The most popularly downloaded free iPhone application for the week of October 19 is the strategy-based puzzle game "Fling".

The top free application by country* for the week, by number of downloads, recorded on October 19:

1. US Mobile (photography) Mobile is a free, iPhone version of the widely used photo editing program, Photoshop made by American multimedia software developer, Adobe. Those who are familiar with the in-depth editing tools on the computer-based version of Photoshop may find the iPhone version provides limited editing options. But, after all, it is a free download and has been designed to offer mainstream users with easy-to-use, on-the-go photo editing tools. Mobile enables users to crop, rotate, flip or add special effect filters to their images using gesture-based editing. Photo saturation, tint, exposure, and vibrancy can also be enhanced before photos are uploaded to the included 2GB of free online photo storage available at (sign-up required). The application is only available in the US and Canada App Stores.

2. Germany
Der DUMMHEITSMESSER, das Messgerät für die Intelligenz (entertainment)

Der DUMMHEITSMESSER, das Messgerät für die Intelligenz (translated to "Stupidmeter, test your intelligence" in English) is an application that "calculates" your intelligence. Players are asked to answer questions to determine how intelligent they are. The quiz is based on IQ test-style questions and asks players to think logically and rationally in order to determine the right answer.

3. France
DEBILMETER, le test d'intelligence (entertainment)

See "Der DUMMHEITSMESSER, das Messgerät für die Intelligenz" above.

4. UK
Fling (free) (games)

Fling is a strategy-based puzzle game where users have to plan their gameplay to pass to the next level. In each level cute, furry characters are positioned on the grass-covered game board. Players slide their finger over a character to "fling" it into an adjacent character, pushing it off the edge of the board. To win the game and move onto the next level all but one character must be eliminated from the board. Players can choose from three game modes: free play, arcade or challenge.

5. Canada Mobile (photography)

See " Mobile" above.

6. Australia
Fling (free) (games)

See "Fling (free)" above

7. Japan
????SELECT100 (books)

"Masterpieces of trivia SELECT100" ("????SELECT100" in Japanese) is an application that provides readers with a selection of 100 articles taken from the paid Japanese trivia applications "Masterpieces of trivia" and "Masterpieces of trivia 2". Users can improve their general knowledge by reading individual articles or can search for trivia on a particular topic using the keyword or category search features.

8. Italy
Win For Life (utility)

"Win For Life" is a random number-generating application that can be used to play the popular Italian lottery game, Win For Life. The application can be used to pick ten numbers from any combination of the numbers 1 through to 20. To generate a random combination of ten integers, users simply shake their iPhone. The application also gives users access to the winning lotto numbers from previous draws.

9. Switzerland
Inhale Helium Here (light) (entertainment)

"Inhale Helium Here" transforms your iPhone into a "helium balloon". Users "suck" on their microphone to inhale helium from the balloon on screen. As the air is inhaled, the displayed balloon gets smaller. The user then speaks into the phone's microphone. The application records the user's voice before playing it back as a warped, high-pitched helium-sounding version.

10. Russia
Fling (free) (games)

See "Fling (free)" above

*The countries listed are those markets in which the most iPhones have been sold worldwide. The list of top ten countries is based on AdMob's June estimate of the number of iPhones sold per country since being launched.