Top iPhone game apps: Clear Vision takes on Flick Home Run

[In this weekly feature, Gamasutra rounds up the week's most popular paid and free iPhone and iPod Touch games, as current on the iTunes App Store.] This week's top paid iPhone game titles on the App Store, as captured on May 21st 2012, are as follows: 1. Angry Birds Space (Rovio, $0.99) 2. Flick Home Run (Infinity Pocket, $0.99) 3. Clear Vision 17+ (FDG Entertainment, $0.99) 4. Cut the Rope (ZeptoLab, $0.99) 5. Fruit Ninja (Halfbrick, $0.99) 6. Where's My Water? (Disney, $0.99) 7. Draw Something (OMGPOP, $0.99) 8. Bejeweled (PopCap, $0.99) 9. Wingsuit Stickman (Robert Szeleney, $0.99) 10. Angry Birds (Rovio, $0.99) FDG Entertainment's sniper sim Clear Vision returns to the iPhone's top ten at third place this week, challenging reigning chart leaders Angry Birds Space and Flick Home Run. Disney's Where's My Water? also reports an increase in sales following this week's launch of a content-expanding update, while Robert Szeleney's Wingsuit Stickman remains a big seller after a strong debut last week. Here are this week's top free iPhone games: 1. PipeRoll (Navigation-Info) 2. 100 Floors (Tobi Apps) 3. Are You Smarter Than A 5th Grader? & Friends Free (Ludia) 4. Logos Quiz Game (AticoD) 5. Feed Me Oil (Chillingo) 6. Line Surfer (Robert Szeleney) 7. MotoHeroz (Ubisoft) 8. Highway Rider (Battery Acid Games) 9. Battleship Free (Electronic Arts) 10. Dragon Story (TeamLava) Navigation-Info's pipe puzzler PipeRoll earns top honors in today's free app rankings, pushing last week's chart winner 100 Floors to second place. Ludia's social trivia app Are You Smarter Than A 5th Grader? & Friends Free remains a popular pick at third place, as RedLynx's MotoHeroz finishes at seventh during a limited-time free download promotion.