New Install or Update - Can you tell?

[mediaspree]

I have an app in the app store. I want to release an update. For existing users that download the update I want to set a variable to TRUE. For new users, or first time downloaders of the app the variable would be defaulted to FALSE and can be set to TRUE with an in-app purchase. Is this possible? (the setting of the variable to true unlocks content)

[dapis]

Originally Posted by mediaspree

I have an app in the app store. I want to release an update. For existing users that download the update I want to set a variable to TRUE. For new users, or first time downloaders of the app the variable would be defaulted to FALSE and can be set to TRUE with an in-app purchase. Is this possible? (the setting of the variable to true unlocks content)

I'm not too sure if I understand what you want to do, but I do keep a version flag in my own apps so that the upgrade on its first run knows whether the user is a new one or was the user of a previous version. But if you haven't set anything up in advance, I'm, not sure it's so simple.

But I guess when the upgrade makes its first run it can check to see if some particular data (a setting say) has been changed from its default value, and if so then it knows that this is not the first of the app itself.

[mediaspree]

Originally Posted by dapis

I'm not too sure if I understand what you want to do, but I do keep a version flag in my own apps so that the upgrade on its first run knows whether the user is a new one or was the user of a previous version. But if you haven't set anything up in advance, I'm, not sure it's so simple.

That is pretty much exactly what I want to do but as you say I haven't set anything up in advance.

[baja_yu]

Do you have anything stored in NSUserDefaults that you are certain will exist (be set) in all previous versions of your app?

[ElCorteIngles]

try to do it