Looks like I wandered into another dead AT tech forum. I'll try another discussion site. Need to remember to confine myself to OT stuff here.
Please, do feel free to take your self-righteousness elsewhere.
Both answers provided are cross-platform.
And what's so wring with receiving the reminder on the same phone? It makes sense to me, receive my notifications on the device I carry around with me all the time. What would it matter if set the reminder on my phone or on a browser? I mean, you claim this forum is dead, but you're the one that wants antiquated SMS reminders.
There are also apps like Pushbullet or Airdroid, but I feel like you won't be into those as well. So, just don't let the door hit too hard on the way out. I mean, how helpful did you expect people to remain by insulting them?