Write a folding sequence that is yours. Set your paper dimensions and front/back colours. Add mountain, valley and guide creases, drag their endpoints, mark fold directions and arrange your steps. Play the sequence to review each diagram and its instructions. Keep independent versions and compare a branch with its saved baseline. Attach a photo of your own finished fold, then share a printable folding PDF or export your pattern data as JSON. Patterns stay on the iPhone. Foldwisp has no sign-in screen and does not carry ads or an advertising identifier. Prefer Chinese as the phone's preferred language and the crease editor switches to Chinese; any other preference keeps that editor in English. The exported JSON records creases and steps only, so a photo of the finished model is left out, and the file cannot be loaded back as a pattern. Words typed in Settings remain on the device until you copy them or pass them through the share sheet.