Casting from your device to Apple TV
8fit can be streamed to your Apple TV (scroll the slider up to find the 'Screen Mirroring' option) or another AirPlay enabled device. Please check this link for an easy guide to setup.
Downloading the 8fit App directly onto your Apple TV
Alternatively, you can download the 8fit app directly onto your Apple TV. Please note, this version does not contain all the features you'll find in the mobile version.
Using an HDMI cable
You can also use a lightning to HDMI cable between your device and your TV.