The app is a very nice addition to the infuser. It reminds me to wash the bottle weekly and when to change the cartridge. Couldn’t be happier with the bottle, it is durable, portable, and takes stickers well (it’s a thing).I was excited to get this product because I love 9.5ph Essentia Water and how it makes my cellular level operate at maximum, but Essentia Water is too expensive to maintain for an extended period of time, so I was looking for alternatives. Unfortunately, this test did not show a change in PH with the GoFltr. First glass, was simply tap water from my kitchen faucet. Second glass, was tap water from my faucet into a plastic protein bottle shaker (after all day); third glass, was tap water into the GoFltr stainless container (after all day). I do not see a difference in ph change AND I don't feel any different. I think I got scammed; I wanted this to be real. There is another company on Amazon Invigorated Water Store. The reason I went with GoFltr is the daily reusable filter, as opposed to the Ph-on-the-Go disposable packets. I hope you all get different results, but an 8.0 is no where near the 9.5 Ionized Alkaline Water promised. I'll test it for a couple of days and will repost if there is a positive change.Great value for the money. They always meet or exceed my expectations!