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About Hydronium
Hydronium is an app that allows you to connect to Proton Mail on Ubuntu Touch using any email client. It installs and runs the Proton Mail Bridge locally, and provides a friendly UI for configuring the bridge and adding your account(s) to it. Full system access is required to manage the bridge service. Make sure to follow the how-to in the app for correctly configuring your e-mail client.
Supports:
- Regular login.
- Login with 2FA token/TOTP.
- Login with secondary inbox password (supposedly; untested).
Recent Changes
Service now starts on boot. Reinstall the service to activate.
Permissions
- Full System Access
Community Built
This app has been released under the GNU GPL v3 license. It is developed in the open and you can review the source code.
Info
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Published Date
Mar 16, 2026
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Updated Date
Mar 27, 2026
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Current Version
1.0.1
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Total Downloads
124
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Latest Version Downloads
75
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Supported Architectures
arm64, amd64
Links
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Source Code
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Support
Reviews
ChromiumOS-Guy
Reviewed Mar 28, 2026 for version 1.0.1
please figure out how to make split mode work, then it'd be perfect! this is not exactly a bug on youre end but you should clarify that when login in username should always be lowercase letters.