Everything rated here and the vast majority of power meters transmit via ANT+, allowing them to connect to most bike computer systems, including Garmin.
Most power meters also offer Bluetooth Smart connectivity - a handy tool for connecting to indoor training apps such a Zwift and Trainer Road, or smartphones, as well as for practicalities such as updating power meter software. Most cycling computers also now have Bluetooth connectivity built in.
Our guide on the indoor training apps for cycling compares the best on the market and helps you identify what one you are most suited to. If you are wondering about power meters and turbo trainer compatibility, our page on best smart turbo trainers includes the latest models.
If the current climate means slim pickings on indoor trainers, or finances mean having to choose one or other, you can always bypass the smart trainer altogether and just use a power meter and simple turbo trainer. You'll need a couple of other sensors but can still work out as a much cheaper Zwift set up and you have the bonus of outside use once warmer weather arrives.