why does the Samsung tab 3 lite not get the new updates for snapchat?

[AC Question]

So today i checked to see if i could update my Snapchat to see if i could get the new update but it did not work. I updated it every time it needed to be updated and it will not give me the new Snapchat updates. Why does every other Samsung device get the new updates but not the Samsung tab 3 lite.