Calculator SR1 pro app analytics for November 10

This app is a photorealistic simulation of the "Schulrechner SR1", a pocket calculator made in the GDR (German Democratic Republic / East Germany). Compared to the original calculator only the frames around the entire device and around the display were reduced for reasons of space. With "Calculator SR1 pro" you get an ad-free version of the app. The app comprises numerous frequently used functions and obeys the order of operations. The keys give optical (key color), acoustic (key sounds) and haptic (vibration of the device) feedback. Furthermore, the back and an interior view of the original calculator can be displayed (completely without function 😀). The "Schulrechner SR1" was a pocket calculator with a liquid crystal display (LCD), which was manufactured by VEB Mikroelektronik "Wilhelm Pieck" Mühlhausen (a "publicly owned enterprise" for microelectronics in Mühlhausen / Thuringia). The SR1 was subsidized for students and sold identically in retail as "MR 609". It was produced from the early 1980s and used in schools from the 1984/85 school year. The books for teaching mathematics in the GDR referred to this calculator. Features: • Basic arithmetic operations: Addition, subtraction, multiplication, division and the calculation of powers (the order of operations is observed!) • Root, square, percent and reciprocal functions • Trigonometric functions: sine (sin), cosine (cos), tangent (tan), as well as the corresponding inverse functions arcsine (arcsin), arccosine (arccos) and arctangent (arctan); angles can be entered in degrees (DEG), radians (RAD) or gradians/gon (GRD) • Logarithmic functions: Natural logarithm (ln) and common logarithm (lg), as well as their inverse functions (i.e. powers of base e and 10, respectively) • π (Pi) • Memory functions • Exponential representation Usage notes: • By tapping the display, the displayed value is copied to the clipboard (and is available for further use in other apps). • The menu button of the calculator opens the menu: Here you can find, among other things, information and the settings for the sounds played by the app, the vibration and the language. Whether as an everyday tool or out of nostalgia for the GDR: use the "Calculator SR1" for all your calculations! The "Calculator SR1" is part of a series of historical pocket calculators: The other two are "Calculator MR 610" and "Bolek Calculator". We are always delighted to receive positive ratings and reviews! Languages of this app: Czech, Dutch, English, French, German, Hungarian, Italian, Polish, Portuguese, Romanian, Spanish, Swedish, Ukrainian