The Eufy E340 is at its best when paired up to a Homebase, and they're pretty pricey, but cheaper chime units are less than £30. You can just run it through the app though, which works fine. It just ...

Ding, dong! We're on the lookout for the best savings at Amazon's annual summer mega-sale, so you can lock down the very best prices for making your home safer and more secure.