Comparison

iNavX vs Astron Skyfinder

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

Head to head
About

iNavX

This app provides comprehensive marine navigation tools, including worldwide chart coverage, weather forecasts, and AIS integration. It allows users to plan routes, track their position, and connect with onboard instruments for a complete boating experience.

Highlights
  • Worldwide marine chart access
  • Real-time GPS plotting
  • Waypoint and route management
  • GRIB weather forecasts
  • AIS integration
  • Nautical instrument connectivity
Features
Read full description

Marine navigation is made easy with iNavX - the world's #1 handheld Chartplotter. Access marine charts, maps, weather, AIS and more! iNavX is the only app to give you complete worldwide chart coverage, from all your favorite charts providers, including the ALL NEW iNavX Professional+ Chart series! Fully enabled with one-touch access, iNavX gives users access to the broadest set of marine charts and maps from multiple providers including: • iNavX Professional+ Charts • Blue Latitude • CHS • Explorer • Theyr Weather • Waterway Guide • … and more How does iNavX take handheld marine navigation to the next level? • Sailors - Plan sailing routes with waypoint and route management. Get proactive sail management with GRIB weather forecasts and then keep watch with AIS overlays and integration with your onboard systems. Plus, you can remember your great sailing locations by geotagging photos. • Boaters - Stay up to date on boating conditions with forecasts that include currents, winds, and swells. Manage your boating equipment with nautical instrument integration and then save great boating routes to share with the track log. • Anglers - Discover new fishing spots by scouting out holes and inlets. Locate the best fishing conditions by identifying cold fronts and save your best fishing spots with unlimited markers. Advanced features - iNavX is the most feature rich app available for all sailing and boating needs at a great price: Advanced Chart Plotter • Plot your position in real-time using your device's built-in GPS • Pan, zoom, and rotate charts (including course up) • Print detailed charts to use in combination with the app Advanced Navigation • Create waypoints and plan routes to navigate between them • Track log allows you to record your route • Import/export data in KML (Google Earth) or GPX format Advanced Instrumentation • Supports NMEA data over TCP/IP (using Wifi) • Integrates with external GPS, AIS receivers & transponders • Connect nautical instruments: Depth, Speed, Wind, Engine, Batteries, etc. Essential Toolkit • GRIB weather forecast • Tides/currents • Anchor alarm • AIS integration • Port/navaid search Download iNavX TODAY and automatically receive a complimentary copy of the official and up-to-date high-resolution NOAA RNC United States marine raster charts. REVIEWS “iNavX is the original and still one of the best navigation apps.” – Practical Sailor “The most full-featured navigation app around and viewed by many as the standard” – Sail Magazine "The #1 recommended marine charting app" - iMarineApps iNavX is Compatible with: Theyr Weather, Waterway Guide, AIS, Brookhouse, DigitalYacht, ShipModul, vYacht, Vesper Marine, NMEA 2000, Chetco and more. NEW CHART STORE Purchase all your favorite charts. Chart subscriptions vary by chart and provider from $9.99 to $199.99 annually, charged to your iTunes Account, which will automatically renew unless cancelled at least 24 hours before the end of the current period. Auto-renew can be turned off anytime by going to your Account Settings in iTunes after purchase. No cancellation of the current subscription is allowed during active subscription period. NOTE: Continued use of GPS running in the background can dramatically decrease battery life. MORE INFO Website: http://inavx.com/ User's Guide: http://inavx.com/help/ Terms of Use: http://inavx.com/terms Privacy Policy: http://inavx.com/privacy

About

Astron Skyfinder

Easily identify celestial objects in the night sky, whether using the naked eye, binoculars, or a telescope. It provides directions for viewing stars, planets, nebulae, and more, along with astronomical data like moon phases and sunrise/sunset times.

Highlights
  • Celestial object identification
  • Naked eye, binoculars, and telescope support
  • Moon phase tracking
  • Sunrise and sunset times
  • Season start times
  • Sidereal time calculation
  • Compass with azimuth display
Read full description

The comprehensive astronomy app that makes it super easy to find the most beautiful celestial objects. No matter whether you look at the sky with the naked eye, binoculars or a telescope: Astron shows you exactly which direction to look in order to see falling stars, constellations, the sun, the moon, planets, interesting stars, star clusters, nebulae and galaxies. In addition, the app has a variety of useful calendrical and astronomical functions: 1. When the next moon phases are. 2. The times of sunrise, sunset and twilight 3. The exact times of the beginning of the seasons. 4. The current sidereal times. 5. The shortest distance between any two places along the earth's surface. 6. A classic compass with azimuth display. Astron is available in 2 versions: the free Light version and the paid Premium version. Apple's standard Terms of Use applies: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/. Our privacy policy can be found here: https://astronapp.de/en/. HAVE FUN WITH ASTRON!

Screenshots

iNavX4 screens
Astron Skyfinder4 screens

Verdict

The call

The clearest difference is review sentiment: Astron Skyfinder at 93% against iNavX's 44%. Astron Skyfinder also leads on ads (none vs shown) and rating (5.0 vs 4.8). iNavX's advantage is ratings volume (22K vs 1) and update cadence (every 5 weeks vs every 6 months). On price, in-app purchases, monetization model 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. iNavX sells 11 in-app purchases, starting at $9.99 per month and Astron Skyfinder sells 6 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Astron Skyfinder holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: iNavX has 22K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 44% of iNavX's written reviews are positive against 93% of Astron Skyfinder's.

UpkeepUpdate frequency

iNavX ships an update every 5 weeks, Astron Skyfinder every 6 months. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.

Scorecard7 real differences · 4 level
iNavX versus Astron Skyfinder: the parameters behind the verdict, then further details
ParameteriNavXAstron Skyfinder
PriceFreeFree
Rating4.8 (22K ratings)5.0 (1 ratings) — better
Positive reviews43.8% of reviews92.6% of reviews — better
Number of ratings22K — better1
Update frequencyEvery 5 weeks — betterEvery 6 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#92 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size298 MB166 MB
Age rating4+4+
DeveloperNavX Studios LLCDr. Andre Schulz

Customer experience

iNavX

All ratings21,564 ratings
Positive95.9%
Neutral2.4%
Negative1.7%
Written reviews461 reviews
Positive43.8%
Neutral6.1%
Negative50.1%

Astron Skyfinder

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews27 reviews
Positive92.6%
Neutral0.0%
Negative7.4%

Bugs and requests

iNavX

Reported bugs

3 issues
  • Inability to remove waypoints
  • Inconsistent behavior when transitioning International Date Line
  • Disappearing or missing chart data

Requested features

5 requests
  • Seamless chart switching and panning
  • Integrated tidal and current data
  • Support for more chart types and providers
  • Improved route planning and editing tools
  • Automatic chart updates and management

Astron Skyfinder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

iNavX

Subscriptions11
  • Theyr Premium - Mobile (Monthly) for iOS$9.991 Month
  • iNavX Professional+ USA$29.991 Year
  • Navionics+ USA/Canada (iPhone)$29.991 Year
Show 8 more
  • Navionics+ Caribbean (iPhone)$44.991 Year
  • Theyr Premium Weather$49.991 Year
  • iNavX Professional+ USA Canada$59.991 Year
  • C-MAP World Chart$59.991 Year
  • Explorer Chartbooks - Bahamas$69.991 Year
  • Navionics+ USA/Canada (iPad)$79.991 Year
  • Navionics+ Caribbean (iPad)$79.991 Year
  • AIS Live$99.991 Year
6 purchases

Astron Skyfinder

Subscriptions2
  • Premium 1 Month7 Days trial$0.991 Month
  • Premium 1 Year$8.991 Year
One-time4
  • Upgrade LIGHT to ADVANCED$4.99
  • Upgrade ADVANCED to PREMIUM$5.99
  • Upgrade for Members$8.99
Show 1 more
  • Upgrade LIGHT to PREMIUM$9.99

Questions

Is iNavX free?
iNavX is free to download, with in-app purchases available.
Is Astron Skyfinder free?
Astron Skyfinder is free to download, with in-app purchases available.
Which has better reviews, iNavX or Astron Skyfinder?
Astron Skyfinder is rated higher. iNavX averages 4.8 out of 5 from 22K ratings, while Astron Skyfinder averages 5.0 from 1 ratings.
Do iNavX or Astron Skyfinder have ads?
iNavX shows ads; Astron Skyfinder does not.
Which is updated more often, iNavX or Astron Skyfinder?
iNavX ships an update every 5 weeks, and Astron Skyfinder every 6 months. Most recently, iNavX was updated on November 1, 2026 and Astron Skyfinder on October 22, 2026.

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