Google Play does not provide any official APIs for retrieving metadata. You could however, check the unofficial API at http://code.google.com/p/android-market-api/.
Specifically, take a look at the Wiki page [HowToSearchApps](http://code.google.com/p/android-market-api/wiki/HowToSearchApps). The response to the query contains version information:
{ "app": [ { "rating": "4.642857142857143", "title": "Ruboto IRB", "ratingsCount": 14, "creator": "Jan Berkel", "appType": "APPLICATION", "id": "9089465703133677000", "packageName": "org.jruby.ruboto.irb", "version": "0.1", "versionCode": 1, "creatorId": "\"Jan Berkel\"", "ExtendedInfo": { "category": "Tools", "permissionId": [ ...

Google Play does not provide any official APIs for retrieving metadata. You could however, check the unofficial API at http://code.google.com/p/android-market-api/.
Specifically, take a look at the Wiki page [HowToSearchApps](http://code.google.com/p/android-market-api/wiki/HowToSearchApps). The response to the query contains version information:
{ "app": [ { "rating": "4.642857142857143", "title": "Ruboto IRB", "ratingsCount": 14, "creator": "Jan Berkel", "appType": "APPLICATION", "id": "9089465703133677000", "packageName": "org.jruby.ruboto.irb", "version": "0.1", "versionCode": 1, "creatorId": "\"Jan Berkel\"", "ExtendedInfo": { "category": "Tools", "permissionId": [ ...