SMSROBOT LTD is the official developer of this application that can be found in the Business category. The developer released a new version of Vault on October 7, 2015 and over 0,5M users downloaded and set up the app. The overall user rating of the tool is 4.1.
Take into account advertisements and in-app purchases while installing this application. The app is very popular among Samsung and Motorola users. A free .apk file of Vault 1.9 is available from Droid Informer and you can have a look at users' reviews on this site. Prepare 19 MB of free space on your device for this app installer and keep in mind that it runs on Android 2.2 and above.
The security report indicates that the app is totally safe.