Hot tubs with wifi and app control
App control lets you turn the heater on from work so the water is at 38 °C when you get home, and turn it down when you go away. It also makes it easy to heat on cheap off-peak electricity.

The roomier foam-wall Lay-Z-Spa.

A foam-wall tub for not much more than a good inflatable.

A square foam-wall tub with a premium price.

Square, insulated and app controlled for about £530.

Drop-stitch walls that stand up like a hard tub.

The biggest Lay-Z-Spa, for 6 to 8 people.

Real water jets on an inflatable.

Square, with water jets and a foot massager.

A thick foam-wall tub that Wave says costs about £2 a day to keep hot.

Square foam-wall Wave for six.

Frame, insulation layer and hydrotherapy jets.

MSpa's top square tub with hydrotherapy and a quiet motor.

Loungers and water jets, but poor reviews.

An oval tub that fits along a wall.

A small smart tub that works with Alexa.

Wood-look Intex with a wireless remote panel.

The cheapest rigid-frame tub on our list.

A frame tub that looks like wood and plugs into a normal socket.

A modular frame tub with a UVC sanitiser.