It will not effect the way how system taking screenshot, after that, this app will call a crop activity for the screenshot, while you can crop any area wherever you want to share with your workmates or friends, so the secret is only for yourself, no need to worry it any more.
To Download CaptureAssistant App For PC,users need to install an Android Emulator like Xeplayer.With Xeplayer,you can Download CaptureAssistant App for PC version on your Windows 7,8,10 and Laptop.
Guide for Play & Download CaptureAssistant on PC,Laptop.
1.Download and Install XePlayer Android Emulator.Click "Download XePlayer" to download.
2.Run XePlayer Android Emulator and login Google Play Store.
3.Open Google Play Store and search CaptureAssistant and download,
or import the apk file from your PC Into XePlayer to install it.
4.Install CaptureAssistant for PC.Now you can play CaptureAssistant on PC.Have Fun!