VRChat Tracker is an unofficial companion app that lets you manage your VRChat friends, invites and avatars in a convenient way, with multiple sorting options.
See who blocked you or who you blocked in the past.
Browse missed invites.
Check hidden user ranks.
Search for world and users.
Browse user's public avatars.
Get notified when your select friends are online.
Manage your avatar list.
Backup your favorite avatars.
A lot more features planned.
There is an option to support the development by purchasing dark theme withing the app.
Read/write external SD data permission will be prompted if you decide you want to backup your app data into a file so that it does not get lost.
If you have any questions, requests or encountered bugs, feel free to email me at firstname.lastname@example.org.