibration + on-screen banner. TECHNICAL REQUIREMENTS Free: iOS 13.4+, working pypilot setup (Raspberry Pi), direct WiFi connection to pypilot hotspot. PRO: any TCP/UDP NMEA/WiFi module (Yacht Devices, Quark-elec, Digital Yacht, Hat Labs, Actisense...) + iOS 13.4+. Pypilot optional. Supported protocols: NMEA 0183, NMEA 2000 Raw, Pypilot (TCP). SAFETY WARNING PyNav is a navigation interface. It does not replace mandatory navigation equipment. The skipper remains SOLELY RESPONSIBLE for navigation. Permanent watch at sea is MANDATORY. Pypilot is an open-source DIY project provided "as-is". PRIVACY No navigation data is sent to external servers. Runs 100% locally on your onboard network. No ads, no tracking. LEGAL Publisher: CL Consulting SASU - SIRET 94261399300016. GDPR compliant. Pypilot is an independent open-source project (Sean D'Epagnier, GPLv3). PyNav is not affiliated with the pypilot project.

Screenshots

Seapilot2 screens
PyNav3 screens

Verdict

The call

The clearest difference is review sentiment: PyNav at 100% against Seapilot's 38%. PyNav also leads on update cadence (every 5 weeks vs every 3 months). Seapilot's advantage is iOS requirement (9.3 vs 13.4). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Seapilot sells 18 in-app purchases, starting at $8.99 per year and PyNav sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Seapilot ships an update every 3 months, PyNav every 5 weeks. The most recent releases landed on September 11, 2026 and September 7, 2026 respectively.

Scorecard3 real differences · 7 level
Seapilot versus PyNav: the parameters behind the verdict, then further details
ParameterSeapilotPyNav
PriceFreeFree
Rating2.9 (15 ratings) — better—
Positive reviews38.1% of reviews100.0% of reviews — better
Number of ratings15 — better—
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better13.4
Further details — not scored
Size107 MB14 MB
Age rating4+4+
DeveloperSeapilotCL Consulting

Customer experience

Seapilot

All ratings15 ratings
Positive46.7%
Neutral6.7%
Negative46.7%
Written reviews21 reviews
Positive38.1%
Neutral9.5%
Negative52.4%

PyNav

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

18 purchases

Seapilot

Subscriptions14
  • Swedish charts with automatic updates$8.991 Year
  • East Canadian charts$14.491 Year
  • West Canadian$14.491 Year
Show 11 more
  • Spanish charts with automatic updates$17.491 Year
  • Finnish charts$19.491 Year
  • Dutch charts$19.491 Year
  • Irish charts$19.491 Year
  • British charts$19.491 Year
  • German charts$23.491 Year
  • Croatian charts with automatic updates$26.491 Year
  • Portuguese charts with automatic updates$26.491 Year
  • Greek charts with automatic updates$34.991 Year
  • Premium$39.991 Year
  • French charts$50.991 Year
One-time4
  • US EastFree
  • US WestFree
  • US-Great Lakes. One year subscription.$11.99
Show 1 more
  • US-West. One year subscription.$13.99
1 purchases

PyNav

One-time1
  • PyNav Pro$7.99

Questions

Is Seapilot free?
Seapilot is free to download, with in-app purchases available.
Is PyNav free?
PyNav is free to download, with in-app purchases available.
Do Seapilot or PyNav have ads?
Neither Seapilot nor PyNav shows ads.
Which is updated more often, Seapilot or PyNav?
Seapilot ships an update every 3 months, and PyNav every 5 weeks. Most recently, Seapilot was updated on September 11, 2026 and PyNav on September 7, 2026.

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