Comparison

Map Tools vs NAUTICAL CHART SYMBOLS GUIDE

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

Head to head
About

Map Tools

This app supports numerous coordinate systems and map projections for a wide range of datums. Users can input locations manually or via GPS and view them on an embedded map. All datums are accessible without extra purchases.

Highlights
  • Supports 232 datums
  • Multiple coordinate systems (Geodetic, MGRS, UTM, etc.)
  • Manual location input
  • GPS location acquisition
  • Embedded map view
  • All datums included
Features
Read full description

Map Tools supports coordinate systems and map projections for 232 datums, including WGS84, NAD27, NAD83, ED50, OSGB36, EGSA87, AGD66, AGD84, GDA94, NZGD2000, NZGD1949, and many more. All datums are now accessible in the app without any additional purchases. Users can input locations manually or obtain them using their device's GPS, and these locations can be viewed on the embedded map. The following coordinate systems are available for selection as either the source or target coordinate system: * Geodetic (latitude and longitude) * MGRS * UTM/UPS * USNG * Georef * Map Grid Australia (MGA) with GDA94 Datum * British National Grid with OSGB36 Datum * New Zealand Transverse Mercator 2000 (NZTM2000) * New Zealand Map Grid (NZMG) with NZGD49 Datum * Swiss Grid with CH1903 Datum * Greek Grid with EGSA87 Datum * Singapore TM with SVY21 Datum

About

NAUTICAL CHART SYMBOLS GUIDE

This app provides a comprehensive reference for nautical chart symbols and abbreviations, including international standards and supplementary national symbols. It's designed for learning, revision, and quick lookups with a searchable index and offline access.

Highlights
  • International Hydrographic Organization (IHO) symbols
  • Supplementary US and UK national symbols
  • Fully searchable index
  • Tap & Enlarge feature
  • Offline access
  • Bonus emergency tips
Features
Read full description

SYMBOLS USED ON NAUTICAL CHARTS SPECIFIED BY THE INTERNATIONAL HYDROGRAPHIC ORGANIZATION (IHO), PLUS INTERNATIONAL ABBREVIATIONS AND SUPPLEMENTARY NATIONAL SYMBOLS USED BY THE U.S. AND U.K. HYDROGRAPHIC OFFICES. >>> FULL APP — AD FREE | NO IN-APP PURCHASES | NO SUBSCRIPTION ************ FEATURES and BENEFITS ************ - Perfect for reference, learning & revision - Hi-res graphics - Tap & Enlarge feature for greater detail - Fully searchable index to all the symbols - Always with you on your iPhone or iPad - No internet connection needed ************ LATEST UPDATE INCLUDES ************ * Updated for current iPhone and iOS versions * Save frequently used chart symbols to My Chart Symbols for quicker reference * Jump back to recently viewed pages, with older pages neatly grouped in one menu * Improved favourite and Home controls for clearer, more consistent navigation * Refined layout and spacing throughout the app ************ Plus FREE Bonus Content from "Safe Skipper" ************ "CHART SYMBOLS & ABBREVIATIONS" provides quick reference to the "INT 1" symbols specified by the International Hydrographic Organization (IHO) for use on International marine charts. There are five main sections in this app, each with lettered sub-sections organized into categories to guide users through the hundreds of symbols. The main sections are: GENERAL - chart layouts, positions, distances, directions and compass. TOPOGRAPHY - landmarks, ports and coastal land features. HYDROGRAPHY - tides, currents, depths, nature of the seabed, underwater obstructions, tracks, areas, limits and hydrographic terms. NAVIGATION AIDS & SERVICES - lights, buoys, fog signals, radar, radio, services and small craft facilities. INDEX & ABBREVIATIONS - international abbreviations and index to symbols and abbreviations. SUPPLEMENTARY NATIONAL SYMBOLS Supplementary National Symbols for nautical charts used by the United States and United Kingdom are included at the end of each section. ************* FREE Bonus Content from "Safe Skipper" ***************************** A bonus section has tips on how to deal with emergencies including: Abandon ship; Dismasting; Distress Signals; Engine Failure; Fire Fighting; Flares; Getting a tow; Helicopter rescue; Holed hull; Man overboard; Medical emergency; Mayday; Panpan; Securité. INDEX The index is an A-Z of symbols and abbreviations and enables the user to quickly look up the symbols and see them in context with others in the same categories. This app is based on the United Kingdom Hydrographic Office's print publication "Chart 5011 (INT 1) EDITION 2" Admiralty Charts Publication and "Chart No.1 United States of America Nautical Chart Symbols, Abbreviations and Terms". NOTE: ECDIS symbols used to display Electronic Navigational Chart (ENC) data on Electronic Chart Display and Information Systems (ECDIS) as specified by the IHO are available in our app ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS. We have an ongoing program of marine navigation and boating safety apps, so please contact us with any ideas or features that you would like to see included. Safe boating!

Screenshots

Map Tools4 screens
NAUTICAL CHART SYMBOLS GUIDE4 screens

Verdict

The call

The clearest difference is rating: Map Tools at 5.0 against NAUTICAL CHART SYMBOLS GUIDE's 3.5. Map Tools also leads on update cadence (monthly vs every 80 months). NAUTICAL CHART SYMBOLS GUIDE's advantage is review sentiment (50% vs 21%) and iOS requirement (15.0 vs 18.2). On price, ratings volume, 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

Map Tools costs $1.99 and NAUTICAL CHART SYMBOLS GUIDE $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Map Tools holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews complicate that: 21% of Map Tools's written reviews are positive against 50% of NAUTICAL CHART SYMBOLS GUIDE's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Map Tools ships an update monthly, NAUTICAL CHART SYMBOLS GUIDE every 80 months. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

Scorecard4 real differences · 6 level
Map Tools versus NAUTICAL CHART SYMBOLS GUIDE: the parameters behind the verdict, then further details
ParameterMap ToolsNAUTICAL CHART SYMBOLS GUIDE
Price$1.99$1.99
Rating5.0 (1 ratings) — better3.5 (2 ratings)
Positive reviews21.1% of reviews50.0% of reviews — better
Number of ratings12 — better
Update frequencyMonthly — betterEvery 80 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.215.0 — better
Further details — not scored
Size13 MB41 MB
Age rating4+4+
DeveloperModular Machines LLCThe Other Hat

Customer experience

Map Tools

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews19 reviews
Positive21.1%
Neutral10.5%
Negative68.4%

NAUTICAL CHART SYMBOLS GUIDE

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Map Tools

No in-app purchases

None

NAUTICAL CHART SYMBOLS GUIDE

No in-app purchases

Questions

Is Map Tools free?
Map Tools costs $1.99, with no in-app purchases.
Is NAUTICAL CHART SYMBOLS GUIDE free?
NAUTICAL CHART SYMBOLS GUIDE costs $1.99, with no in-app purchases.
Which has better reviews, Map Tools or NAUTICAL CHART SYMBOLS GUIDE?
Map Tools is rated higher. Map Tools averages 5.0 out of 5 from 1 ratings, while NAUTICAL CHART SYMBOLS GUIDE averages 3.5 from 2 ratings.
Do Map Tools or NAUTICAL CHART SYMBOLS GUIDE have ads?
Neither Map Tools nor NAUTICAL CHART SYMBOLS GUIDE shows ads.
Which is updated more often, Map Tools or NAUTICAL CHART SYMBOLS GUIDE?
Map Tools ships an update monthly, and NAUTICAL CHART SYMBOLS GUIDE every 80 months. Most recently, Map Tools was updated on September 30, 2026 and NAUTICAL CHART SYMBOLS GUIDE on September 29, 2026.

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