Probo

Download Probo v5.21.2 APK (15 MB). Test your probability skills with this educational quiz app. Safe install guide and FAQs.

Version: 5.21.2 Size: 15 MB Updated: October 27, 2026

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Frequently Asked Questions

Is Probo safe to install? +

Download the APK from a trusted source, scan it with antivirus software, and review the permissions before installing.

What Android version does Probo require? +

The app works on Android 5.0 (Lollipop) and newer, but performance is best on recent versions.

Do I need an internet connection to use Probo? +

Core quizzes work offline; however, optional content updates and some question packs may require internet access.

Can I use Probo on a tablet? +

Yes, the app is optimized for both phones and tablets.

Why does Probo show ads? +

Probo is a free app supported by advertisements; you can remove them only if a paid ad‑free version becomes available.

How do I update Probo to the latest version? +

Download the newest APK from the same trusted source and install it over the existing version; the app will retain your progress.

Is there a way to back up my quiz progress? +

Probo stores progress locally; you can back up the app’s data using Android’s backup tools or third‑party backup apps.

Can I install Probo alongside the Play Store version? +

If a Play Store version exists, installing the APK may overwrite it. Uninstall the Play Store version first if you want to keep only the APK.