dear god lol are those all down strokes? You should learn strumming patterns
the "stupid app" you were referring to is called a chromatic tuner haha and a free one I prefer downloading is called "Pano Tuner" its really neat! I hear a lot of open strings, what chords are you using? There's a person on YouTube that does full guitar lessons for free and he's amazing at explanations. (Will look up and post when found lol) If you're serious into guitar look into investing in a capo.
Also, any info on what kind of guitar? Manufcaturer? What kind of strings? (Nylon or steel?)
Excuse the paragraph, I'm self taught myself with 2 years of experience under my belt and get all giggity to see a fellow guitarist
