KDE Connect is a project to communicate across all your devices. For example, with KDE Connect you can receive your phone notifications on your desktop computer, control music playing on your phone from your desktop, or use your phone as a remote control for your desktop.
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Pros
Pro Open source
Pro Free and easy to work with
Pro Frees one from other parasitic, eternal wallet bleeding software
Good software is written once and well, and then sold with a perpetual license. Happy users are welcome to buy new versions in future years or continue using the one they already bought. Toxic business models feature CEO's explaining the juicy but unwarranted revenue stream they will create with gullible user's wallets by charging monthly/annual fees for software that should have been written once, paid for once. Thanks to KDE we can choose the former and are free to reject the latter.