UI unusable
UI is making this app unusable - after entering the "search" field the symbol keyboard covers it. You have to search for nothing, cancel and only then can you start entering your query.
Another thing is lack of support for (X) icon in the search query field - you have to delete your query (however long) manually by deleting one by one.
With those problems fixed however, Id easily give it 5/5 :)
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WolframAlpha Classic