Officially, the only way to remotely trigger your D3500 is with the Snapbridge app.
Unofficially, and if you consider USB-connected to be "remote", you can control some of the functions of your camera using qDSLRDashboard on either your computer or your Android device, tethered via USB cable (to PC) or USB-on-the-go cable (to Android).
The D3xxx line isn't officially supported by qDSLRDashboard, but it reportedly works for some limited functionality, according to this dpreview.com forum post:
If you have a USB-OTG adapter/cable, I recommend the QDSLRDashboard app for PC and mobile. The D3XXX cameras aren't officially supported, but basic functionality works for me. Live View and video recording don't work, but you have full control over the basic camera settings and you can use the built-in bracketing feature. I think it's well worth the $9 for mobile, despite the limitations for our camera.