OpenCalc - Calculator is a tools app developed by Darkempire.
Download Statistics
OpenCalc - Calculator has been downloaded 280 thousand times. In the last 30 days, the app was downloaded 5.4 thousand times.
User Ratings
OpenCalc - Calculator is rated 4.13 out of 5 stars. The rating is based on 1.1 thousand ratings.
App Information
OpenCalc - Calculator is FREE to download. The APK download size is 1.96 MB. The latest version available is 3.1.4. The last update was on January 22, 2025.
Technical Requirements
OpenCalc - Calculator requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since November 2022.
Description
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.
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Hello Dark empire, App doesn't close with lock screen. i.e. when the lock screen button is pushed screen turns off but when it's pushed again the calc app is open and usable without unlocking the phone. I actually like that it does this, but it needs a setting to enable or disable this function. Keep up the good work.
★★★★☆Cytrozer· Mar 21, 2025
Bug report: the dark theme in this app is displayed as "amoled" while amoled is displayed as "dark". Everything else is excellent, and... especially, open-source.
★★★★★Denis Mattos· Jan 10, 2026
Opencast is awesome, free and independently developed. That, alone, is worth 5⭐️ in my book. But feedback is important, all the same. So: the history is still being randomly erased. For long-term history, this is almost irrelevant, but can be quiet bad when you're doing several calculations and short-term vanishes suddenly. I know the latest update addressed this, but I have it up-to-date, and it's still happening.
★★★★★Katy Jojo· Oct 30, 2025
It's so amazing! I love open-source apps, especially. Haven't had an issue with it yet. And it does calculations well!
★★★★★Brent B· Jun 26, 2025
Best open source calculator that is accurate!
★☆☆☆☆David Roberts· Aug 12, 2025
Where's the memory keys?!?! This app would be perfect otherwise. The memory keys could be turned on in the settings. Otherwise, this would be five stars perfection.
★☆☆☆☆Tracie Green· Apr 9, 2025
I've had to delete this app because no matter what I do, it will not retain history. I've emptied cache and storage, and it's made no difference. I've uninstalled and reinstalled, and it's made no difference, the history is not retained.
★☆☆☆☆Gord Zaretzki· Aug 19, 2025
THIS IS A DESPICABLE SPY APP WITH HUNDREDS AND HUNDREDS OF APP TRACKING ATTEMPTS BLOCKED BY MY APP TRACKER/ BLOCKER EVERY DAY!!!
★★☆☆☆B· Mar 20, 2025
Good start, my 2 issues: the dark theme buttons are egregious. The bright RGB UI looks amateur. E.g: Using the My Material design with my phones dark mode on looks amazing. There needs to be a My Material (dark) theme as an option, I'm not switching to dark mode on my. Phone specifically for this app. The drop arrow containing cos, sine, etc. doesn't stay down. I have to press it each time I open the app. For me, the button size and spacing is perfect when the drop down is. Please add these!
Google Play Rankings for OpenCalc - Calculator
This app is not ranked
Technologies used by OpenCalc - Calculator
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