Android restricts installing apps from outside the Play Store by default. Go to (or Privacy ).
Proton Mail advises keeping your device updated, using biometric locks, and ensuring you don't root your device, as this compromises the security of the encrypted container. Storage Limitations: The free tier provides 1GB of storage. Download the APK from Uptodown - Proton Mail for Android
A reputable alternative app store that hosts verified Proton Mail APKs. protonmail android apk download
Once you have downloaded the .apk file from a trusted source, follow these steps to install it: 1. Enable "Unknown Sources"
This is highly trusted for maintaining verified, original signatures of apps. Android restricts installing apps from outside the Play
This guide provides a comprehensive walkthrough on how to safely download, install, and update the ProtonMail APK, ensuring your communications remain private from the moment they leave your device. Why Choose the ProtonMail APK Over the Play Store?
As of May 2026, the latest Proton Mail APKs are designed to work smoothly on modern Android versions, with a rewritten backend focusing on reliability. Step-by-Step Guide: Installing the ProtonMail APK Storage Limitations: The free tier provides 1GB of storage
Proton Mail often releases new versions directly on their GitHub page.