ReGeX

9 Downloads 21 Views v1.2 1.15 MB 4.1+

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(1.15 MB)

Editor's Overview

ReGeX is a educational game application developed by F-Droid Open Source, packaged as a single Android APK of version 1.2 weighing in at 1.15 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 1.15 MB, so it installs quickly even on modest connections.
This build is signed by "F-Droid Open Source" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Try and find a regular expression (Perl style) to match certain strings, while
not matching others.

Currently there are three game modes, that can be selected and configured from
the settings. These generate Tasks, set limits to how many characters may be
used, and which solutions are successful an which are not.

All game modes are based on the same concept: the Task to solve will be
displayed on the screen as soon as possible (near immediately for Random game,
longer for REDB game), and then the user has to enter a regular expression to
solve the task. As soon as it fits to conditions, it will be automatically
submitted, and the next task will generate - no questions asked. The user will
be notified in case s?he rises up a level.

Details

Version	v1.2
Size	1.15 MB
Developer	F-Droid Open Source
Category	Educational Game
Package	com.phikal.regex
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	9

Frequently Asked Questions

Is ReGeX free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does ReGeX require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is ReGeX safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update ReGeX?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install ReGeX

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.phikal.regex.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «ReGeX» by F-Droid Open Source and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.