What each product actually does

Winner: Tie

This is the most important distinction. The Tapo P115 controls any plug-in device up to its rated load and gives you live energy monitoring, schedules, and voice control. The KETOTEK thermostat is purpose-built for electric underfloor heating, replacing or managing a fixed heating controller with an NTC floor sensor. If you need smart control for a heater, dehumidifier, fan, or stand-by loads, the Tapo is the flexible choice. If you need to regulate underfloor heating safely and accurately, the KETOTEK is the relevant product.

Display / screen quality

Winner: KETOTEK

The KETOTEK has a built-in thermostat display, which is essential for heating control because you can see the set temperature, current temperature, and programme status at a glance. That makes it far more suitable for a heating zone in daily use. The Tapo P115 has no screen at all; it is a socket accessory managed through the app and voice assistants. For visibility and on-device control, the thermostat wins clearly.

Performance

Winner: KETOTEK for heating control, Tapo for general smart-plug use

The Tapo P115 performs exactly as a smart plug should: reliable on/off switching, scheduling, and energy monitoring, backed by a very strong 4.7/5 rating from 5,043 reviews. It is ideal for measuring the consumption of appliances and automating them around off-peak times, which can be useful in the UK where electricity prices are still high and time-based usage matters. The KETOTEK’s performance advantage is more specialised: it can directly manage electric underfloor heating, which is a far bigger load and a more temperature-sensitive task than a plug-in appliance. If your goal is to control heating efficiently, the KETOTEK is the better performer because it is designed for that job. If your goal is broad smart-home automation, the Tapo is more dependable and versatile.

Build quality and design

Winner: Tapo P115

TP-Link/Tapo has the stronger reputation here, reflected in the higher rating and much larger review base. The P115 is a compact mini smart plug, so it is easy to fit behind furniture and less likely to block adjacent sockets than bulkier alternatives. KETOTEK’s thermostat is functional rather than elegant, and while it is designed for wall installation, it is a more niche product with fewer signs of mainstream polish. For overall confidence in build and finish, the Tapo looks like the safer premium choice. For purpose-built installation quality in a heating system, the KETOTEK is fit for purpose, but not as universally refined.

Battery life

Winner: Tie

Neither product has a battery, so this category is not really applicable. The Tapo P115 runs from mains power through the socket, and the KETOTEK thermostat is also mains-powered as part of the heating circuit. If you were hoping for portable, battery-backed operation, neither product is designed for that use case.

Price and value for money

Winner: KETOTEK

At £37.99, the KETOTEK is £6 cheaper than the Tapo P115 at £43.99. On raw price alone, that gives the thermostat the edge. However, value depends on use case: the Tapo gives you far broader utility because it can control almost any plug-in appliance and monitor energy use, which may save you money across multiple devices. The KETOTEK is better value only if you specifically need a smart underfloor heating controller; in that scenario, paying less for a dedicated thermostat is sensible. For general household value, the Tapo’s versatility is worth the extra £6.

Game library / features

Winner: Tapo P115

Neither product has a game library, but in terms of features the Tapo is the clear winner. It offers energy monitoring, scheduling, on/off automation, and compatibility with Alexa and Google Home. That makes it useful for tracking standby loads, timing immersion-style appliances, or automatically switching devices during cheaper tariff windows. The KETOTEK’s feature set is narrower but deeper for one job: programmable underfloor heating control, Alexa compatibility, and NTC probe support. If you want the widest feature set, the Tapo wins; if you want the right heating-specific features, the KETOTEK is more specialised.

Overall user experience

Winner: Tapo P115 for most homes, KETOTEK for underfloor heating owners

The Tapo P115 is easier to recommend because it fits more households and more appliances. It is a low-friction way to start measuring and reducing electricity use, especially in the UK where even small efficiency gains can add up over a year. You can use it to identify power-hungry devices, automate schedules, and avoid unnecessary overnight or standby consumption. The KETOTEK delivers a better experience only when you already have electric underfloor heating and need a proper thermostat replacement or upgrade. In that scenario, a smart plug simply cannot do the job safely or correctly.

Overall summary: if you want the better all-round smart-home and energy-monitoring product, buy the Tapo P115. If you specifically need Wi-Fi control for electric underfloor heating, buy the KETOTEK. For most buyers, the Tapo is the smarter purchase because it is more versatile, better reviewed, and easier to justify across multiple uses. For heating-only installations, the KETOTEK is the correct specialist tool.