Instapaper has seen a huge surge in downloads since the release of Google and ASUS' 7-inch tablet, the Nexus 7. The Nexus 7 has becomes the most popular device for the app, according to Instapaper's internal numbers.

Since the Nexus 7 was released, downloads of the Instapaper app on Google's Play Store have increased by a whopping 600-percent. The app's developers attribute some, but not all, of this increase to the $25 credit Google gives away with the Nexus 7. Downloads paid for with the credit are listed under the codename "grouper", as shown in the chart above.

"Grouper" downloads make up 15.58-percent of all installs, making the Nexus 7 lead the bunch of devices. Instapaper's app developer notes that the Nexus 7's mostly positive reviews are the main driving point behind the device's popularity, as well as the 600-percent surge in downloads.