Prompt Writer

YOUR AI, YOUR KEYS, YOUR CHOICE. Prompt Writer turns your rough ideas into polished, professional AI prompts — using AI providers you connect yourself. No subscriptions. No markups. No middleman taking a cut. USE FREE APIs OR YOUR OWN PAID ACCOUNTS • Connect free API keys from Gemini, Groq, and OpenRouter — no credit card required • Or plug in your own paid accounts: ChatGPT, Claude, Grok, DeepSeek, Cerebras • You deal with the AI providers directly (or pay nothing at all) — we never touch your money • Your keys are encrypted and stored only on your device HOW IT WORKS 1. Type a rough description of what you need 2. Tap your AI provider 3. Copy the polished prompt — or tap Share to send it straight to an AI app, a text, an email, or save it as a PDF KEY FEATURES • 8 AI providers to choose from • One-tap copy of your polished prompt • Share straight to ChatGPT, Grok, Claude, DeepSeek, Gemini, Groq, OpenRouter, or Muse • Built-in update prompts — the app tells you when a new version is ready • Dark and light themes • No account needed, no ads, no data collected One $2.99 purchase and the app is yours forever — and with free API keys, every prompt after that costs you nothing. PLEASE NOTE: free API tiers are set by the AI providers, not by us. A provider can change or end free access at any time, which is outside our control — but Prompt Writer will always work with whichever providers you connect, free or paid. DISPLAY NOTE: if your phone's font size or display zoom is set very large, some button labels may wrap or look squeezed. Prompt Writer is designed for default display settings.

First public release. Describe what you want in plain words, pick one of 8 AI services, and get a polished prompt back - using your own API keys. Then share the result to your AI app, a message, or email, or save it as a PDF.