[mantrax4]

Well I'll give you this example.

If Facebook would release 3 Facebook apps, where each has mostly the same features, but slightly different, and on top of that each requires a different user/login, that's definitely fragmentation.

Say, you can argue WhatsApp and Facebook Messenger, or Instagram and Facebook picture posting represent fragmentation for Facebook, as they do mostly the same thing, but are each in their own space and with their own APIs and their own users etc.

Another example. iOS having lots of apps in one App Store is not "app store fragmentation". But Android having many separate app stores, many apps in each being the same (but tweaked or different versions) is "app store fragmentation".