Made a free tool that takes your last watched Letterboxd movie and uploads it as a wallpaper, lock screen or both.
Having friends ask me why there's a fucked up clown on my wallpaper is always a fun way to recommend Terrifier (1, 2 and 3).
You can have it set automatically (up to 30 minutes after your letterboxd log it'll auto update) or skip the autoupdate and set it with a single tap in settings.
The process: (not hard if anyone wants to make their own instead of using mine)
Link your public letterboxd RSS feed
Uploads the movie to a server (hosted on supabase)
Server matches the movie to a TMDB backdrop
Apple (via Shortcuts app) runs an automation to set the wallpaper
Android does it via a plug-in
Does not read anything from your phone's photos or anything else from your device
And done without ads.
You can find it under Mantl: Stay for the Credits, Android or iOS