Lockin Coupons and Promo Codes

Lockin makes smart door locks and connected home security hardware. Its distinguishing technology is palm vein recognition, which reads the vein pattern beneath the skin rather than the surface of a fingerprint — the practical benefit being that it is unaffected by wet, dirty or worn fingertips, which is where ordinary fingerprint readers fail. The company is a brand under Yunding.

Before buying any smart lock, the deciding factor is your door. Lock bodies are not universal: door thickness, the backset, the existing mortice or cylinder type and whether the door is timber, uPVC or composite all determine what will physically fit. Manufacturers publish compatibility guides, and checking yours against one before ordering saves the most common return in this category.

Two other things worth settling up front. Every smart lock has a mechanical or emergency backup — key, external battery contact, or both — and it is worth knowing which yours has before the batteries die. And check what happens if your internet drops: a lock that only opens through an app and a cloud service behaves differently from one that keeps working locally.

A Lockin discount code is worth applying. Any Lockin coupon code we hold is listed at the top of this page.

To use a Lockin discount code:

1. Select Show Code on the offer here. The store opens in a new tab and the Lockin coupon code stays on this page.
2. Add the lock or accessory to your cart at lockin.com.
3. Go to the cart or checkout and find the discount code field.
4. Paste the code, apply it, and confirm the total changed before paying.

Codes may be tied to particular models or carry a minimum spend, and bundles with a gateway or extra accessories are often already discounted.

• Check door compatibility first. Measure thickness and backset and check the lock type against the manufacturer's guide. Ordering the wrong body and returning it is the main cost risk here — no Lockin coupon code offsets that.
• Buy the bundle if you need the gateway. If remote access matters to you, a lock and gateway together usually costs less than adding one later.
• Consider installation. If you are not comfortable fitting a lock, a locksmith's fee is part of the real price.
• Keep a mechanical backup. Not a saving as such, but a lockout call-out costs more than any discount you saved.
• Watch the autumn sale period. Smart home hardware discounts heavily during the major autumn events.

Shipping costs and delivery estimates appear at checkout once your address is entered.

If your lock ships with batteries installed, transport rules for lithium cells can affect carrier options to some destinations. The checkout estimate for your address is the reliable figure.

Return terms are published on Lockin's own site and those apply.

For locks specifically: check compatibility and dry-fit before drilling anything. A lock that has been installed and the door modified is far harder to return than one still in its box, and door alterations are not reversible.