There's also "smart with a somewhat traditional key" as in http://www.iloq.com. Doesn't talk to your smartphone; actually, doesn't talk at all until a key is inserted. That removes many privacy/security concerns. Open question for me is how easy this is to crack and how reliable it will be (if you have a valid key, will you be able to get in, even after a few years of wear and tear?)
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There's also "smart with a somewhat traditional key" as in http://www.iloq.com. Doesn't talk to your smartphone; actually, doesn't talk at all until a key is inserted. That removes many privacy/security concerns. Open question for me is how easy this is to crack and how reliable it will be (if you have a valid key, will you be able to get in, even after a few years of wear and tear?)