Comparison

PRO CHARTS vs AV Assistant

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

Head to head
About

PRO CHARTS

Navigate marine environments with detailed nautical charts and route planning. Track your location, find friends on the water, and share your trip details for safety. Offline chart access ensures reliable navigation even without an internet connection.

Highlights
  • High-resolution NOAA nautical charts
  • Offline chart access
  • Waypoint and route creation
  • Buddy tracking
  • Float plan sharing
  • Point-and-steer navigation
  • Track recording
Features
Read full description

MiraTrex PRO CHARTS™ is a powerful, yet easy-to-use marine navigation system. Whether you’re a fisherman, weekend cruiser, sailor, diver, jet-skier, or an offshore captain needing to find an exact location hundreds of miles offshore, PRO CHARTS™ will get you there and back home safely – with nothing more than your iPhone or iPad. Key Features: • High-resolution NOAA nautical chart coverage with depths for all U.S. coastal areas, the Great Lakes, major U.S. river systems, and Brazil plus global high-level nautical charts. Charts are automatically updated based on NOAA chart corrections. • Easy one-touch Waypoint and Route creation. Pre-plan your routes at home or create them at sea with equal ease. Just touch the screen to create new waypoints and routes. • Find your friends on the water. With our new Buddy-tracking feature, you can see and meet up with your friends while you’re out on the water. If you’re on your secret spot and don’t want to be seen, you can hide your location with the touch of a button. • Stay safe. Easily create and send a Float Plan of your trip to a friend or family member. Your Float Plan and location history can be forwarded to search and rescue personnel in case of an emergency. • Easy point-and-steer navigation. The red heading bug on the large on-screen compass always directs you to the next point on your route. Navigation is as easy as pointing your boat at the heading bug to stay on course. • No Network. No Problem. PRO CHARTS™ is designed so no internet connection is required to view your charts while out on the water. You simply download in advance any charts you’ll need at sea with the touch of a button. • Record your tracks. Track your position in real-time and later view your track history. • Fully indexed point of interest (POI) database including weather, aids to navigation (markers and lights), obstructions, tides, currents, your buddies, and more. Website: www.miratrex.com -------------------- Plans: Base app with limited features - Free 14 day trial of all premium features - Free All premium features (Monthly) - $2.99 All premium features (Annual) - $29.99 (Save 16%, about 2 months free) -Payment will be charged to your iTunes Account at confirmation of purchase. -Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current subscription period. -You will be charged for renewal within 24 hours prior to the end of the current period, for the same duration and at the current subscription rate for that product. -You can manage your subscriptions and turn off auto-renewal by going to your Account Settings in the Apple Settings app after purchase. -No cancellation of the current subscription is allowed during active subscription period. This does not affect your statutory rights. -Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription. -We will be collecting information about your use of the app both when you are online and offline. To find out more please see our privacy policy. -------------------- By purchasing a subscription or downloading an app you agree that you have read and accept our Privacy Policy and Terms of Use. http://www.miratrex.com/procharts/terms-of-use/ http://www.miratrex.com/procharts/privacy/ NOTE: Continued use of GPS running in the background can dramatically decrease battery life. Though PRO CHARTS™ will function without a GPS as a chart reader, a GPS-enabled device is required for point-to-point navigation. Third-party Bluetooth GPS units are available to enable GPS for iOS devices such as WiFi-only iPads that do not include a GPS receiver. For offline use where no Internet connection is available, charts must be pre-cached while still on-line and connected, any charts downloaded while online will be available for offline use.

About

AV Assistant

This app provides U.S. waters navigation information, displaying your location and details of surrounding aids like buoys and lights. It downloads weekly U.S. Coast Guard Light List data and includes relevant Local Notice for Mariners information. It also allows users to report discrepancies in navigation aids to the U.S. Coast Guard.

Highlights
  • Location-based aid display
  • U.S. Coast Guard Light List data
  • Local Notice for Mariners integration
  • Discrepancy reporting to USCG
  • Informational aid for U.S. waters
Features
Read full description

AV Assistant is an informational aid for U.S. waters that shows your location and details on all surrounding aids to navigation (buoys, lights, etc) within your Area of Interest. The app downloads the weekly U.S. Coast Guard Light List for your district, and then shows the aids within your Area of Interest and their details. Any applicable Local Notice for Mariners information is also shown with the light data. For reference use, Nearest Light, also in the App Store, is the better choice. AV Assistant is capable of making reports to the U.S. Coast Guard regarding discrepancies in aids to navigation and is primarily intended for USCG and USCG Auxiliary use. Refer to the website (url in Settings|Reference) for additional information. Warning: AV Assistant, which provides Light List data, is not intended to be used in place of charts or Coast Pilots. Charts should be consulted for the location of all aids to navigation. It may be dangerous to use aids to navigation without reference to charts.

Screenshots

PRO CHARTS4 screens
AV Assistant3 screens

Verdict

The call

The clearest difference is in-app purchases: AV Assistant at none against PRO CHARTS's 4. AV Assistant also leads on rating (5.0 vs 4.5) and iOS requirement (12.4 vs 15.6). PRO CHARTS's advantage is ratings volume (8.5K vs 4). On price, update cadence, 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

Both are free to download. PRO CHARTS sells 4 in-app purchases, starting at $2.99 per month. AV Assistant asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AV Assistant holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: PRO CHARTS has 8.5K ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

Scorecard5 real differences · 5 level
PRO CHARTS versus AV Assistant: the parameters behind the verdict, then further details
ParameterPRO CHARTSAV Assistant
PriceFreeFree
Rating4.5 (8.5K ratings)5.0 (4 ratings) — better
Positive reviews27.1% of reviews—
Number of ratings8.5K — better4
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.4 — better
Further details — not scored
Size48 MB5 MB
Age rating4+4+
DeveloperMiraTrex, Inc.Clint O'Connor

Customer experience

PRO CHARTS

All ratings8,499 ratings
Positive88.3%
Neutral4.1%
Negative7.6%
Written reviews129 reviews
Positive27.1%
Neutral7.8%
Negative65.1%

AV Assistant

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

PRO CHARTS

Reported bugs

3 issues
  • Charts not loading or disappearing
  • Subscription not recognized
  • Login/account issues

Requested features

3 requests
  • Offline map downloads
  • Depth and hazard data
  • Better route planning tools

AV Assistant

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

PRO CHARTS

Subscriptions2
  • 1 Year Auto Renewing Subscription14 Days trial$2.991 Month
  • 1 Year Auto Renewing Subscription14 Days trial$29.991 Year
One-time2
  • Brazil - Nautical Charts$4.99
  • 1 Year Subscription$29.99
None

AV Assistant

No in-app purchases

Questions

Is PRO CHARTS free?
PRO CHARTS is free to download, with in-app purchases available.
Is AV Assistant free?
AV Assistant is free to download, with no in-app purchases.
Which has better reviews, PRO CHARTS or AV Assistant?
AV Assistant is rated higher. PRO CHARTS averages 4.5 out of 5 from 8.5K ratings, while AV Assistant averages 5.0 from 4 ratings.
Do PRO CHARTS or AV Assistant have ads?
Neither PRO CHARTS nor AV Assistant shows ads.
Which is updated more often, PRO CHARTS or AV Assistant?
PRO CHARTS ships an update every 2 months, and AV Assistant every 2 months. Most recently, PRO CHARTS was updated on November 1, 2026 and AV Assistant on October 26, 2026.

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