AI Chatbot & Writer

KnowIt AI does one thing well: it puts four top-tier AI models—Claude, ChatGPT, Gemini, Grok—into a single iPhone app with a generous free tier. For anyone who wants to switch between models for different tasks (creative writing, code, research) without paying for multiple subscriptions, it's the best mobile bargain we've seen. The free tier is the hook: unlimited daily queries with a cap (usually a few hundred per day) across all models, though heavy users will hit limits. For light to moderate use, it's genuinely free and functional. Voice input, image analysis, and file uploads all work, making it a capable everyday assistant. When to pick this: you're an iPhone user who regularly uses AI for writing, coding, or quick research, and you don't want to manage separate subscriptions. It's also ideal for students who need essay help and developers who want to compare model outputs on the go. When to pass: if you need a desktop or web interface. KnowIt AI is iOS-only with no web access—no Mac app, no browser. If you're a heavy API user or team collaborator, this isn't built for you. Privacy-conscious users should note that queries are sent to multiple third-party models. The closest alternative is Perplexity AI—it has a web interface and real-time search but fewer models and a pricier Pro tier. ChatGPT's iOS app is more polished but locks you into one model. KnowIt AI's diversity and price are its edge. Real-world caveat: the app's model-routing isn't always perfect—we've seen it pick a weaker model for a task that another would handle better. There's no manual model override on the free tier (Pro adds that). Offline mode is limited to basic responses, not full model access. Still, for the price, it's a compelling start.