Cheaper CO2 monitoring or premium radon tracking: which should you buy?

Display

Airthings wins on display quality and usability. Its Calm Tech approach is designed to make readings easy to glance at without feeling intrusive, and the View line is known for a cleaner, more premium presentation. SwitchBot’s display is functional and practical, but it is more of a straightforward monitor than a polished lifestyle device. If you want the better-looking screen and a more refined at-a-glance experience, Airthings takes this category.

Performance

This is the most important category, and the winner depends on what you are trying to measure. SwitchBot wins for general indoor air monitoring because it tracks CO2, temperature and humidity, which is exactly what most UK buyers need for bedrooms, home offices and family living spaces. CO2 is a useful proxy for ventilation, especially during winter when windows stay shut and during hay fever season when people avoid opening them. Airthings wins if radon is your priority, because it is specifically built for radon monitoring rather than CO2. For most households, though, CO2 plus humidity gives more immediate day-to-day value, so SwitchBot is the more broadly useful performer.

Build quality and design

Airthings wins here. At £126.44, it is positioned as a more premium product, and the design reflects that with a calmer, more finished look and a stronger sense of being a dedicated environmental monitor. SwitchBot is solid and well-liked, but it feels more utilitarian and budget-conscious. If you want a device that blends in neatly in a living room or hallway and feels like a premium home sensor, Airthings has the edge.

Battery life

SwitchBot wins on practicality, though exact battery performance will depend on settings and whether you add hub-based connectivity. Its simpler Bluetooth-first setup and lower-cost approach generally make it easier to live with for everyday use. Airthings View Radon is also designed for long-term monitoring, but its connected, always-on style and premium feature set make it less compelling if you want the simplest low-maintenance option. For buyers who care about keeping things straightforward, SwitchBot is the easier device to maintain.

Price and value for money

SwitchBot wins decisively. At £55.99, it is £70.45 cheaper than the Airthings, and that is a huge gap for a home monitor. It also has a slightly higher rating, 4.5/5 from 1,006 reviews, versus Airthings at 4.4/5 from 671 reviews, which suggests stronger buyer satisfaction at a much lower price. If you want the best value for general indoor air awareness, SwitchBot is the obvious winner.

Features and ecosystem

Airthings wins on specialist features. The big advantage is radon monitoring, which SwitchBot does not offer. If you live in a property where radon is a genuine concern, especially a ground-floor room, cellar, or a home in a higher-risk UK area, that extra capability is not just a nice-to-have; it can be the deciding factor. SwitchBot wins on everyday features for most people because CO2, humidity and temperature are the readings you will use constantly to judge ventilation, mould risk and room comfort. It is especially useful in damp UK homes where humidity control matters through autumn and winter.

Overall user experience

SwitchBot wins for most buyers because it solves the most common indoor air problems at a much lower price. It is the better fit if you want to improve ventilation, reduce stuffiness in bedrooms, manage condensation, and keep an eye on humidity in a typical UK home. Airthings is the better specialist device, but it is only the right buy if radon monitoring is the main reason you are shopping. In other words, SwitchBot is the better all-rounder, while Airthings is the better niche tool.

Overall summary: if you want the best value and the most useful everyday readings for a typical UK household, buy SwitchBot. If your main concern is radon, especially in a higher-risk property or lower-ground room, buy Airthings instead. For most people searching this comparison, SwitchBot is the smarter purchase because it delivers the core comfort and ventilation data that matters most, for much less money.