Puzzlehunt Assistant app icon

Puzzlehunt Assistant

Morse, semaphore, substitutions – decode with ease with Puzzlehunt Assistant.

Vašek Potoček · cz.absolutno.sifry

Not rated yet 10K+ downloads v2.3.5 25.1 MB Android 5.0+ PEGI 16 · Medium Maturity

  • Signature matches the Google Play version Details

At a glance

Latest version
v2.3.5 (230501)
Updated
Aug 30, 2026 (1 month ago)
APK size
25.1 MB
Requires
Android 5.0+ (API 21)
CPU support
x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category
Tools (app)
Listed since
Sep 15, 2023 (at least)
Developer contact
[email protected]

About this APK

Puzzlehunt Assistant is an app by Vašek Potoček in the Tools category, listed since at least September 2023. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 2.3.3, the minimum Android version rose from 4.0 to 5.0.

What's new in v2.3.5

Adapted for Google Play's new platform requirements

Description

From the listing uploaded by “appupdater”.

Puzzlehunt Assistant is an application designed to simplify and automate many problems faced in cipher solving and puzzlehunt games. Many common types of ciphers are available, e.g., Morse code, Semaphore, Caesar, Vigenère and related ciphers, letter numbering in various bases, etc. Most of the decipher tools show, besides a plain translation of the code, several variants as well (differing in orientation, mirroring etc.) Extensive reference lists and tables are also available. Since version 2.0 it is possible to use Puzzlehunt Assistant for cipher design as well as solving. Also included are several tools for easing routine tasks accompanying cipher solving – frequency analysis, checkpoint logbook, calendar, and a regular expression search engine. Unique features of the Puzzlehunt Assistant: → Intuitive touch control optimized for both phones and tablets → Graphical signal flag recognition → Fine-tuning of alphabetical ordering (optional inclusion of J, Q, X) → Regexp dictionary search among almost 90000 entries → Automated checkpoint logbook (check-in and check-out time, solution, notes, …) → Complete reference tables (including symbols, signal flag meanings, etc.) → Option to switch localisations (currently en, cs) Puzzlehunt Assistant offers the following tools: – Morse code, reference, variants, transmission via flash light or beeps – Braille, reference – Letter numbering in five radices, Roman numerals, permutations; cyclic counting, ASCII, alphabet fine-tuning – Semaphore, reference, variants – Pigpen ciphers, Polybius square, Multi-tap, variants, Bifid and Trifid ciphers – Signal flags, reference including single flag meanings – Caesar, Atbash, Vigenère, Beaumont, autokey, keyword ciphers, custom translation tables – Transposition ciphers: aligning the input in rectangle or triangle, geometric manipulation (zoom, rotation, shear) – Extensive frequency analysis – letters, digits, symbols, word lengths, initial & final letters, etc., reference table of typical English relative letter counts – Calendar tools, conversions of day numbers in week/month/year, difference, optional reference of Czech and Slovak name days – Checkpoint Logbook, automated check-in and check-out time record, notes – Regular expression dictionary search using spell checker dictionary (download required) Please note that Puzzlehunt Assistant is neither designed nor meant to: – deal with real-world encryption or security issues – display any sort of artificial intelligence including suggestions, prediction, or utility rating – passively display lookup tables, Morse trees etc. – substitute commonly available apps like calculator, web searcher, or OCR – substitute paper in graphical cipher solving

Version history

3 versions are listed, going back to v2.3.3. Since v2.3.4 it requires Android 5.0+.

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Aug 30, 2026.
  • Certificate issued to “Czech Technical University in Prague” This is the certificate of the Google Play version.
  • Same certificate as the 2 other versions checked

Store checks and file details

  • Developer signature verified Aug 30, 2026
  • Validated against Google Play Aug 30, 2026
  • Signed byCN=Vaclav Potocek, OU=Faculty of Nuclear Sciences and Physical Engineering, O=Czech Technical University in Prague, L=Prague, ST=Prague, C=Czech Republic
  • Signing certificate (SHA-1)58:44:BC:76:99:C0:31:4A:93:61:83:B3:91:6E:54:1C:57:1B:57:C7
  • File MD5c556756c8167eb2ce833c11c00c5112e
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Required hardware & features

Puzzlehunt Assistant APK: questions and answers

Is there a version of Puzzlehunt Assistant for older Android phones?

The current version needs Android 5.0 or later. Version 2.3.3 is the newest listed build that installs on Android 4.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 2.3.3 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Puzzlehunt Assistant APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is c556756c8167eb2ce833c11c00c5112e.

Tags

More Tools apps