MassBox is a Ghostbox created for ITC research with 2 reversed sound banks with sweep rate from 75 ms to 650 ms. The button in the middle to turn on/off the app while the plus and minus button to control the sweep rate speed.
Download the setup package of MassBox SpiritBox 1.0 that is provided for free and have a look at users' reviews on Droid Informer. The app is designed for Android 1.6 and above. The download of this application doesn't contain viruses or any kind of malware. The tool was originally created by MassParanormal and it refers to the Lifestyle category.
MassBox SpiritBox has been downloaded and installed by over 10K users and its most recent update was released on Apr 8, 2016. The app was rated 3.4 on Google Play.
The way users see it, the weak point of this application is intrusive ads.