What's New

- when selecting QR/barcode output, keyboard would show up unnecessarily
- added safeguard for incorrect QR/barcodes

App Description

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 or decoding table!

* 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

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 90 more...

DECODING: INTERACTIVE
Braille
ROT-5/13/47 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



UPCOMING FEATURES:

- more and other tools depending your input!

iPhone Screenshots

(click to enlarge)

Geocaching GCTK screenshot 1 Geocaching GCTK screenshot 2 Geocaching GCTK screenshot 3 Geocaching GCTK screenshot 4 Geocaching GCTK screenshot 5

App Changes

  • January 20, 2013 Initial release
  • April 09, 2013 New version 1.3.0
  • November 15, 2013 New version 2.0
  • January 20, 2014 New version 2.0.1
  • February 12, 2014 New version 2.0.2
  • July 13, 2014 New version 2.1
  • October 04, 2014 New version 2.1.1
  • January 24, 2015 New version 2.2
  • March 01, 2015 New version 2.2.1
  • March 28, 2015 New version 2.3
  • May 03, 2015 New version 2.3.1
  • November 18, 2015 New version 2.4
  • December 02, 2015 New version 2.5
  • January 09, 2016 New version 2.6
  • June 23, 2016 New version 2.6.1
  • November 07, 2016 New version 2.7
  • November 15, 2016 New version 2.7.1
  • June 13, 2019 New version 4.0.1
  • June 13, 2019 Price increase: $1.99 -> $2.99
  • June 13, 2019 Price increase: $1.99 -> $2.99
  • June 14, 2019 Price increase: $1.99 -> $2.99
  • June 14, 2019 Price increase: $1.99 -> $2.99
  • June 15, 2019 Price increase: $1.99 -> $2.99
  • June 15, 2019 Price increase: $1.99 -> $2.99
  • June 16, 2019 Price increase: $1.99 -> $2.99
  • January 28, 2020 New version 4.1.1
  • October 27, 2020 New version 4.2
  • October 27, 2020 Price increase: $2.99 -> $3.99
  • August 05, 2021 New version 4.3
  • August 05, 2021 Price increase: $3.99 -> $6.99
  • October 15, 2021 New version 4.4.1
  • October 15, 2021 Price decrease: $6.99 -> $3.99

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