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Supports multiple wireless platforms. Loud siren. Cons: Limited integration with other devices. Doesn't support IFTTT. Bulky contact sensors. Bottom Line: The Ring Alarm Security Kit is a DIY home security system that is easy to install and offers affordable professional monitoring, but interoperability with Ring cameras and third party devices is not yet supported.
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Ring's Protect Plus plan goes for $10 per month and doesn't require a contract.
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Motion detection is based on heat signature so the camera can discern the difference between, say, a spinning fan, a small dog, and an actual moving person who's breaking in to your home.