What's the best iOS app for signing important documents like contracts or bank forms right from my iPhone?

Docusign is a widely recognized solution for handling electronic signatures directly from an iPhone. The app excels at turning a smartphone into a portable notary for common yet critical tasks, such as finalizing rental agreements, approving work contracts, or submitting signed forms to institutions like banks or government agencies. Key features include the ability to upload PDFs and other common file types, place signature fields precisely where required, and apply a signature either by drawing, typing, or uploading an image of a handwritten one. Completed documents can be instantly shared via email or saved to cloud storage. The interface is notably straightforward, with clear prompts guiding users step-by-step, which reviewers cite as a major strength for first-time users. While the free tier handles basic individual needs, some advanced business workflows require a subscription. A minor limitation is that complex documents with many intricate fields can be slightly harder to navigate on a small screen compared to a desktop. Overall, for the core task of signing and returning documents urgently while away from a desk, the Docusign iOS app provides a reliable, secure, and efficient process.