Image signature apps are used for signing electronic contracts and offer the following features:
1. Contract content can be viewed, edited, and signed on multiple platforms.
2. When signing a contract, the front-facing camera and touchscreen record the signer's image, signing gestures, and trajectory, more fully expressing the signer's intent and enhancing the non-repudiation of the signature.
3. The signed document protection mechanism complies with the ETSI-XAdES-T electronic signature standard to protect the document content from tampering.
4. Multiple parties can sign the document, and the signing status can be viewed.