Ring doorbell

[BiscottiToffee]

Can someone please recommend a good doorbell that I can hook up to my smartphone?

I don't need a subscription, just real time would work fine. Ideally so my phone rings to alert me someone is there.

There are also some that you can remote unlock the door.

Any good suggestions for these please?

We bought a wireless eufy one.
No subscription but you can set up alerts to your phone for movement detection or the doorbell ringing. You can then view the camera in real time or it records the events for you to view later.
Paid about £70 from Amazon.

Ring works without a subscription for real time, just not recording. You get alerts too.