Not enough free questions
I downloaded this app to revise for some very important tests and it was going well and I got all the questions right, but after I finished it, I thought I would be able to do another test but it said that I have done all the free 15 questions and it said that I could buy the full pack for £1.99 and I was pretty annoyed that you can only do one single test that only has 15 questions. Please at least add multiple free tests or more tougher questions.
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