The app for Google’s AI chatbot Gemini just hit 1 billion monthly users, a significant milestone that competitor OpenAI’s ChatGPT only recently hit. Most of the 1 billion monthly users seem to be Android users, since Google announced in a blog post this week that the Gemini app has more than 100 million active users on Apple’s iOS, implying that most of the rest are probably Android users. It’s worth noting that Google owns Android and Gemini comes pre-installed in many phones using that operating system. Google had shared in its latest earnings report late last month that Gemini was very close to hitting the 1 billion benchmark, putting it in very close competition with ChatGPT, which likely hit 1 billion monthly users back in May, according to data from market intelligence firm Sensor Tower. That pace, of launching in 2022 and hitting 1 billion users only three years later, had made ChatGPT the fastest-growing app ever, beating previous records set by the likes of Google Maps and TikTok. Gemini’s growth also surpassed Google Maps’ previous record with the 1 billion monthly active users benchmark, and the tech giant called the app “the fastest-growing product in Google’s history.”