Chorus is an iPhone app that lets users show their friends which applications they’re downloading, and which they recommend. Not only does that help you figure out the next cool app for your iPhone, it also gives Chorus’s maker, Envio, some fun data about the App Store.

Specifically, for the month of February, Envio says its users recommended a web browsing app called Perfect Browser 3 above all others. The most downloaded free app was Luminosity Brain Trainer, which offers exercises that supposedly improve your intelligence. The most downloaded paid app was Where’s my Phone, which helps you find your phone by whistling, then listening for a ringtone in response.

Now, this list comes with the obvious caveat that it only represents a small percentage of iPhone owners. (Envio says that 600,000 users have “invited others to join the Chorus community,” which also raises questions about the degree to which the sample is skewed by self-selection.) But it’s still interesting to look at data that shows what people are not just downloading, but recommending.

You can compare these numbers to the top apps in December.

Top 10 most recommended apps by Chorus users

  1. Luminosity Brain Trainer
  2. LastPlayed+ for Facebook and Twitter
  3. Knocking Live Video
  4. NBC Olympics on AT&T
  5. Evernote
  6. HFOrg
  7. Lose It!
  8. Lexeme Free Scrabble Word Search
  9. Virtual Trainer
  10. Words With Friends

Top 10 free apps based on download attempts

  1. Lumosity Brain Trainer
  2. Classics
  3. Gorillacam
  4. Catch-21
  5. Touch Mouse
  6. Fonolo
  7. Meebo
  8. ICE app
  9. Bell Cowbell app
  10. 3D Sun

Top 10 paid apps based ond ownload attempts

  1. Where is my Phone?
  2. ContactFlow
  3. Alphabetic
  4. MotionX GPS Drive
  5. HourFace
  6. Cogs
  7. Battle Bears: Zombies!
  8. Slug Wars
  9. Slango – Urban Dictionary
  10. AutoRingtone Pro Text to Speech Ringtones