Thanks the developer to create this app, it is so cool. A friend of mine recommended it to me, as I am leaning to sing, and it works perfectly for me to visualize the perfect pitch in different displays, patterns and colors. Plus, It's so easy to use. Now, I really enjoy singing and hitting the high notes like Ariana Grande. I won't say a recommend app but I would say a must download app. Looking for new feature of the next version. Love it, great job. 👍🥳