Tanda Tangan Digital is an Android application that allows users to create digital signatures by simply swiping their fingers across the screen. The app saves the signature as an image file in JPEG or PNG format, which can be viewed directly through the device's built-in gallery app or file manager. The signature image is stored in the TTD_Digital folder, which can be accessed through the app's file manager. Additionally, the app includes a feature that adds the image file name to the Exif data of the image, with "Camera Model" for the name of the signature and "Camera Maker" for the date the signature was created.

The app's features include the ability to change the color of the signature ink and the option to save the image file with a user-defined name. The app requires access to the device's internal or external storage to save the signature image file.

Overall, Tanda Tangan Digital is a straightforward and useful app for anyone who needs to create and save digital signatures on their Android device.