The ROSESELSA Cambrian is a sub-$50 Bluetooth headphone with LDAC, ANC, an app, and battery life that feels ridiculously long in real use. I like it for an everyday carry option with a somewhat flat tuning, reduced upper mids, and good overall definition for the price.
Pros
+Insane battery life (rated 100 hours) and strong real-world endurance
+Supports LDAC and has ANC
+Comfortable for long sessions, even with glasses
+Good definition/technicalities for a $48 Bluetooth headphone
+Includes 3.5mm cable for wired use
Cons
-Plastic tray packaging feels cheap
-Soundstage is on the small side
-Bass speed isn’t the fastest
-Upper mids are reduced (may not suit people who want more vocal bite)