As one of its daily deals, the Amazon Appstore offers SeekDroid for Android for free. That's the lowest price we could find for this anti-theft app by $5. Click here for more information on its security features. Deal ends today.
Springs Electronics via eBay offers the Griffin HELO Touch-Controlled RC Assault Helicopter for iOS or Android in Black, model no. GC30014, for $19.99 with free shipping. That's tied with our mention from last week and the lowest total price we've seen. (It's also a current price low by $10.) This helicopter is controlled with the HELO TC App, which allows you to fly around and launch missiles (six are included) with your iPhone, iPod touch, iPad, or Android device. The included "Flight Deck" plugs into your device's headphone jack and transmits a signal to the helicopter.
Amazon Appstore offers downloads of CastleVille Legends for Kindle with 110 Amazon Coins (a $1.10 value) for free. Assuming you'll spend the coins, that's $1 under what Google Play charges for a version compatible with all Android devices.
Amazon Coins can be redeemed on eligible products in the Amazon Appstore. Note that promotional coins will expire on the last day of the month one year after they were acquired.
Google Play offers downloads of Towelfight 2: The Monocle of Destiny for Android for free. That's $1 under our March mention (for Mac) and the lowest total price we could find by $1. Help Hardik and his pet pug Bella through uncharted territory using only Hardik's monocle to guide him.