You can now use your Alexa enabled device for your contrast showers.
As part of the Tools for contrast showers at contrastshowers.com I have created a simple Alexa skill for your showers.
To get started, place an Alexa enabled device with speakers in your bathroom. The speakers should be loud enough to be heard inside your shower but not too loud that your neighbors complain. You don't need a device with a screen as the audio-only experience is all you need (plus, that's just weird).
After placing the device, connect it to your Amazon account and install the free Alexa Skill (similar to an app) in your account. That's it, after that you can open the Alexa skill by saying: "Alexa, start Contrast Showers".