This app helps improve the performance of Calculator Vault and solves the following issues:
• Improve the stability of Calculator Vault
• Fixed compatibility issues between Calculator Vault and 64-bit devices running Android 8.0 or 8.0.1 (eg Fix screen blackened when opening a second app in hider)

Note: This application is an add-on to Calculator Vault. Please make sure install Calculator Vault on your device first.

Calculator Vault
• Simultaneously log in to multiple accounts of a social network application or game application on one device
• Protect privacy by stealth installation and hide them on the device