A note about Sidefari:

With the release of iOS 10, Apple finally added support for dual windows in Safari.
Sidefari was always a way to get this feature (in a limited kind of way)
until Apple released an official means to do it in Safari.

Starting on September 10th, Sidefari won't be available in the App Store anymore.

Thank you to everyone who supported Sidefari during its brief existence.

Please make sure to upgrade to iOS 10 so that you can enjoy a true
dual-browsing experience in Safari.

And if you bought the app already, it will always be
available in your
purchased apps
. Just in case you wish to keep on using it in iOS 9 ;-)