Threads broke the record to become the fastest-growing app ever, gaining over 100 million users in less than a week. The Twitter rival dethrones ChatGPT, the previous record holder, which, though not exactly an app, earned 100 million users in just two months. Before that, TikTok held the record, reaching the mark in nine months. Threads, which launched on July 5 for iOS and Android, wields users' Instagram credentials to sign up, making it easier for the existing 1.6 billion users of the photo-sharing app to make the leap. It operates as a separate app from Instagram that users must download and then activate their Threads profile to use it.