Smart plug or blood pressure monitor: the right buy depends on your goal
These two products solve completely different problems, so the “best” choice depends on what you actually need at home. The TP-Link Tapo P115 is a smart Wi-Fi plug for controlling and monitoring energy use, while the WAJ upper-arm device is a home blood pressure monitor for health tracking. If you’re torn between them, this comparison will help you decide which one delivers the most value for your situation, budget, and daily routine. There isn’t a universal winner here — but there is a clear winner for each use case.
TP-Link Tapo P115 – Mini Wi-Fi Smart Plug with Energy Monitoring, Schedule On/Off, Energy Saving, Compatible with Alexa and Google Home, White
Medical Blood Pressure Monitors, Upper Arm Large Cuff Blood Pressure Machine for Home Use, Super Large 6.4” LED Display | 2 * 120 Sets Memory | Heart Rate Monitor(White)
Our Recommendation
Product A is the better overall buy because it has a much stronger rating, far more reviews, and a more versatile feature set. The Tapo P115’s energy monitoring, scheduling, and Alexa/Google Home support make it genuinely useful for reducing wasted electricity at home. While it costs £14 more, it offers better real-world confidence and broader day-to-day value. Product B is cheaper, but it is a single-purpose medical device rather than a more flexible home tech solution.
Detailed Comparison
Display
Product B wins on display quality. The WAJ blood pressure monitor has a super large 6.4” LED display, which is specifically designed to make readings easy to see at a glance, especially for older users or anyone checking results in low light. Product A, the TP-Link Tapo P115, does not rely on a large built-in screen because it is a smart plug controlled mainly through the Tapo app and voice assistants. If you want immediate on-device visibility, Product B is far superior.
Performance
Product A wins on performance for its category. The Tapo P115 is built for smart home control, schedule on/off automation, and energy monitoring, and it integrates with Alexa and Google Home. That means it can help reduce wasted electricity by switching appliances off automatically and showing how much power they use over time. Product B performs well for its purpose too, with heart rate monitoring and dual 120-set memory storage, but its performance is focused on one task: measuring blood pressure accurately at home. For automation, connectivity, and energy insight, Product A is the more capable device.
Build quality and design
Product A wins on design versatility, while Product B wins on task-specific usability. The Tapo P115 is a compact mini smart plug in white, so it fits neatly into a socket without taking up much space. It is designed to disappear into the background while quietly doing its job. The WAJ monitor is bulkier because it includes an upper-arm cuff and a large display, but that is appropriate for a medical-style home device. If you want something discreet and modern, Product A has the edge; if you want a dedicated health appliance, Product B is more practical.
Battery life
Product A wins by default on battery life because it is mains-powered through the socket and does not depend on charging cycles. That makes it convenient for continuous use in the home, with no battery anxiety. Product B is also designed for home use and typically runs on batteries or a power source depending on the model, but no battery-life data is provided here, so it is harder to judge. For low-maintenance, always-on operation, Product A is the safer bet.
Price and value for money
Product B wins on upfront value because it is £29.99, which is £14 cheaper than Product A at £43.99. If your only question is which product costs less, the WAJ monitor is the better deal. However, value depends on what you need: the Tapo P115’s 4.7/5 rating from 5,043 reviews suggests stronger real-world satisfaction and more proven reliability, while Product B’s 4.5/5 from 1,517 reviews is still good but less compelling. For smart-home utility, energy monitoring, and automation, Product A may justify its higher price. For a budget-conscious home health purchase, Product B offers more immediate savings.
Features and ecosystem
Product A wins clearly here. The Tapo P115 supports schedule on/off, energy monitoring, energy saving, and compatibility with Alexa and Google Home. Those are genuinely useful features if you want to cut electricity waste, manage standby loads, or automate lamps, heaters, or small appliances. Product B’s feature set is narrower but still useful: upper-arm cuff measurement, large display, memory storage for two users, and heart rate monitoring. For connected-home functionality, Product A is the stronger product; for health monitoring, Product B is purpose-built.
Overall user experience
Product A wins for convenience and everyday usefulness in a connected home. It is especially appealing for UK households trying to keep energy bills under control, since a smart plug can help track and reduce usage on appliances that are left on standby. Product B wins for straightforward health monitoring because the large display and memory function make it easy to use repeatedly at home. If your goal is to improve your home energy management, Product A fits better. If your goal is to monitor blood pressure reliably at home, Product B is the obvious match.
Overall summary: these products are not direct substitutes, so the right choice depends entirely on the problem you are trying to solve. The TP-Link Tapo P115 is the better buy for smart home control, energy monitoring, and long-term convenience. The WAJ blood pressure monitor is the better buy if you need a home health device with a large screen and a lower price. If you want the most proven, broadly useful product overall, Product A takes the win; if you want the cheapest option for medical-style home monitoring, Product B is the better pick.
Buy the TP-Link Tapo P115 if...
Buy Product A if you want to control appliances remotely, automate on/off schedules, or track electricity use in a UK home. It is especially useful for lamps, dehumidifiers, fans, or other plug-in devices where standby waste adds up over time. Choose it if you value smart-home integration and proven reliability over the lowest upfront price.
Buy the Medical Blood Pressure if...
Buy Product B if you need a home blood pressure monitor with a large, easy-to-read display and memory for two users. It is the better choice for routine health tracking, especially if you want a dedicated upper-arm monitor rather than a connected smart device. Choose it if your priority is affordability and medical-style convenience, not home automation.
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