Calculator SR1 pro is a tools app developed by Alexander Vollmar.
Download Statistics
Calculator SR1 pro has been downloaded 6.2 thousand times. In the last 30 days, the app was downloaded 59 times.
User Ratings
The app has no ratings yet.
App Information
Calculator SR1 pro is FREE to download. The APK download size is 3.80 MB. The latest version available is 1.1.2. The last update was on October 3, 2025.
Technical Requirements
Calculator SR1 pro requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play January 2017.
Description
New! This app is a photorealistic simulation of the "Schulrechner SR1", a pocket calculator made in 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 the "Calculator SR1 pro" you enjoy a completely free version of the app.
The app comprises numerous of frequently used functionalities 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 (Publicly Owned Operation Microelectronics "Wilhelm Pieck" in Mühlhausen / Thuringia). The SR1 was subsidized for students and identically distributed on trade as "MR 609". It was produced from the early 1980s and used in schools since the school year 1984/85. 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 gradian (gon) (GRD) • Logarithmic functions: Natural logarithm (ln) and commomn logarithm (lg), as well as their inverse functions (i.e. power to base e and 10, respectively) • π (Pi) • Memory functions • Exponential representation
Operation notes: • By tapping the display, the displayed value is copied to the clipboard (and is available for further use in other apps). • Swiping from the left edge to the inside, the menu is displayed: Here you can find among other information the settings for the sounds played by the app and the vibration.
The "Calculator SR1" is part of a series of historical pocket calculators: The two others are Calculator MR 610 and Bolek Calculator.
Use the Calculator SR1 pro as your daily tool for all your calculations!
Languages of this app: English, Spanish, French, Italian, Portuguese, German
Get a detailed PDF report for Calculator SR1 pro with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
I purchased this and love it. 4 stars only because it keeps asking me to buy it again. I won't use the calculator that came already loaded on my phone.
★★★★★Bob Chapman· Apr 7, 2018
For a few bucks, I acquired the SR1 pro, the MR 610 pro and the Bole Calculator pro just as a remembrance of the time that I set aside my two-slide rules, and started to use one of the first electronic calculators. These simulated old timers are a hoot to use, and they work just fine. Kudos to you, Alexander.
Google Play Rankings for Calculator SR1 pro
This app is not ranked
Technologies used by Calculator SR1 pro
2 permissions·12 libraries
Subscribe to see full permission and library details
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
