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1. It is easy to use with large buttons, clean and stylish design, and provides the basic functionalities most people need for daily calculations.i use this one i didn't have any pro, recommend if u don't having calculater in phoneOh look!!... finally, a calculator with a % key... Holy s**t!! - would give 5⭐ but #1.

2. Google's "default" calculator has no ads, is lightweight, and can properly process multiple operations.Great app, it really helped out when I couldn't find my Casio calculator but I did need a fraction button at some times and I couldn't seem to find one in this app.

3. I would recommend this to people who want apps like this but have a backup with a fraction button in case you need it.Absolutely great! my phone doesn't have a calculator like other phones.

4. Plan to uninstall.Confusing and uses commas instead of decimal points.This calculator is good for very basic math and that's what it is advertised as so I'm fine with that.

5. Ads are annoying but you can disable them for a fee which is fair.Doesn't allow multiple operations to be entered at the same time, so the user has to sort out Order of Operations and enter them manually in proper order.

6. Unfortunately, I'm looking for something more beefy that can deal with physics equations, but as I said, this app is up-front about it being just a basic calculator.

7. So 10+10+10*100 ends up being 3000 (incorrect) instead of 1020 (correct use of Order of Operations)... On a positive note, for TWO numbers and ONE operation, it does fine.

8. Has too many themes... dude, it's a calculator, not a My Little Pony sticker book and #2.

9. Fix these two things and you'll get 5⭐ from me.Wrong calculator.

10. It unnecessarily converts the %age to a decimal number before the operation is complete, just adds an unnecessary step.

11. Except the ads its very simple super and convenient to use the calculatorThis was a great app until a recent upgrade(or something).

1. Fix Calculator Not Working/Crashes/Errors/Unresponsive & Black/White screen:

1. Restart Calculator: Restarting the app will resolve most errors.
2. Update the Calculator App. Here is how:
   1. On Android goto PlayStore » Search for "Calculator" » Open Calculator » click "Update".
   2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Calculator » click "UPDATE".
3. Clear Calculator app cache: Clearing cached data will force your app to retrieve the latest data directly from Calculator servers.
   1. On Android, goto Settings » Apps » Select "Calculator" » click Storage » click "Clear Cache".
4. Check Calculator app permissions. If any of these permissions required to use your device's features are disenabled, Calculator might not work.
5. Uninstall and reinstall Calculator. If nothing else has worked, completely uninstall Calculator then reinstall.
6. Restart your device. Last, restarting your device can often clear most problems causing Calculator not working

2. Fix Calculator Server issues & Internet Connection

1. Check network connection: An unstable Internet will make Calculator be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
2. Disable VPN: VPN can cause connection errors and lead to Calculator not working. Make sure all VPNs are off
3. Enable background data: When Background data is turned off, Calculator may not be able to connect to the Internet when running in the background.