30-Second Verdict
| My rating | 8.2/10 |
| Amazon UK rating | 3.9/5 (55+ reviews) |
| Price on Amazon UK | ~£45-50 (PKR 16,578) |
| Discount code | welock40 (saves £40 on official site) |
| No drilling? | ✅ Yes |
| Best for | Internal doors, home offices, bedrooms, porches |
| Not for | UK Oval Cylinders, main front door without porch |
If you are looking for a WELOCK Smart Lock Review UK that tells you the truth, read on. I have tested this lock and compared it to Yale, Nuki, and Ultraloq. Here is my experience.
Why I Wrote This WELOCK Smart Lock Review UK
Over 250,000 home burglaries happen in England and Wales every year. That is not a small number. Locks are the first line of defence. But keys can be lost, stolen, or copied. I have lost my keys three times in one month. The last time, a locksmith charged me £120 to open my flat door.
That is when I started looking for smart locks. I came across the WELOCK Smart Lock SECBN51. It promised fingerprint access, no drilling, and easy installation. I bought one. I tested it on my home office door. Here is my honest WELOCK Smart Lock Review UK — no fluff, no sponsored nonsense, just real experience.
First Things First — Will This Lock Fit Your Door?
Before you buy, check your door. The WELOCK Smart Lock Review UK I read before buying missed this warning. I will not.
| Door Type | Compatible? |
|---|---|
| European Standard Lock Cylinder | ✅ Yes |
| UK Oval Cylinder | ❌ No |
| Knob Cylinder | ❌ No |
| Swiss Round Cylinder | ❌ No |
| Door thickness 30-70mm | ✅ Yes |
The cylinder hole must be 40mm from the door frame. Measure before you buy. If you have a standard UPVC door with a euro cylinder, you are fine. If you have an old UK oval cylinder, this lock will not fit.
I installed mine on a wooden internal door. No issues.
What Is in the Box?
When you open the box, you get:
| Item | Quantity |
|---|---|
| WELOCK Fingerprint Smart Lock | 1 |
| RFID cards | 3 |
| Special Allen key | 1 |
| Lock cylinder extension + screw | 1 |
| Small Phillips screwdriver | 1 |
| Thimble | 1 |
| Small fixing screws | 4 |
| Silicone plugs | 2 |
| Small storage box (for screws and tools) | 1 |
| Instruction manuals (English, French, Italian, German, Spanish) | 5 |
Everything you need is inside. You do not need to buy extra tools. This is a proper DIY kit.
Installation — Can a UK Renter Do It?
Yes. No drilling. No permanent changes.
I installed mine in around 10 minutes. Here is how:
| Step | What to Do |
|---|---|
| 1 | Remove your existing handle (keep it safe for when you move out) |
| 2 | Adjust the lock length using the hex key and extension |
| 3 | Install 3x AAA batteries (good quality ones last 8-10 months) |
| 4 | Add admin fingerprint before installing (critical — remove default fingerprint) |
| 5 | Mount the lock on the door |
| 6 | Test with fingerprint, RFID card, and app |
The lock is easy to install. No drilling. No cutting. When you move out, you can put the old handle back in 10 minutes. Your deposit is safe.
For UK renters reading this WELOCK Smart Lock Review UK, the installation is landlord-friendly. No one will know you changed the lock.
Fingerprint Performance — 0.5 Seconds, 98% Accuracy
The fingerprint reader is fast. Place your finger on the sensor. The door unlocks in 0.5 seconds.
WELOCK claims 98% accuracy. In my testing, it worked 9 out of 10 times. The only failures happened when my finger was wet or dirty, same as any phone fingerprint sensor.
The lock can store:
| User Type | Max Capacity |
|---|---|
| Admin fingerprints | 3 |
| Total fingerprints | 100 |
| RFID cards | 20 |
Setting up fingerprints is simple. Press the SET/WAKE UP button for 5 seconds. Register your print. Admins have to verify before adding new users.
This is one of the best features of this WELOCK Smart Lock Review UK experience. No keys. No codes. Just your finger.
4 Ways to Unlock
| Method | How It Works | Best For |
|---|---|---|
| Fingerprint | Place finger on sensor, twist handle | Daily use |
| RFID card | Tap card on reader | Guest access |
| Bluetooth app | Free app for Android/iOS | Remote unlock (within 10ft) |
| Power bank emergency | Micro USB port hidden under rubber cover | Battery dead situation |
I mostly use the fingerprint. For guests or cleaners, I give them an RFID card. No need to register and delete fingerprints.
The app is free. Through the app, you can:
- See who unlocked the door and when
- Manage fingerprints and RFID access
- Unlock the door remotely (Bluetooth only, within 10 feet)
For remote access from anywhere, you need the WELOCK Wifibox (sold separately). Without it, the lock works only within Bluetooth range.
Battery Life and Emergency Backup
The lock runs on 3x AAA batteries. WELOCK claims 8-10 months of battery life based on 10 unlocks per day. I have been using mine for a few weeks. Battery status is still full.
The lock has:
- Battery status indicator on the screen
- Audible alarm when battery is low
- Power bank emergency backup option
If the batteries die completely:
- Pull down the rubber cover where the QR code is
- Plug a portable power bank into the micro USB port
- Use the app to unlock the door
No one can just plug in a power bank and open the door. You need to be a registered user in the app. This is a smart safety feature.
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Weather Resistance and Build Quality
The lock is IP54 weatherproof. This means it is dust and water-resistant. It can handle light rain. But do not mount it on a gate or door fully exposed to heavy rain.
WELOCK says: “suited for internal doors or external doors that have a roof covering like a porch” .
| Use Case | Suitable? |
|---|---|
| Internal door (bedroom, office, cupboard) | ✅ Yes |
| Front door with porch | ✅ Yes |
| Front door fully exposed to rain | ❌ Not recommended |
| Garden gate | ❌ No |
The lock works in temperatures from -10°C to 60°C. UK winters and summers are fine.
The build quality is solid. The handle is black and silver. It looks modern. It does not stick out too far from the door.
WELOCK vs Yale vs Nuki vs Ultraloq — Comparison Table
| Feature | WELOCK SECBN51 | Yale Linus L2 | Nuki 3.0 Pro | Ultraloq Bolt |
|---|---|---|---|---|
| Price (approx) | £159 (with code) | £199 | £199 | £290 |
| Fingerprint | ✅ Yes | ❌ No | ❌ No | ✅ Yes |
| RFID cards | ✅ Yes (3 included) | ❌ No | ❌ No | ❌ No |
| Built-in WiFi | ❌ No (needs Wifibox) | ✅ Yes | ❌ No (needs bridge) | ✅ Yes |
| No drilling | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Battery life | 8-10 months | 6 months | 6 months | 10 months |
| Emergency power | Power bank (micro USB) | 9V battery | Power bank | 9V battery |
| Best for | Budget, internal doors | Renters | Smart home | Security |
If you want a budget-friendly WELOCK Smart Lock Review UK takeaway, here it is: WELOCK is cheaper than Yale, Nuki, and Ultraloq. You lose built-in WiFi and some smart home features. But you get fingerprint and RFID cards at a lower price.
What I Liked (Pros)
- No drilling — Install in 10 minutes. Remove in 10 minutes. The landlord will not know. Deposit safe.
- Fingerprint works fast — 0.5 seconds. 98% accuracy. No more digging for keys.
- RFID cards included — Perfect for guests, cleaners, or kids. No need to register and delete fingerprints.
- Power bank emergency backup — If batteries die, you are not locked out. Plug in a power bank and use the app.
- Affordable — At £159 (with discount code), it is cheaper than Yale, Nuki, and Ultraloq.
- Battery life — 8-10 months on 3x AAA batteries. Longer than many competitors.
- Easy to use — Fingerprint + twist. No complex app setup required for basic use.
- Up to 100 users — 100 fingerprints + 20 RFID cards. Enough for home, office, or small business.
What I Did Not Like (Cons)
- No built-in WiFi — For remote access from anywhere, you need the WELOCK Wifibox (sold separately). This adds to the cost.
- Not for all UK doors — Does not work with UK Oval Cylinders, Knob Cylinders, or Swiss Round Cylinders. Check your door before buying.
- External door limitation — IP54 weatherproof, but not for doors fully exposed to rain. Best for internal or porch-protected doors.
- App is basic — It works. But do not expect Yale or Nuki-level app features. Bluetooth range is about 10 feet.
- Fingerprint can fail — If your finger is wet, dirty, or dry, the sensor may not read it. Same as any phone fingerprint sensor.
- No auto-lock feature — You have to twist the handle to lock—no auto-lock after closing the door.
UK Renters — Should You Buy This?
The WELOCK Smart Lock Review UK for renters depends on where you want to use it.
| If you want to secure… | Verdict |
|---|---|
| Bedroom door | ✅ Yes — perfect |
| Home office door | ✅ Yes — great for privacy |
| Storage cupboard | ✅ Yes — keep kids out |
| Front door (with porch) | ⚠️ Maybe — check weather exposure |
| Front door (fully exposed) | ❌ Not recommended — get a weatherproof lock |
Landlord-friendly? Yes. No drilling. No permanent changes. When you move out, put the old handle back. Your deposit is safe.
Will your landlord know? No. Unless they closely inspect the inside of your door, they will not notice.
Deposit safe? Yes. 10-minute removal. The original lock goes back.
Frequently Asked Questions — UK Renters
Does WELOCK work on UPVC doors?
Yes, if your UPVC door has a European Standard Lock Cylinder. It will not work on UK Oval Cylinders. Measure your cylinder before buying.
Which brand of smart door lock is best?
For the budget, WELOCK is solid. For smart home integration, Nuki is better. For security, Ultraloq Bolt is BHMA certified. This WELOCK Smart Lock Review UK is for people who want fingerprint access without spending £200+.
What is the most reliable smart lock?
Reliability depends on the use case. For external front doors, Yale and Ultraloq are more weather-resistant. For internal doors, WELOCK is reliable.
What do burglars hate the most?
Burglars hate locks that are hard to pick, visible security cameras, and alarms. A smart lock with no keyhole (like a fingerprint lock) cannot be picked. WELOCK has no physical key override — this is a security advantage.
How do I know if my lock conforms to BS3621?
BS3621 is the British Standard for thief-resistant locks. WELOCK does not claim BS 3621 certification. For external front doors, you may want a BS3621 lock for insurance purposes. For internal doors, BS 3621 is not required.
Can I use WELOCK on my front door?
Yes, if your front door has a porch or roof covering. Do not use it on a door fully exposed to UK rain. The lock is IP54, not fully waterproof.
Final Verdict — Worth Buying or Not?
After testing this lock on my home office door, here is my honest WELOCK Smart Lock Review UK bottom line.
Score: 8.2/10
Why 8.2 and not higher?
- No built-in WiFi (need a separate WiFi box)
- Not for all UK door types (check your cylinder)
- Limited weather protection (not for rain-exposed doors)
Why is 8.2 still good?
- Affordable (£159 with discount)
- Fingerprint + RFID + app + key — 4 ways to unlock
- No drilling installation — landlord friendly
- Power bank emergency backup
- 8-10 month battery life
Would I buy it again? Yes, for internal doors or a porch-protected external door.
Would I recommend it to another UK renter? Yes, if you check your door compatibility first. For bedrooms, offices, or cupboards, this lock is excellent. For a fully exposed front door, look at Yale or Ultraloq.
Where to Buy in the UK
Amazon UK is the best place to buy:
| Detail | Info |
|---|---|
| Price | (~£45-50) |
| Rating | 3.9/5 (55+ reviews) |
| ASIN | B0D3KKM5K7 |
Want to save £40? On the WELOCK official website, use the discount code welock40 to get the lock for ~£159.
Disclaimer: I paid for this lock with my own money. No free product. No sponsored content. This WELOCK Smart Lock Review UK is just an honest experience from one UK resident to another.
Last updated: June 2026. Prices and availability subject to change. Check Amazon UK for current pricing.
