PaxHelm on your phone.
It installs from the browser, with no app store. It sits on your home screen, opens full screen and is the same PaxHelm as on your computer.
Install

Notifications when they suit you.
Reminders, follow-ups, the daily digest, new mail and finished classifications. Choose which kinds you get and on which days and hours: outside those windows a notification waits for the next one; new mail does not pile up.
On iPhone and iPad, notifications reach the app installed on the home screen (iOS 16.4 or later).
Share to Resources.
On Android, pick PaxHelm in any app's share sheet. On iPhone, use the “Send to PaxHelm” Shortcut, with its own code that you can revoke at any time.
Classification runs on your computer. Without the agent connected, the link waits for it.
Contacts both ways.
PaxHelm's People appear in the Contacts app on iPhone (CardDAV account) and Android (DAVx⁵). An edit on one side reaches the other, with its own app password that you can revoke.
Capture it now. Organise it when it makes sense.
Save a call to make, an idea or a client request on your computer or iPhone. Choose task, idea, note, reminder or follow-up. The due date is optional.