メモリ電卓 is a tools app by ITOTSUKA with 1,000+ downloads (about 4.7K estimated). +1 installs in the last 7 days. Released Feb 13, 2015. Install growth, rank history, SDKs and ad networks.
From the store listing: “A simple calculator with big buttons and a big display. Calculation results and numerical values can be saved in memory.”