We've recently told you about Rivet, a free reading-practice app for kids developed by Area 120, Google's experimental product division. Since the software is still in beta phase, it's continuously improving with better features and interface tweaks. The app was initially designed for tablets because they offer a better experience, and couldn't be installed on phones through the Play Store. The APK could still be sideloaded on handsets, though, but the interface didn't look pleasing compared to larger screens. However, the application has just been updated and now officially supports smartphones as well.

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