A free app for Android, by Phedro Quan.

PPT to PDF Converter is an easy-to-use app that allows you to convert PowerPoint presentations (PPT) to PDF in just a few seconds. The app offers an intuitive interface with multiple slide transitions so you can preview your presentation before converting to PDF.

The app supports all major slide layouts including the Title, Left, Right, and Title & Left layouts. After selecting your layout, you can preview your slides and choose which files you want to include. Once you are satisfied with your layout, you can proceed to the next step.

The next step is to select the file type you want to create. For that, you need to select the file format from a list of common formats like PDF, JPG, PNG, GIF, TIFF, EPS, and more.

After selecting the file type, you can preview your file and choose which files you want to include.