Comparison

Doyle Guides vs PyNav

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

Head to head
About

Doyle Guides

Access comprehensive sailing guides for the southern Caribbean, featuring nautical charts, regulations, services, and points of interest. The app offers an interactive map with user-generated comments and corrections, all free to use. In-app purchases provide access to detailed guide book content.

Highlights
  • Comprehensive sailing guides
  • Nautical charts and navigation
  • Interactive satellite map
  • 3000+ points of interest database
  • User comments and corrections
  • Island-specific content bundles
Features
Read full description

Doyle Guides produces the southern Caribbean's most comprehensive and up-to-date sailing guides, complete with nautical charts and navigational information, details on regulations, customs and immigration, general and technical yacht services, marinas, restaurants, provisioning, shore-based attractions, and more. The Doyle Guides mobile app allows users to search our comprehensive 3000+ point of interest database with results shown based on distance from the user and displayed on an interactive satellite map where users can leave public comments as well as suggest corrections and new points of interest, all free of charge. Subscriptions to guide book content is available on both long and short term basis, as well as bundled by island.

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

Doyle Guides4 screens
PyNav3 screens

Verdict

The call

The clearest difference is review sentiment: PyNav at 100% against Doyle Guides's 60%. PyNav also leads on iOS requirement (13.4 vs 16.6). On price, update cadence, ads and in-app purchases 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. Doyle Guides sells 18 in-app purchases, starting at $9.99 per month and PyNav sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Doyle Guides ships an update monthly, PyNav every 5 weeks. The most recent releases landed on September 8, 2026 and September 7, 2026 respectively.

Scorecard2 real differences · 8 level
Doyle Guides versus PyNav: the parameters behind the verdict, then further details
ParameterDoyle GuidesPyNav
PriceFreeFree
Rating4.3 (50 ratings) — better—
Positive reviews60.0% of reviews100.0% of reviews — better
Number of ratings50 — better—
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.613.4 — better
Further details — not scored
Size41 MB14 MB
Age rating4+4+
DeveloperChris Doyle Publishing LimitedCL Consulting

Customer experience

Doyle Guides

All ratings50 ratings
Positive80.0%
Neutral8.0%
Negative12.0%
Written reviews10 reviews
Positive60.0%
Neutral10.0%
Negative30.0%

PyNav

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

In-app purchases

18 purchases

Doyle Guides

Subscriptions18
  • Trinidad & Tobago - 1 month3 Days trial$9.991 Month
  • Martinique Sailing Guide3 Days trial$19.991 Month
  • St. Lucia Sailing Guide3 Days trial$19.991 Month
Show 15 more
  • St. Vincent Sailing Guide3 Days trial$19.991 Month
  • Grenada Package - 1 month3 Days trial$19.991 Month
  • Trinidad Tobago Sailing Guide7 Days trial$19.991 Year
  • Martinique Sailing Guide7 Days trial$24.991 Year
  • St. Lucia Sailing Guide7 Days trial$24.991 Year
  • St. Vincent Sailing Guide7 Days trial$24.991 Year
  • Grenada Package - 12 months7 Days trial$24.991 Year
  • Southern Leeward Sailing Guide3 Days trial$24.991 Month
  • Northern Leeward Sailing Guide3 Days trial$24.991 Month
  • Windward Islands Guide3 Days trial$29.991 Month
  • BVI Cruising Guide3 Days trial$29.991 Year
  • Windward Islands Guide7 Days trial$39.991 Year
  • Virgin Islands Cruising Guide3 Days trial$39.991 Year
  • Leeward Islands Sailing Guide3 Days trial$39.991 Month
  • Leeward Islands Sailing Guide7 Days trial$59.991 Year
1 purchases

PyNav

One-time1
  • PyNav Pro$7.99

Questions

Is Doyle Guides free?
Doyle Guides is free to download, with in-app purchases available.
Is PyNav free?
PyNav is free to download, with in-app purchases available.
Do Doyle Guides or PyNav have ads?
Neither Doyle Guides nor PyNav shows ads.
Which is updated more often, Doyle Guides or PyNav?
Doyle Guides ships an update monthly, and PyNav every 5 weeks. Most recently, Doyle Guides was updated on September 8, 2026 and PyNav on September 7, 2026.

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