How does Big Sister work?

The app sits on your child's device and runs with their consent. It automatically checks their activities and interactions. It compares these against Danger Detection algorithms, which have child safety advice built into the code and have been further curated by a panel of experts. If it identifies potential dangers, it sends warning flags to alert you in a timely manner by email with signposts to tips on what to do. You can also log in to your dashboard to see these flags and other patterns and trends.

What is Big Sister and what makes its approach to child online safety different?

Big Sister is an app dedicated to protecting and empowering children in the digital world by using AI to detect dangerous instances and conversations without impacting child privacy. What sets us apart is our commitment to using technology ethically: we support families with tools and education but never use invasive surveillance or exploitative tech. Our vision is a safe internet for all children, where digital safety does not come at the expense of privacy or trust.

Find out more about our Responsible AI

How does Big Sister protect my child online without spying or invading their privacy?

At Big Sister, we believe you don’t need to spy to keep children safe.Instead we automate the safety checks, provide guidance for open communication, practical digital safety education, and promote the ethical use of tech and AI. Our resources support parents and children in building digital skills and confidence—focusing on respect and family trust.

Find out more about our detection methods here.

What should I do if my child encounters cyberbullying or harmful content online?

If your child experiences cyberbullying or unsafe material, offer immediate support and encourage open discussion. Use platform safety tools (like blocking/reporting), document harmful content, and seek professional guidance if needed. Big Sister provides non-invasive alerts that can be downloaded and logged to help report when bullying is detected and, supplies expert-backed resources to help families address online risks together.

Explore how Big Sister identifies online threats.

How can I teach my child to use the internet safely and responsibly?

Discuss safe internet practices regularly: talk about privacy, respect, digital footprints, strong passwords, and recognising potential dangers. Big Sister offers family-focused blogs, conversation starters, and tools all within the app that help children become digital citizens—without resorting to constant monitoring or fear-based tactics.

Read the blog for our most recent articles

Is my child's data secure?

Yes absolutely. We have encrypted the data end-to-end. We are Cyber Security Plus standards, which is the standard to which the government protects their data. To us, your data is as important as state secrets. We monitor our infrastructure, activities, and continually update our systems to guard against potential threats. We minimise the amount of data stored so that the threat surface is minimised.