Tapview is a free Android app created by Tapjoy Inc for their advertising partners to preview their custom-made ad creatives. As an advertising preview tool, it allows users to view ads in a native app environment with ease.

With Tapview, users can experience their ad in multiple orientations and on multiple devices. The app simplifies the process of previewing ad creatives, making it as easy as clicking a link.

Overall, Tapview is a useful tool for advertising partners who want to ensure that their ad creatives are optimized for mobile devices. It provides a convenient way to preview ads and ensure that they look great on different devices and orientations.