doc: clarify Gmail app

yaml/degoogle.yml

@@ -466,7 +466,7 @@ web based products:
       text: |
         Jitsi is an open-source secure video conferencing platform. No account is needed to use it, simply enter a Room Name to join or host a meeting. The host is able to kick rogue users from the call. Works directly in your browser, with apps available for iOS and Android. It is not necessary to self-host, but self-hosting is an option for those who wish to. Very low latency and easy to set up. A free public server is available at (https://meet.jit.si) (**5-eyes** server)
   gmail:
-    - title: Gmail
+    - title: Gmail (server-side)
     - notes:
       - This is just for the Gmail service, not a client
     - name: Protonmail
@@ -1087,8 +1087,8 @@ mobile applications:
       eyes: null
       text: |
         Wrapper of Syncthing for Android. Available on F-Droid. Also consider [Syncthing-Fork](https://f-droid.org/en/packages/com.github.catfriend1.syncthingandroid/) which uses a native Android UI rather than the default web UI.
-  gmail:
+  gmail_app:
-    - title: Gmail
+    - title: Gmail (phone app)
     - name: Protonmail
       url: https://protonmail.com/support/knowledge-base/android/
       eyes: null
@@ -1111,11 +1111,16 @@ mobile applications:
       eyes: null
       text: |
         Available from F-Droid.
-    - name: Posteo
+    - name: K-9 Mail
-      url: https://posteo.de/
+      url: https://k9mail.github.io/
-      eyes: 14
+      eyes: null
       text: |
-        Any **open-source mail client** such as: [K-9 Mail](https://k9mail.github.io/) and [FairEmail](https://email.faircode.eu/). Both are available on F-Droid.
+        Available on F-Droid.
+    - name: FairEmail
+      url: https://email.faircode.eu/
+      eyes: null
+      text: |
+        Available on F-Droid.
     - name: Mailbox.org
       url: https://mailbox.org/
       eyes: 14