According to the search results, the Chai app is no longer available on the App Store and Google Play Store. The developers of the app decided to shut it down due to concerns about its content veering towards NSFW (Not Safe for Work) material and attracting inappropriate content. The app was also found to have chatbots that could be prompted to defend underage relationships and even provide sinister content, leading to its controversial reputation. The decision to take the app down was made by its developers, and this action can be attributed to the legitimate concerns surrounding inappropriate content and the potential adverse impact it had on the experiences and safety of its users. The official statement from the developers did not clarify the actual reasons for the shutdown.