Use AI

Use AI is the kind of tool that quietly makes sense for a specific kind of user: the solo operator who likes having options. If you've ever found yourself bouncing between ChatGPT for one task, Claude for another, and Gemini for a third, the appeal of one app that gives you all of them is obvious. The mid-chat model switching is the killer feature — you can start with one model, realize it's not cutting it, and swap without starting over. The pricing is the real test. Pro at ¥2,550/month (about $29.99) is roughly what you'd pay for ChatGPT Plus alone, so if you regularly use two or more paid AI services, Use AI can actually pay for itself. Max at ¥17,898/month (about $117) is steeper, but it comes with 5× daily usage, maximum reasoning, and early access to new features — worth it mainly for heavy researchers or power users who hit usage caps elsewhere. Where it bites: you're trusting a middleman. The app passes your chats and requests through to third-party models, so you're dependent on their availability and performance. Response times and context windows vary by model, and prioritization for faster image generation isn't guaranteed. Also, there's no team collaboration to speak of, and Android support is still 'coming soon.' Compared to a direct ChatGPT subscription, Use AI gives you more model diversity per dollar. Compared to OpenRouter, it's far less flexible — you can't call models via API, and you're limited to what Use AI chooses to support. But for someone who just wants to chat, generate images, and do research without thinking about infrastructure, it's a strong candidate. In practice, the trial is your friend. For $1 for 7 days, you can test whether the model variety and the app experience actually replace your current setup. Watch the daily usage