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Why we created Sherlock

The day wasted waiting in for a delivery. Rushing home to let in a tradesperson, who’s inevitably arrived three hours late. Having to cut keys to give to friends, then attempting keeping track of them.

Wouldn’t it be marvellous if you could safely and securely let people you trust into your home, when you want, without having to be there?

Enter Sherlock. Sherlock is a small box of tricks which lets you and people you trust unlock your building and apartment doors using your phone wherever, whenever. Even if you’re miles from home.

While there are other systems which claim to do something similar, Sherlock is unique. It’s the only solution that unlocks not just one door, but two, works with almost all doors, and doesn’t require you to change your locks.

Sherlock makes entering your home elementary

  • Unlock your doors, wherever you are
  • Let people in, when you’re out
  • Works in apartments, townhouses and walk-ups
  • Use your phone to get you into your home
  • Issue virtual keys to people you trust
  • A fail-safe service, with bank-like levels of security

Sign up for Sherlock

Sherlock is initially offered exclusively to onefinestay hosts. If you’re a host already, and want to find out what Sherlock can do for you, send an email to

onefinestay currently works with homeowners in London, New York, Paris and Los Angeles, but will soon be coming to a city near you. So if you live further afield, or if you are not yet one of our merry band of unhoteliers, join our mailing list to keep track of just when this game is afoot.

Unlocking, made magic

Open your doors. Without your keys

There’s nothing wrong with keys. Indeed, sometimes they can be wonderful objets d’art. The trouble is, you have to be in front of your door to use them. That’s why, with a few taps of your phone, Sherlock can unlock your doors without you having to be there—which also comes in handy should you ever be locked out.

Let people in, when you’re out

Get your life back. Don’t wait in for the cable guy

Staying at home for deliveries, the cleaner or visitors to arrive isn’t just an inconvenience, it’s also a drain on the economy, costing up to $38 billion a year in lost productivity in the US alone. But Sherlock means wherever you are, you can remotely unlock your doors for people you trust, even when you’re not in.

The two-door problem, solved

Two doors unlocked, with just one tap

If, like the vast majority of city dwellers, you live in an apartment or a walk-up, you’ll have two doors to negotiate before entering your home. Thank goodness then, that Sherlock is smart enough to be able to unlock both the building’s door and your apartment door for you, without you needing to change your locks, or anybody else’s.

Electronic keys that can’t be lost or stolen

Because a bunch of keys is a bunch of hassle

The average household has nine sets of keys. Do you know where all of yours are right now? Sherlock will. It lets you quickly send secure, virtual keys to people you trust to use once, or give a permanent virtual key to friends and family. You’ll know when they’re used, you can revoke them at any time, and they can’t be lost or stolen.

Ring ring, not key ring

One thing less to squeeze into your pocket or purse

Sherlock currently works with your iPhone or any Android compatible phone, or though a simple text message. That means you, and those you trust, can use it with a smart – or a less smart – phone. Perfect for grandma.

As safe as, um, houses

With Sherlock, security is everything

We know that security of your home is paramount. That’s why Sherlock has been designed to be safer than Fort Knox wearing a chastity belt. All messages between your phone, your lock and our secure servers use 128-bit SSL encryption or higher.

Discretion guaranteed

You’ll only notice Sherlock when you use him

What makes Sherlock tick is a clever, unobtrusive box, placed close by your apartment door that connects to your entry phone system. From there it can easily and discreetly work its entry magic.

Press coverage

Called Sherlock, the entry system means owners will not have to make copies of keys for friends or guests and avoids the need to sit in waiting for deliveries or repair services as doors can be opened by app or text message.
onefinestay is offering them [potential home hosts] a bit of a carrot — in the form of some cutting edge digital convenience.
I can see how this is really going to appeal to people who want to have a wired home of the future.

Frequently Asked Questions

We have tried to anticipate any and all potential questions you might have about Sherlock. You can read our FAQ answers here.