InstaPro is a modified version of the official Instagram app that offers users a number of additional features, such as the ability to download photos and videos, view stories without being seen, and post longer videos. The app is not available on the Google Play Store or the Apple App Store, so users must download it from a third-party website. InstaPro is a popular app among users who want more features from Instagram, but it is important to note that it is not an official app and may not be safe to use.