Lumo

Proton

Lumo is an open-source (GPL-3.0-only) Android app by Proton. The APK we host is 89 MB, it needs Android 10 or newer, and it declares 7 permissions.

The file on this page is Lumo 1.2.18-nogms, 88.95 MB, and it installs on Android 10 and newer.

We compared the signing certificate of this build with the certificate recorded the first time me.proton.android.lumo entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.

The manifest inside the APK declares 7 permissions, including access to the microphone and phone state. Android asks you to approve those the first time the app needs them.

Its licence is GPL-3.0-only. We took this build from F-Droid, and the source for this exact version is linked below.

F-Droid, who build and sign this package, flag it: it relies on a network service that is not open source. We pass that on as they recorded it — we have not tested the app ourselves.

We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.

Download APK · 88.95 MB

Version: 1.2.18-nogms
Size: 88.95 MB
Requires Android: API 29
Package: me.proton.android.lumo
Signature checked on: Sep 21, 2026
Where this file came from: F-Droid
Licence: GPL-3.0-only
Source code: Source for this version

File SHA-256: b161760381522ffc61925c8978d633a9644a6a14b8c5f391dd90461251ec5d5f

Signing certificate (SHA-256): a5769b88d3c500f9c58c6939a7b09dc293630c8b93b69f4457888060bf1faa43

We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.