Only the current version so far — new entries appear as the app ships updates.
Calculator, no rounding errors is a tools app by Raiiware with 1,000+ downloads (about 4.8K estimated). +13 installs in the last 7 days. Released May 22, 2016. Install growth, rank history, SDKs and ad networks.
From the store listing: “Accurate, easy-to-use, and no permissions required”