I’ve been trying to figure out my comfortable singing range lately to pick songs that fit my voice better, and most random online quizzes felt super vague or inaccurate. I stumbled on a handy [vocal range testing page](https://vocalrangetest.org) that uses mic input to lock in your lowest and highest sung notes directly, no confusing manual note entry required. It helped me nail down my actual range way more precisely than guessing on a piano. Also, as someone still wrapping my head around song key shifts and chord progressions while writing simple tracks, their accompanying interactive [circle of fifths tool](https://vocalrangetest.org/circle-of-fifths) has been such a quick reference. Instead of digging out old textbook charts every time I want to modulate a key or find relative minor keys, I just pull it up to visualize key relationships in one click. It’s totally free with no sign-up hoops, which is a huge plus for casual practice and songwriting.