If you want to try on different engagement rings without leaving the house, of course there’s an app for that.
Say Yes! lets you scan your hand using your phone’s camera to try on different types of engagement rings to see what they will look like on your hand.
So if he’s popped the question already and you don’t have a ring, it will let you see what works for your hand and what doesn’t.
If he hasn’t asked yet, it’s probably a good way to drop the hint. Or you can just use it to test out what your hand will look like if you’re engaged.