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App Store Apps > Reference > GC Wizard
GC Wizard icon

GC Wizard

by Mark Lorenz · Reference · Free
On the App Store since June 2020 · Data updated 2026-10-30
App Store

GC Wizard is made and published by Mark Lorenz. AppBrain is an independent app data site and isn't affiliated with Mark Lorenz. The app name, icon, screenshots and description belong to Mark Lorenz and are shown as published on the App Store.

AppBrain's verdict

Established
Rating on App Store
4.80
5 ratings
Last updated
September 1, 2026

It doesn't have enough ratings yet to judge what users think.

Rankings

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Releases

Updates seen on the App Store
Version
3.7.1
Launched
June 2020

No changelog data

User feedback

Ratings and reviews on the App Store

Comments on GC Wizard for iOS

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Technology

Found in the app by AppBrain
Price
Free
App size
130.2 MB
Content rating
Everyone

Technologies used by GC Wizard

About the app and developer

About GC Wizard

GC Wizard is a reference app developed by Mark Lorenz.

What is the rating of GC Wizard?

GC Wizard is rated 4.80 out of 5 stars, based on 5 ratings.

Is GC Wizard free?

GC Wizard is free. The app size is 130.24 MB. The latest version available is 3.7.1. The last update was on September 1, 2026.

What are the requirements for GC Wizard?

The app has a content rating of Everyone. The app has been available on the App Store since June 2020.

Developer information for Mark Lorenz

Mark Lorenz

Address:

Frequently asked questions about GC Wizard

Is GC Wizard free?

Yes. GC Wizard is free on the App Store.

Is GC Wizard still available?

Yes. GC Wizard is on the App Store, and the last update we saw was on September 1, 2026.

How large is GC Wizard?

GC Wizard is 130.24 MB.

Is GC Wizard suitable for children?

App Store rates the content of GC Wizard as suitable for everyone.

How do people rate GC Wizard?

GC Wizard scores 4.80 out of 5 stars, from 5 ratings on the App Store.

Who made GC Wizard?

GC Wizard was developed by Mark Lorenz. It is listed in the reference category on the App Store.

What are the best alternatives to GC Wizard?

People looking at GC Wizard also look at these reference apps: Puzzle Sidekick, Cipher, Meine 123Fahrschule, Numbers in Croatian language, HM.edu App.

Share GC Wizard

Store listing

By Mark Lorenz, from the App Store
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Screenshots by Mark Lorenz, from the the App Store listing
Description by Mark Lorenz Written by the developer, not by AppBrain. Click to read.
The GC Wizard is an open-source tool collection.

It was originally created to offer Geocachers an offline tool to support them with in-field mysteries and riddles. So, the GC Wizard contains numerous tools for simple cryptography, geographic and scientific calculations as well as hundreds of sets of various symbols.

Meanwhile the project became very huge and might be practicable for many non-Geocaching issues.

General
• Formula Solver: For handling multi stage variables
• Multi Decoder: Enter an unknown code and let several decoders and calculators interpret it in a row
• More than 200 sets of Symbol Tables: Direct decoding symbols to characters; save own encoding as an image
• Online Manual: Every tool has its own manual page

Cryptography & Encodings
• Alphabet Values (A = 1, B = 2, ...): Configurable alphabets with language specific special character handling
• Braille graphical decoder: Type the points into a graphical interface; supports different languages
• Book Cipher: Choose the correct system (e.g. Line + Letter Number or Section + Line + Word Number, ...), handle special characters and empty lines, ...
• Enigma: A full working Enigma simulator incl. numerous possible settings
• Esoteric Languages: Generators and interpretors for several esoteric programming languages like Brainf**k, Ook, Malbolge and Chef
• Morse
• Numeral Words: Lists of important numbers in different languages. For English + German there are parsers to identify even complex numeral words
• Substitution and Vigenère Code Breakers: Try to find the solution without knowing the keys
• Classic Codes: Playfair, Polybios, Railfence, ...
• Historic codes: Caesar, Vigenènere, telegraph codes, ...
• Military codes: ADFGX, Cipher Wheel, Tapir, ...
• Technical encodings: BCD, CCITT, Hashes (incl. brute-force hash breaker), RSA, ...

Coordinates
• High precision coordinate algorithms which support precise calculations even with very long distances by always considering the earth's shape (ellipsoid)
• Support of different ellipsoids, even other planets
• Coordinate Formats: Support of UTM, MGRS, XYZ, SwissGrid, NAC, PlusCode, Geohash, ...
• Waypoint Projection: Includes precise reverse projection
• Open Map: Set own points and lines, measure paths, export as and import from GPX/KML; OpenStreetMap and satellite view
• Variable Coordinate: Interpolate coordinate formulas if some parts of coordinate are not given. Show result on map
• Cross bearing, Center point of two and three coordinates, different intersections of lines and circles, ...

Science and Technology
• Astronomy: Calculate position of sun and moon at a certain place and time
• Color Space Converter: Convert color values between RGB, HSL, Hex, CMYK, ...
• Countries: ISO, calling and vehicle registration codes, flags
• Date and Time functions: Weekday, time differences, ...
• Irrational Numbers: π, φ and e: Show and search up to > 1 Mio. digits
• Number sequences: Factorial, Fibonacci and Co.
• Numeral Systems: Converts decimal to binary, hexadecimal, ...
• Periodic Table of the Elements: Interactive view; lists which order the elements by any criterion
• Phone Keys: Converts classic phone keys to letters. Supports phone model specific behaviours
• Prime Numbers: Search prime numbers up to 1 Mio.
• Segment Display: Graphical interface for decoding and encoding 7 to 16 segment displays
• Unit Converter: Length, Volume, Pressure, Power and many more; convert between common units incl. prefixes like micro and kilo
• Apparent Temperature, Cross Sums, DTMF, Keyboard layouts, Projectiles, Resistor codes, ...

Images and Files
• Hex Viewer
• Exif/Metadata Viewer
• Analyse frames of Animated Images
• Color corrections: Adjust contrast, saturation, edge detection, ...
• Search for Hidden Data or hidden archives
• Read QR/Barcodes from images, create them from binary input
Official page on the App Store
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Overview Alternatives Reviews Rankings Technology
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