Hi inventors!
I was wondering if it is possible to create OBB files to expand an apk. I think in App Inventor there isn’t this function rightly, are there any external tools to create them? Thanks in advance!
What is OBB? 
or like what
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These two links may help and also answer the OP's question (which is most probably, no you can't use OBB files with AI2)
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OBB files are a very old format and have done their time - and they are no longer secure. Essentially, the Google Android “Bundle” replaces them, and App Inventor should support Bundles in the future, though they are not a necessity.
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