Calculus VIP is a free Android app developed by VIP Calculus that enables secure communication among healthcare providers, patients, and caregivers. The app allows users to chat one-on-one or in groups, share home measurements, and distribute health plans with goals and actions.

The app provides each patient with a list of healthcare providers in their VIP network, which can be expanded when initiating a chat. The app also ensures privacy by not displaying phone numbers or email addresses of users. The activation of the app is done through the VIPLive web platform used by healthcare providers.

Calculus VIP offers a chat history feature that allows users who join a conversation later to view all previous messages. The app is free for patients, caregivers, and healthcare partners associated with medical practices that use the VIPLive web platform for communication. The web version of the app is also available for patients and provides additional features.

Calculus, the Dutch company that stores chat conversations, complies with national and international standards for information security. The app has personal encryption, and users can open it with a five-digit pin or fingerprint. Photos taken and sent through the app are stored separately for privacy reasons.