Addalock Portable Door Lock Review (2026)
Updated March 2026 · Tested by Silent Security
The Addalock is a portable deadbolt alternative that works on any inward-opening door. You slide the metal claw into the strike plate gap, close the door, and push the red stopper tight against the inside surface. The door cannot be opened from the outside — not with a key card, not with a master key, not with the original deadbolt unlocked. It takes 5 seconds to install and 2 seconds to remove.
Who Needs This
Hotel travelers: Hotel staff, maintenance workers, and previous guests with copied key cards can enter your room at any time. The Addalock stops all of them.
Airbnb guests: You don't know who else has a key to the property. Previous guests, cleaning crews, the host — any of them could have access. The Addalock gives you a physical barrier you control.
Dorm residents: RAs and maintenance have master keys. Roommate situations can change. The Addalock adds privacy you can't get from the standard dorm lock.
Anyone in a temporary living situation: Subletting, staying with someone you don't fully trust, or living somewhere with unreliable locks.
How It Works
The device has two parts: a metal claw that inserts into the strike plate (the rectangular hole in the door frame where the latch sits), and a red stopper that wedges against the closed door. When both are engaged, the door physically cannot swing open. The mechanism is entirely mechanical — no batteries, no electronics, nothing to fail.
Limitations
The Addalock only works on inward-opening doors. If your door opens outward (common in some European hotels and fire-exit doors), the claw cannot engage the strike plate. It also requires a standard door gap — doors with no visible strike plate or unusual frame construction won't work. It is a supplemental tool, not a replacement for a proper deadbolt with 3-inch screws on a permanent residence.
Pros
- Works on most inward-opening doors immediately
- No tools, no installation, no door modifications
- Blocks entry even when the real lock is unlocked
- Metal construction — durable and reliable
- TSA-friendly for carry-on luggage
- Under $25 — trivial cost for meaningful security
- Fits in a pocket, purse, or laptop bag
Cons
- Only works on inward-opening doors
- Requires a standard strike plate gap (not universal)
- Does not work on sliding doors or pocket doors
- Not a deadbolt replacement — supplemental only
- Can slip on worn or non-standard door frames
- Secures one door at a time
Detailed Ratings
Company Background & Trust
The Addalock is a simple, mechanical device from a small company with no controversies. Our 4.2/5 reflects strong portability and ease of use, tempered by the inherent limitations of the design (inward-opening doors only, supplemental security only). For travelers, it earns its rating as a low-cost, high-value addition to any go-bag.
Frequently Asked Questions
Does the Addalock work on hotel doors?
Yes — it works on most hotel doors that open inward. The metal claw inserts into the strike plate, and even key cards and master keys cannot open the door from outside.
Can it replace a deadbolt?
No. It's a supplemental tool for situations where you can't install a deadbolt — hotels, rentals, dorms, travel.
Does it work on outward-opening doors?
No. Only inward-opening doors. Check your door direction before purchasing.
Is it TSA approved?
Yes. Small metal device, no blades or prohibited components. Passes TSA screening without issues.