OpenCalc

Simple and beautiful calculator for Android

AppID:	com.darkempire78.opencalculator
Author:	Darkempire
License:	GPL-3.0-only
Donation:	Webpage
InRepoSince:	2022-07-27
LastRepoUpdate:	2025-04-13
LastAppUpdate:	2025-04-13
LastVersion:	3.2.0
Categories:	Office
APK source:	Github
Google Play:	Check if it's there

This modern and beautiful scientific calculator will help you solve all your calculations. It is simple, effective and contains no advertising. It has different themes to suit your phone perfectly.

The app allows you to do simple and quick calculations with many basic functions, including multiplication, division, root, powers, factorials and even trigonometry functions. OpenCalc is customizable to meet all your needs.

Contains no unnecessary ads or permissions. It is fully open source.

Hint: This app is available in both, F-Droid Main and IzzyOnDroid repos.

Download Source Issues ChangeLog

While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device. Some clients have this repo enabled by default, e.g. Neo Store, Droid-ify, or, of course, the IzzyOnDroid client by Sunil. With others (like the official client) you'll have to add this repo manually (see the hint on top of the package list for how to do that).

Packages

Version 3.2.0 (2025-04-13)

Android Versions:

Target: 14.0
MinVer: 5.0

Signing Blocks

Permissions:

Malware-Check:Passed

16 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Google Material Design (Utility)
library to help with material design guidelines.
Android Sliding Up Panel (UI Component)
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Payment Modules:

None found
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Ads & Analytics:

None found
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Download (2.3 M)

Version 3.1.4 (2025-03-16)

Android Versions:

Target: 14.0
MinVer: 5.0

Signing Blocks

Permissions:

Malware-Check:Passed

16 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Google Material Design (Utility)
library to help with material design guidelines.
Android Sliding Up Panel (UI Component)
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Payment Modules:

None found
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Ads & Analytics:

None found
library to add a draggable sliding up panel (popularized by Google Music and Google Maps).

Download (2.2 M)

OpenCalc

Packages

Version 3.2.0 (2025-04-13)

Android Versions:

Signing Blocks

Permissions:

Features:

Malware-Check:Passed

16 Libraries detected:

Version 3.1.4 (2025-03-16)

Android Versions:

Signing Blocks

Permissions:

Features:

Malware-Check:Passed

16 Libraries detected: