4.0.0: (1) Updated for Android 8.0, (2) Added question. 3.3.1: Fixed Google Licensing for Android 5.0 (Lollipop). 3.3.0: Updated text and index. 3.2.1: Use SHA1 signing algorithm for Google Play. 3.2.0: Added 2 new questions. 3.1.1: Add images. 3.1.0: (1) Added 4 new questions, (2) Update text. 3.0.4: (1) Improved tablet support, (2) Updated buttons. 3.0.3: Correct Google Play licensing. 3.0.2: New internal folder structure. 3.0.1: Fixed email bug.