Calibrating your smart TV doesn't require expensive apps or equipment. The regular settings will work just fine for the vast majority of use cases.
You can check your tyre tread depth in seconds using a coin from your pocket. In the UK, insert a 20p coin into the tread groove. If the outer ring disappears, your tread is above the 1.6mm legal ...
It also shows how many times I unlocked my phone on a given day. You can get the data on a daily or hourly basis. For example, I can select WhatsApp from the list and check the number of notifications ...