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- Updated the Android target API to meet current Google Play requirements.
Practice abacus and mental math quickly with no input and adjustable speeds.
Build mental calculation skills with a frictionless practice flow: just watch, compute, and move on—no answer typing required. Perfect for abacus users and equally useful as a general mental-math trainer. # Highlights - No answer input: instant, uninterrupted repeat practice - Wide difficulty & speed control: tune digits, types, and tempo to your level - Contest-like format & audio: practice in a flow similar to real competitions - Dark/Light mode for comfortable focus - Tablet-friendly for immersive large-screen sessions - Presets: save and load your favorite settings instantly # Great for - Abacus/soroban users sharpening mental calculation - Anyone who wants a simple mental-math app for steady daily drills