LocalSend
When I was in college, AirDrop was such a convenient tool to use. Our professors who used it would send the class materials to students who shared the same OS. The students in turn would transfer the said files to others using ShareIt.
ShareIt wasn't as fast as AirDrop. As time went by, the app got bad. Really bad.
As an Android user myself, I hated this. Why the heck should I watch an ad before using the app? The app later became an early version of Tiktok, with more ads.
Last year, I found LocalSend. And I couldn't give it enough praise. It's fast. Easy to use. Not to mention it's avaiable on ALL platforms!
If this app existed six years ago, this would be one of the first apps I'd see on all of my devices.