ROT13 Encoder / Decoder app icon

ROT13 Encoder / Decoder

This application is to do ROT13 of a text.

Mawan Agus Nugroho · appinventor.ai_mawan911.Rot13

Not rated yet 1K+ downloads v1.0 3.3 MB Android 2.1+ PEGI 3 · Everyone

Download APK 3.3 MB All versions
  • Signature matches the Google Play version Details

At a glance

Latest version
v1.0 (1)
Updated
Jun 27, 2026 (3 months ago)
APK size
3.3 MB
Requires
Android 2.1+ (API 7)
CPU support
Any (no native code)
Category
Productivity (app)
Listed since
Jan 26, 2021 (at least)
Permissions
4 (1 sensitive)
Website
mawan.net
Developer contact
[email protected]

About this APK

ROT13 Encoder / Decoder is an app by Mawan Agus Nugroho in the Productivity category, listed since at least January 2021. It has no native code, so it runs on any Android processor.

It asks for 4 permissions, 1 of them sensitive: read shared storage.

What's new in v1.0

First release.

Description

From the listing uploaded by “appupdater”.

ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter after it, in the alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome. Because there are 26 letters (2×13) in the basic Latin alphabet, ROT13 is its own inverse; that is, to undo ROT13, the same algorithm is applied, so the same action can be used for encoding and decoding. The algorithm provides virtually no cryptographic security, and is often cited as a canonical example of weak encryption. ROT13 is used in online forums as a means of hiding spoilers, punchlines, puzzle solutions, and offensive materials from the casual glance. ROT13 has inspired a variety of letter and word games on-line, and is frequently mentioned in newsgroup conversations.

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Jun 27, 2026.
  • Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.

Store checks and file details

  • Developer signature verified Jun 27, 2026
  • Validated against Google Play Jun 27, 2026
  • Signed byCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
  • Signing certificate (SHA-1)0A:19:D4:1A:50:30:A6:3B:5E:A3:42:58:55:73:39:2A:A0:B8:2B:90
  • File MD55b3987531231f0b7746c43a190246f49
  • 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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (4)

ROT13 Encoder / Decoder requests 4 permissions, 1 of them sensitive.

Required hardware & features

ROT13 Encoder / Decoder APK: questions and answers

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 ROT13 Encoder / Decoder 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. After downloading, check that the file's MD5 is 5b3987531231f0b7746c43a190246f49.

Tags

appinventor ai_mawan911 rot13 productivity

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