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
- 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 3.4.1

- The coordinate parser has been improved and supports more formats, e.g. the coordinate format used by
- Wrong decimal formatting was fixed for some coordinate types
- TomTom-Code and Bacon-Code support copy & paste for encoded texts
- Better support for larger fonts

Ratings and Reviews

2.7 out of 5
11 Ratings

11 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.


Achim Heynen
41 MB

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


English, German, Spanish

Age Rating
In-App Purchases
  1. Coordinate Storage $0.99
  2. Circle Tools $0.99
  3. Advanced Alphabets $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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