These little foam wedges are the best. They are so easy to use, they are the perfect size, and ylu can clean them to use them multiple times or just pitch them if you don't want to deal with cleaning them.
I can be really forgetful at times and I also usually have my hands full. This leads to me setting my phone done somewhere and forgetting where I put it. This app has always helped me find my phone. It is such a life saver.