Fill and Sign PDF Forms is a free Android app designed for filling and signing PDF documents that contain fillable AcroFields. The app provides a user-friendly interface for accessing and completing form fields, assuming they are correctly labeled. Users can open PDF files directly from their device's file manager or through the app's built-in browser, and can also attach photos to documents. The app supports a split-screen mode for easier filling, depending on screen size, and offers a full-screen read-only preview of forms.

In addition to filling and signing capabilities, the app allows document sharing and viewing. Users can opt for a full version, which removes ads and watermarks, and provides additional features like data export to JSON and access to the app's API for third-party integrations. Note that the app requires a separate installation for signature capture, which is only needed by a small percentage of users. The app is primarily focused on documents with fillable fields, making it essential to verify the compatibility of your PDFs before use.