GCTools 4+

The geocaching tool collection

Achim Heynen

Designed for iPad

    • 2.9 • 12 Ratings
    • Free
    • Offers In-App Purchases



GCTools - the geocaching tool collection!

Here you find the tools to get your next multi and mystery caches done easily.

- Target guidance
- Projection of coordinates
- Distance between coordinates
- Intersection of lines
- Intersection of circles
- Intersection of line/circle
- Center of circle
- Coordinate conversion (DMS, DM, D, Lat/Lon, UTM, MGRS, Swiss Grid, Quadtree)
- Saving/loading coordinates (inApp)
- Mapview
- Interface to GoogleMaps, GoogleEarth, OpenMaps, OffMaps, Navigon, TomTom, Pocket Earth and Waze

Ciphers De-/Encoding:
- Affine Cipher
- Alpha Cipher
- Bacon Code
- Baudot Code (CCITT-2)
- Braille Alphabet
- Caesar Cipher (ROT-N), ROT-5, -13, -18, -47
- Finger Alphabet
- Flag Alphabet
- Pigpen/Freemason's Cipher
- Hexahue Code
- Mobile Cipher
- Morse Code
- Puzzle-Code
- Semaphore Alphabet
- Shutter Telegraph
- Tomtom Code
- Vigenere Cipher/One Time Pad
- Custom alphabets
- Saving/loading alphabets (inApp)

Interactive data tables:
- Cross Sum
- Latin/Arabic Numbers
- Maya Numbers
- Resistors
- Periodic system
- Color Alphabet
- Prime Numbers
- PI Digits
- ASCII Code
- Binary Code
- German Police Codes

- Coordinates
- ASCII/Number Systems
- Lengths
- Areas
- Volumes
- Masses
- Angles
- Speeds
- Times
- Pressures
- Temperatures
- Angles
- Number systems
- Data sizes

- Flashlight
- Menu favorites and search

If you find something missing let us know!

If you encounter problems with the app please mail to gctools@onedollarapp.com instead of writing a review here. We cannot contact you that way to find a solution.

What’s New

Version 3.4.5

New in version 3.4.5:
- Fixed a potential crash when opening "Distance between Coordinates"

Version 3.4.4 brings:
- New feature to calculate a specific point between two points (Belongs to "Distance between coordinates")
- French translation!
- Fix of wrong units in map view
- Changed line color for target heading in map view
- Improved input handling for utm and ch1903 coordinates
- Some UI improvements

Ratings and Reviews

2.9 out of 5
12 Ratings

12 Ratings

Jmam1970 ,


Looks good with it had a spot u could leave a note to the person that hide the cache if its missing.

BobKrohn ,

Awesome Tool

What’s with a a “1”??
I find this App an incredible tool for getting values and doing useful calculations. Been using it for years.

Jasonoz007 ,


Can't read the numbers.

App Privacy

The developer, Achim Heynen, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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