No smartphone is safe from cheap indie games (unless it's a Blackberry). Just as the Steam mobile app goes out of beta, allowing unfortunate impulse purchases from iOS or Android devices, the Humble Indie Bundle has announced its first Android release, available now.
Under the same "pay whatever, support charity" pricing scheme as previous Humble Bundles, the Humble Bundle for Android offers Android versions of Anomaly: Warzone Earth, Osmos, and Edge, with a bonus copy of World of Goo available to anyone who exceeds the average payment.
All of these games are cross-platform, so you get them on your Android phone and Windows, OSX, and Linux. That's a pretty appealing deal for the price of however much you end up paying.