Please install my simple Flutter-built cash-counter APK on a real Android phone and put every screen and button through its paces. I care most about usability, so tell me where the flow feels clumsy, confusing, or inconsistent. Key checkpoints • Data must save and reload after closing the app • Totals and sub-totals have to calculate with perfect accuracy • All visible interface elements (icons, buttons, labels, colour states) should behave exactly as their labels suggest Whenever something misbehaves, capture a screenshot, add a quick annotation that shows what went wrong or what could be smoother, and move on. At the end of the session, send me a folder containing: 1. The annotated screenshots for each issue 2. A short text summary that pairs screenshot filenames with a sentence or two describing the problem and any suggestion you have for improving it No coding, special tools, or prior QA background required—just a careful eye and an Android device running a current OS version.