Thank you for sharing! I didn't know that they had already come up with such an application. It will be just interesting to check how my sleep has changed with the change of pillow.
I changed my pillow last week. I ordered a model with form memory on https://bedselection.co.uk/best-memory-foam-pillows-for-back-sleepers/. A great website with good tips. My head and neck ached terribly from the previous pillow. Plus, I often woke up.
I believe that with this one, my sleep will become strong and long. I'm already tired of working out my neck every morning, lol.