Android Pay was a successor to and built on the base established by Google Wallet which was released in 2011.[16] It also used technology from the carrier-backed Softcard—Google had acquired its intellectual property in February 2015.[9][17] At launch, the service was compatible with 70% of Android devices, and was accepted at over 700,000 merchants.[9] Google Wallet still powered web-based Play Store purchases and some app-based peer-to-peer payments, for instance in Gmail.[9]