You can directly edit, modify, or add text and images within PDF files.

It includes a PDF compressor tool to reduce file sizes without sacrificing quality, which is ideal for sharing.

Many of these tools allow you to work offline without needing an active internet connection.

You can easily combine multiple PDFs into one or split large documents into smaller, manageable files.

The app supports signing, highlighting, underlining, and striking out text, making it effective for filling out forms.

To help me narrow down which specific app you are looking for: