Calculator SR1 pro - Google Play
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Publisher Description
Calculator SR1 pro - A simple calculator for everyday-use!
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
About Calculator SR1 pro
The company that develops Calculator SR1 pro is Alexander Vollmar. The latest version released by its developer is 1.0 .
To install Calculator SR1 pro on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2025-10-03 and was downloaded 0 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Calculator SR1 pro as malware as malware if the download link to de.alexvollmar.sr1_calculator_pro is broken.
How to install Calculator SR1 pro on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the Calculator SR1 pro is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by Calculator SR1 pro will be shown. Click on Accept to continue the process.
- Calculator SR1 pro will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
Program Details
System requirements
Download information
Pricing
Version History
version
posted on 2025-10-03
Disclaimer
Official Google Play Link
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