App Deals: iPhone, iPad, Android, WP7

We round up the best free and discounted iPhone, iPad, Android and Windows Phone 7 apps.

iOS

• Sonic & Sega All Stars Racing for free (normally $1.99)
• Sonic Vision: Catch The Blue Blur for free (normally $1.99)
• A+ Flashcards Pro for free (normally $5.49)
• Zip Browser for free (normally $0.99)
• Smile Alarm for free (normally $2.99)
• Sound Scope Space for free (normally $1.99)
• The Fourth Day for free (normally $1.99)
• Sydney Australia Travel Guide for $1.99 (normally $5.49)

iPad Only

• Masque for free (normally $4.49)

Android

Gameloft is selling 22 of its Android titles for 99 cents each; you can see the full list here.

• Calisthenics Watcher for free (normally $1.22)
• Status Notes for $1.00 (normally $2.00)

Windows Phone 7

• ContaSconto for free (normally $0.99)