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GCTK has been developed to help you solve the many mystery caches that are available throughout the world. Not all puzzles are that obvious or easy to solve and this app can be of great help to do so!

The developer is a geocacher himself; he knows what problems may arise when trying to solve mystery caches which was the main reason to start development of the app.


The development of GCTK is a continuing process, depending the input/requests of other geocachers who are faced with mystery caches that aren't easy to solve. Anyone can make a request to add a tool into the app. Therefore GCTK will grow bigger and bigger containing more tools.

GCTK can only be downloaded at the Apple appstore.

GCTK : Geocaching Toolkit
About GCTK
150+ tools and decoding tables to help you solve mystery- and multi-caches and make navigational computations, conversions, decodings and text analyses
The number of tools will grow depending your input, so mail us to suggest/request a new tool !

* No additional in-app purchases required
* No additional charge for features/tools that will be added in future versions.


GCTK features:

CONVERSIONS
Base64/Binary/Decimal/Hex to ASCII
Binary/Decimal/Hex/Octal conversions
Celsius, Fahrenheit and Kelvin
D°M'S" conversions
Distances
Roman numbers

NAVIGATION
2 WPs + 2 bearings = new WP
2 WPs + 2 distances = 2 new WPs (Intersections of 2 circles)
3 WPs + 3 distances = new WP (Intersection of 3 circles)
Centroid & surface of triangle
Centroid of circle through any 3 WPs
Coordinatesystem conversions (3800+ systems!)
Crossing lines
Distance, bearing, middle of 2 WPs
Project a new WP
WP/Bearing + WP/Distance = new WP

DECODING: TABLES
A-tom-tom
Alphabet, Gernreich
Alphabet, Latin
ASCII
Baal horizontal
Baal diagonal
Bacon
Brahmi
Chappe
Futurama
Hexahue
HVD code
Illuminati cypher
Mayan numerical coding
Periodical system
Pigpen cyphers (3 x)
Resistor colorcodes
Sign language
Signal flags: maritime
Signal flags: NATO
Signal flags: semaphore
Web- & WingDings
- and approximately 50 more...

DECODING: INTERACTIVE
Braille
Caesar rotation
Cellphone keypad (char to num)
Cellphone keypad (num to char)
Morse
Signlanguage
Vigenère

NUMBERS
Prime numbers
Fibonacci numbers
Pi (decimals)
e (decimals)

TEXT
Frequency analyses
a=1, b=2, a=26, b=25, etc
Count characters
Count words
Hint decrypting

OTHER
Sudoku solver
QR code scanner
Barcode scanner
An overview of the tools
Need support ?
Don't hesitate and contact us at : gctkios@rijkesoftware.com
iPhone/iPad iOS version