The Android version of this email application suffers from a major usability issue: folders and subfolders cannot be collapsed.

While this may be acceptable for casual users, it becomes a serious problem in professional environments. In customer management and other business-related use cases, it is common to have several hundred folders and subfolders. Because the entire folder structure remains permanently expanded, navigation becomes cluttered, inefficient, and unnecessarily time-consuming. For users managing complex mailbox structures, the app is practically unusable.

Another significant drawback is the way contacts are accessed. Contacts are not available through a separate menu or dedicated section; instead, they must be opened from within the email application itself. As a result, users must scroll through the entire folder hierarchy to reach the final menu item, "Contacts." With hundreds of folders and subfolders, this becomes extremely frustrating and inefficient.

It is difficult to understand why such a fundamental feature as collapsing and expanding folders is missing from the Android version. For professional users, this functionality is essential and would significantly improve the overall user experience and productivity.

This would be an excellent add. I just purchased Duo and I love everything except for this. I'm using 25 address, each with many +aliases, along with filters to push mail into dozens of folders and sub-folders. The amount of scrolling required is excessive. Long press or a +/- icon would be cool. Please get this added!

It will significantly improve my user experience

Implement the ability to collapse and expand sub‑folders inside parent folders on the Android Proton Mail app. This functionality, already present on other platforms, helps users keep their mailbox organized and reduces scrolling through long folder trees. Adding a simple tap‑to‑collapse control (or a long‑press menu option) would make folder navigation more efficient and align the Android experience with the desktop and iOS clients.

This is a deal breaker for me. I just signed up for the Plus plan and realised that on Android you can't collapse the folders.

This feature is now possible on Apple devices thanks to the recent update.

Quite essential for a longtime mail user

Yes, please. I have many subfolders and in Android app it is meanwhile confusing