Please install this app only if you take an active role in the GCS Study and you already have a username for this app. This app will not work unless you already have a username.
It's free of charge to get the installation package of GCS Study, also, you can have a look at users' reviews on Droid Informer. The app runs on Android 4.0 and higher. The download of this application is 100% safe. Irody, Inc. is the developer of the tool which can be found in the Health & Fitness category.
The developer rolled out a new version of GCS Study on Oct 21, 2016 and over 100 users downloaded and installed the app. This application has the overall rating 4.8 on Google Play.