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Possible Duplicate: Supporting Amazon and Android market links inside application I was wondering if and how you could differentiate between an Amazon App Store installed app and one installed from the Market.

How is an app's position in the Android Market search results determined? Is it as mysterious and complex as Google Web search results? We obviously don't want to change any words in our app's title or description that would hurt our position. Same question applies for not only search results, but when clicking on a Category in the Android Market. How is the order of the list determined? Hopefully someone here can help. I would think that Google would have published some guidelines at least that could help, but I haven't found anything yet.

I tried to update my app on the android market and I got this error : The apk must be signed with the same certificates as the previous version. Since I just had a couple of downloads, I unpublished it and released it with a new package. I made new certificates, keystore, and alias with eclipse and made back ups of the certificate files. I released it and tried to update the new app some days after. I got the same error on the new app. I use advanced mode(multiple apks) in the android market, with 2 apks. This is how I signed the app and update it. Android Tools/Export signed android application. Created a new keystore and a alias and exported it as a apk. The other file, exported I by creating a new keystore and a alias. When I updated this. I did 1, and instead of creating a new keystore i: Use exsisting keystor and alias. I used the same password. Apk nr2: Use the exisiting keystore to the apk 2 and same alias and same password, but still I