It is what it is. – Chalk Screecher Review

It's an app that makes a screechy sound, like chalk on a chalkboard. The sound is less than one second and repeats as you continue dragging your finger on the chalk. You can't pick up your finger or really write anything. If this app let you pick up and then put down your finger, and keep screeching as long as you kept dragging your finger-in other words, if behaved just like a real chalkboard with your finger being the chalk-it'd be almost perfect, and worth paying for. Colored chalk would also be nice. An ancient device was the handheld slate...a mini chalkboard roughly the size of an iPad. Expand this app to mimic that old teaching tool, and you'll really have something!
Review by Dokka Bill on Chalk Screecher.