A smart lock is a device that lets you lock and unlock doors without a traditional key – using a smartphone, PIN code, fingerprint or contactless card.
Our smart lock ranking includes a detailed comparison of the key models available on the Polish market in 2026. This article is aimed at hotel owners, short-term rental operators (Airbnb, Booking), commercial offices as well as houses and apartments – anyone who cares about combining security, convenience and full access control in the smart home era.
What you'll get from this article
- You'll understand how smart locks differ from traditional solutions
- You'll learn the key selection criteria for your type of door
- You'll get a detailed comparison of the best models with concrete specs
- You'll find out how to avoid the most common installation and usage issues
- You'll get recommendations tailored to different budgets and use cases
What are smart door locks
A smart lock is an electronic device mounted on entrance or interior doors that enables authorised access using various methods – with no need to hand over a physical key. Core features include remote unlocking, automatic re-locking, entry history and the ability to share time-limited codes with guests or staff.
The difference between a traditional and a smart lock does not lie in the locking mechanism itself – the euro cylinder or mortise lock can be identical. The difference is the electronics: sensors, communication interfaces (Bluetooth, Wi-Fi), battery power and the ability to manage the lock remotely with a mobile app. A smart lock gives you full control over who enters your home or commercial premises, and when.
Types of available solutions
PIN-code electronic locks – a keypad lets you open doors quickly without any extra devices. You can create one-time or time-limited guest codes, which is ideal for short-term rentals. Biometric locks with a fingerprint reader offer maximum convenience – just touch the reader to lock or unlock the door. Models like TTLock S35B store up to 200 fingerprints, more than enough even for larger hotel properties. Locks with RFID cards and a mobile app combine classic hotel solutions with a modern approach – 13.56 MHz Mifare cards work with dedicated apps, enabling remote control from a smartphone anywhere in the world.Key technologies
Modern locks integrate with popular platforms – Alexa, Google Home, and some competing models also with Apple HomeKit and Apple Home.
Integration with smart home ecosystems means you can control the lock by voice, build automations (e.g. auto-lock when you leave) and monitor door status in the same app alongside other devices in your home.
The most important smart lock selection criteria
Choosing the right lock depends on several key technical factors. A mistake at the purchase stage can mean a return or costly door modifications. Below are the specs you must check before deciding.
Door compatibility
Door thickness is the first thing to verify – SMART-LOCK models (TTLock S35B and TTLock H61B) fit modern doors of any thickness.
Door leaf material matters for installation stability. TTLock S35B is rated as compatible with wooden, steel, aluminium and PVC doors. For heavy doors, make sure the mechanism's locking torque is sufficient.
An operating temperature of -10°C to 55°C and 20–90% humidity (for TTLock S35B) mean the lock can be installed on exterior doors under a covered entrance. IP65 protection class guarantees full dust and water resistance – critical for properties exposed to the elements.
Access methods and memory capacity
Comparing user storage capacity shows the scale of possible applications:
| Model | Fingerprints | PIN codes | RFID cards |
|---|---|---|---|
| TTLock S35B | 200 | 150 | 200 |
| TTLock H61B | 200 | 150 | 200 |
Both models keep emergency mechanical key access – if the batteries die or the electronics fail, you can always open the door with a traditional key. That's a critical safeguard some competing solutions lack.
Power and battery life
Standard AA batteries (four cells, 6V) for TTLock S35B and AAA batteries for TTLock H61B are the format used across the SMART-LOCK catalogue. The advantage is that batteries are available in any shop and you don't depend on chargers. Competing models with a built-in accumulator (like Yale Linus L2 or Tedee PRO) require regular USB-C charging.
Around 10,000 cycles per battery set is the practical life of TTLock S35B. Under typical home use (10–20 openings per day) that's 1–2 years without a swap. In hotel properties with heavy traffic, replacement may be needed every few months.
Low-battery indicators (alarm below 4.8V) and app push notifications make sure you're never caught out. Some models also offer emergency power via USB – just plug in a power bank.
Detailed comparison of the best 2026 models
The ranking below is based on the experience of 10,000+ satisfied SMART-LOCK customers and a detailed analysis of technical parameters. We compare SMART-LOCK products with the strongest competition available on the Polish and European market.
Leading smart lock comparison table
| Model | Approx. price | Access methods | Capacity | IP class | Use case |
|---|---|---|---|---|---|
| TTLock S35B | ~PLN 1,200 | App, PIN, fingerprint, card, key | 200/150/200 | IP65 | Hotels, offices, rentals |
| TTLock H61B | ~PLN 900–1,200 | App, PIN, fingerprint, card, key | 200/150/200 | High resistance | Apartments, homes, offices |
| Nuki Smart Lock Pro | ~PLN 1,200–1,400 | App, PIN (keypad), BT/WiFi | ~200 users | No data | Apartments, rentals |
| Yale Linus L2 | ~PLN 1,000–1,300 | App, PIN (optional), WiFi/BT | ~100 codes | Standard | Homes, Apple Home |
| Tedee PRO | ~PLN 850–1,100 | App, knob, keypad (optional) | ~100+ | Indoor | Apartments, design |
Competitor analysis
Nuki Smart Lock Pro (around €269, or PLN 1,200–1,400) is a great retrofit choice – it mounts onto an existing cylinder with no drilling or cylinder replacement. The Pro version has built-in Wi-Fi and supports modern Thread/Matter standards. However, users report battery-life issues under heavy Wi-Fi use and higher running costs. Nuki Smart Lock fits apartments and short-term rentals well, but for commercial use it lacks environmental resistance. Yale Linus L2 is a well-known brand's product with an elegant design and a silent motor. It supports Apple Home and Matter, which makes it attractive for Apple ecosystem users. Downsides? No built-in biometrics on the base model – a fingerprint reader requires a separate keypad. Limited service availability in Poland can also be a problem in case of faults. Tedee (Polish brand) offers a minimalist compact-knob design and local manufacturing. Tedee PRO runs on a built-in 3000 mAh accumulator with a 6–10 month runtime. However, the model is intended mainly for indoor use, which limits use on exterior doors. A bridge for remote access is sold separately, which increases the total cost of the solution.The most common challenges and solutions
Analysis of service tickets from 7 SMART-LOCK branches identified the most frequent user issues and effective solutions.
Calibration and installation problems
Incorrect installation is the most common cause of trouble with smart locks. A wrong centre distance (72 or 92 mm), the wrong door thickness or a poorly matched cylinder can prevent even the best device from working properly.
Solution: Professional installation by certified SMART-LOCK technicians eliminates the risk of mistakes. We offer a free pre-purchase consultation – send a photo of your existing lock and door via the contact form and we'll recommend the best model.Power and battery failures
Dead batteries are the second most common service reason – especially in high-traffic properties or when the user ignores the app's warnings.
Solution: The TTLock app monitors battery level in real time and sends push notifications to your smartphone well in advance. TTLock S35B signals a low level below 4.8V – that leaves several days to replace the batteries. On top of that, emergency power via a USB port lets you open the door even with completely dead batteries.Integration with existing systems
Connecting a smart lock with access control systems, hotel PMS or smart home automations may require additional configuration.
Solution: SMART-LOCK's technical support includes help with integrating popular platforms. For hotels and commercial facilities we offer dedicated solutions with an API for booking synchronisation – automatic code generation for Airbnb or Booking guests.Summary and recommendations
TTLock S35B and TTLock H61B are the optimal choices for different use cases in 2026. S35B works best in hotels, offices and commercial properties thanks to top-tier resistance (IP65) and a full set of access methods. Immediate next steps:1. Take a photo of your current lock and send it for a consultation
2. Choose a model matched to your needs – S35B for business, H61B for home
3. Book a professional installation with certified technicians
If you're interested in solutions for the hospitality industry, short-term rentals (Airbnb, Booking) or comprehensive access control systems – the full SMART-LOCK catalogue also includes electronic handles, card-based hotel locks, Wi-Fi locks and fingerprint handles. Check out the related guides too: pros and cons of smart locks and 9 things to check before you buy.
