Калькулятор 4 app icon

Калькулятор 4

Simple and functional calculator

rRain · com.rrain.calculator4

Not rated yet 50+ downloads v1.8.3 6.1 MB Android 5.0+ PEGI 3 · Everyone

  • Signature matches the Google Play version Details

At a glance

Latest version
v1.8.3 (25)
Updated
Jun 26, 2026 (3 months ago)
APK size
6.1 MB
Requires
Android 5.0+ (API 21)
CPU support
Any (no native code)
Category
Tools (app)
Listed since
Jun 12, 2023 (at least)
Permissions
3
Developer contact
[email protected]

About this APK

Калькулятор 4 is an app by rRain in the Tools category, listed since at least June 2023. It has no native code, so it runs on any Android processor.

It asks for 3 permissions, none of them sensitive.

What's new in v1.8.3

➤Жестовой ввод функций по зажатию ➤Уменьшено количество кнопок клавиатуры и изменено их расположение ➤Некоторые слова на клавиатуре заменены векторными иконками

Description

From the listing uploaded by “appupdater”.

Simple and functional calculator Highlights parentheses with color Can wrap an expression in parentheses with one click or change the sign Calculates on the go You can write several functions in a row without parentheses, for example lglg10000000000 = 1 NEW in version 1.8.3: ➤Gesting input of clamping functions ➤Reduced number of keyboard buttons and changed their location ➤Some words on the keyboard are replaced with vector icons NEW in version 1.8.2: ➤Minimum supported Android version increased to 5.0 Lollipop ➤No special changes, mostly code refactoring to make it easier to make changes later :) ➤New interface for resizing buttons ➤ Added launch screen ➤ Presets of settings in dialog boxes ➤New design settings ➤History moved to database ➤ Some themes have been improved ➤The result field is now fully clicked NEW in version 1.8.1: ➤More themes ➤Undo Manager completed ➤ The function of wrapping in brackets has been completed ➤Added the function of changing the sign (I'll finish it later) NEW in version 1.8.0: ➤Themes ➤Customizable result format (digit separators and E) ➤UNDO / REDO - undo / redo an action - remembers 100 changes ➤sgn - signum - returns the sign of a number (-1 or 0 or 1) ➤Improved API to 16, now supports android 4.1.1+ IT IS NECESSARY TO DELETE THESE APPLICATIONS to work or uninstall and reinstall ➤Horizontal scrolling response ➤Keyboard text size adjusts to buttons height ➤arc now return degrees if switch = deg ➤Wrap in parentheses button (press several times to place parentheses at a higher level. Press to parenthesize the expression in front of the cursor) ➤Added the ability to erase text by holding down a button ➤Changed expression processing logic: for example now: • √9 (9) = √ (9) × (9) = 27 but √9e = √ (9 × e) • sinπcosπ = (sin (π)) × (cos (π)) but sin2πcosπ = (sin (2 × π)) × (cos (π)) • cos2π = cos (2 × π) • 2 ^ 2e = 2 ^ (2e) but 2 ^ 2lg100 = 2 ^ 2 × lg100 • √lg10000 (1E5) = √ (log (10000)) × (1E5) • lg4! 4 = lg (4!) × 4 • lg4! Lg100 = lg (4!) × lg100 In general, if the function argument is an implicit product (unsigned multiply) of numbers, then all numbers are included in the function argument ••••••••• • 2³! = (2 ^ 3)! • lg100³ = lg100 ^ 3 = (lg100) ^ 3 • lg100³! = (lg100³)! ➤ many more small visual changes and improvements

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Jun 26, 2026.
  • Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.

Store checks and file details

  • Developer signature verified Jun 26, 2026
  • Validated against Google Play Jun 26, 2026
  • Signed byCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
  • Signing certificate (SHA-1)50:FA:E0:A6:0B:8C:06:B3:09:84:25:D3:40:67:76:ED:10:E7:67:6D
  • File MD5b8c95034c99c408e291696cb90540e5e
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (3)

Калькулятор 4 requests 3 permissions, none of them sensitive.

Required hardware & features

Калькулятор 4 APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Калькулятор 4 APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. After downloading, check that the file's MD5 is b8c95034c99c408e291696cb90540e5e.

Tags

More Tools apps