So you are serious about conserving water? Pani can help. It is an app smart water monitor that lets you measure water usage in real-time by individual fixture. Pani can be installed on shower heads, toilets, and other fixtures throughout your house easily. Once you connect it to your WiFi network, you will be able to measure water usage right away.
Pani learns about how you use water and gives you custom recommendations through the app. This sensor has max water temperature rating of 140F. It is available for under $70 at this time.[where to get it]