Folk.

Folk is an on-device acoustic session toolkit. The Notes tab keeps a card list of session notes you create or edit locally: each note can include a photo, a title, multi-line text, and an optional voice memo; saving a new note spends in-app credits. Two starter examples may appear on first launch and behave like your own notes—they are stored in the same local database and can be edited or removed. Acoustic credits can be purchased as consumable packs through Apple In‑App Purchase; your balance stays on the device. Profile shows your balance, opens the Privacy Policy, and links to the credits shop. No user account is required; note content and balance stay on your device as described in the Privacy Policy.