You have two choices, the first one click the download button, choose the version you wanted about Oil Field Handy Calc (Pro) mod apk. Allow Chrome to install unknown apps by going to Settings > Apps > Menu > Special access > Install unknown apps. Install a file manager (such as Cx File Explorer or File Manager) so that you can find the APK file after you download it to your phone. Download an APK file and open it to install it. The second one, download HappyMod app, then download and install Oil Field Handy Calc (Pro) mod apk with one click.

HappyMod is a store of app and game mods apk, you can eaily search, download and install almost all the hot apps. How to allow unknown apps on Android？ Before you can download APK files using Chrome or any other browser, you must first allow unknown apps: 1.Go to your device settings and tap Apps & Notifications (or Apps in older versions of Android). 2.Tap the three dots in the upper-right corner. 3.Tap Special access. 4.Tap Install unknown apps. 5.Tap Chrome (or whichever web browser you use) 6.Move Allow from this source to the On position.

1.Open your browser and download the HappyMod APK file from happymod.com. 2.Open Android Settings and go into Privacy or Security. 3.Tap the option to Allow Unknown Sources and enable it. 4.Go to your Android downloads and tap the APK file. 5.Follow the directions on the screen to install it.

Yes. All Apps in the HappyMod are safe for your Android device to download. Why some MOD APK is not working? Mod apk is a modified apk of the original, it may not compatible with all devices, so some device must can not use it. You may find the same mod, some users work well, but someone can not run it.

Firstly you need ensure that you have uninstalled the original one of the app or game, then you may run the mod apk.

No, HappyMod is developed for Android only, all the ios version of HappyMod on the internet are fake.