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 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


Achim Heynen
43 MB

Requires iOS 9.2 or later. Compatible with iPhone, iPad and iPod touch.


English, French, German, Spanish

Age Rating
In-App Purchases
  1. Vigenere/One Time Pad Cipher R14.99
  2. Advanced Alphabets R14.99
  3. Coordinate Storage R14.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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