Comparison

GPS Trail Map vs Foreign Exchange (FX)

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

Head to head
About

GPS Trail Map

Transform any trail map into a digital GPS guide by adding location pins. Follow your real-time position on the map, whether it's from a photo, website, or PDF. Saved maps are shared globally, with an optional token for extended tracking.

Highlights
  • Convert any map image to a GPS trail map
  • Add geo-location pins for accuracy
  • Source maps from photos, websites, or PDFs
  • Save and share GPS trail maps globally
  • Real-time location tracking on maps
  • In-app purchase for extended tracking tokens
Features
Read full description

Turn any Trail Map into a "GPS Trail Map" and follow your location as you move anywhere on the map. A Trail Map is converted to a GPS Trail Map by adding at least two geo-location “pins” to the map as you walk the trail. Additional pins improve the accuracy of the GPS Trail Map and correct for any artistic ‘errors’ in the Trail Map. Trail Maps used to make a new GPS Trail Map can come from three sources: the iPhone camera, the Photo App and any website image or pdf. Once made, GPS Trail Maps can be saved on a World Map and become available to all users of the app. Expect to see more and more fully functional GPS Trail Maps on the World Map and available for your use. The app requires an inexpensive Token to locate your position on a GPS Trail Map. A Token allows you to follow your location for 12 hours after it is used. The app comes with 5 free Tokens. Additional Tokens can be purchased in a package of 10 Tokens using an In App Purchase. GPS Trail Map uses a least squares fit to position, orient and stretch the map onto GPS coordinates using geo-location pins placed on the map. It then projects your current GPS location onto that map favoring nearby pins with a 1/(r+∆)^3 weighting factor for each pin. Screenshots: 1) GPS Trail Map showing your location and the pins used to position, orient and stretch the Trail Map photo 2) GPS Trail Map constructed from website pdf of Princeton University Campus map. 3) The methods of sourcing a GPS Trail Map 4) GPS Trail Maps stored on the World Map around Princeton, NJ (the home of the app developer). 5) The Trailhead photo used to construct the GPS Trail Map in #1

About

Foreign Exchange (FX)

Read full description

Easily Check Real-Time Exchange Rates! Foreign Exchange provides up-to-date exchange rates for over 150 currencies worldwide, making it an essential tool for travelers, business professionals, and students alike. Key Features: - Real-Time Exchange Rate Updates: Get real-time exchange rate information for major currencies around the globe. - User-Friendly Interface: A simple, intuitive design that anyone can use with ease. - Airplane Mode Support: Calculate with the last updated rates even without an internet connection. Why Choose Foreign Exchange? Accuracy: We provide data from reliable sources. Speed: Quick loading times for instant access to exchange rates. Customization: Save your frequently used currencies as favorites for easy access. Download Foreign Exchange now and simplify your currency conversions!

Screenshots

GPS Trail Map4 screens
Foreign Exchange (FX)3 screens

Verdict

The call

The clearest difference is in-app purchases: Foreign Exchange (FX) at none against GPS Trail Map's 1. Foreign Exchange (FX) also leads on update cadence (every 2 months vs every 6 months). GPS Trail Map's advantage is ads (none vs shown). On price, device support and iOS requirement 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. GPS Trail Map sells 1 one-off in-app purchase. Foreign Exchange (FX) asks for nothing beyond the download.

UpkeepUpdate frequency

GPS Trail Map ships an update every 6 months, Foreign Exchange (FX) every 2 months. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
GPS Trail Map versus Foreign Exchange (FX): the parameters behind the verdict, then further details
ParameterGPS Trail MapForeign Exchange (FX)
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size5 MB28 MB
Age rating17+4+
DeveloperPeter Kramerbyeonghoon seo

In-app purchases

1 purchases

GPS Trail Map

One-time1
  • package of 10 12-hour Tokens$1.99
None

Foreign Exchange (FX)

No in-app purchases

Questions

Is GPS Trail Map free?
GPS Trail Map is free to download, with in-app purchases available.
Is Foreign Exchange (FX) free?
Foreign Exchange (FX) is free to download, with no in-app purchases.
Do GPS Trail Map or Foreign Exchange (FX) have ads?
Foreign Exchange (FX) shows ads; GPS Trail Map does not.
Which is updated more often, GPS Trail Map or Foreign Exchange (FX)?
GPS Trail Map ships an update every 6 months, and Foreign Exchange (FX) every 2 months. Most recently, GPS Trail Map was updated on October 14, 2026 and Foreign Exchange (FX) on October 15, 2026.

Other comparisons