ExpertAgent: Prompt Builder

Stop starting every AI chat from zero. ExpertAgent is a native iPhone app that helps you build polished expert system prompts — then use them in ChatGPT, Claude, Gemini, or any AI chat you already use. It is not a chatbot. It is your prompt workshop: define role, experience, expertise, and tone once, and reuse that context every time. Whether you are tired of generic answers, re-explaining your background, or inconsistent AI tone, ExpertAgent turns a quick setup into a reusable expert persona you control. KEY FEATURES • Expert Builder — A guided 2-step flow: pick your role, shape skills and tone, then generate. AI crafts a ready-to-paste system prompt from your inputs. • Use in ChatGPT — One tap opens your expert in ChatGPT, Claude, Gemini, or Perplexity. Copy or share the full prompt anytime. • My Experts library — Save, search, edit, and organize experts on your device. When signed in, your library syncs for backup and cross-device access. Saved experts remain available offline. • Explore — Browse offline role ideas by category to jump-start the Expert Builder. No account needed to browse. • Categories and tags — Filter by field so you can find or build the right persona fast. • Sign in with Apple or email — A secure account keeps your library backed up and synced across devices. • ExpertAgent Pro — Unlimited expert builds, Pro tones, detailed prompt length, and markdown export. BENEFITS • Get specific answers instead of generic tips — Your prompt encodes real role, experience, and domain context. • Never repeat your background — Paste once per chat, not every session preamble. • Consistent expert voice — Lock in tone so the AI stays aligned with how you want to work. • Faster workflow — Build once, use often. Explore role ideas help you start even faster. • Works with the AI tools you already use — No need to switch chat apps. WHO IS IT FOR? ExpertAgent is built for professionals, founders, creators, students, and power users who rely on ChatGPT, Claude, Gemini, or similar tools daily. If your work needs domain depth, structured prompts deliver better results than blank chats. WHY CHOOSE EXPERTAGENT? Unlike scattered notes or one-off snippets, ExpertAgent is purpose-built for expert personas: structured inputs, AI-assisted generation, a personal library, and offline role inspiration in Explore. You stay in control of what the AI knows about your context. PRIVACY Sign in with Apple or email OTP. Your experts sync when you are signed in. We do not use your data for cross-app tracking. See our privacy policy for details. AI DISCLAIMER ExpertAgent generates prompts for productivity and informational use. AI output in third-party chat apps may be incomplete or inaccurate. Do not rely on generated prompts or AI responses as legal, medical, financial, or other licensed professional advice. EXPERTAGENT PRO • Unlimited expert builds • Pro tones including Creative and Analytical • Detailed prompt length • Export prompts as markdown files Weekly plan includes a 3-day free trial for eligible new subscribers. Annual plan is billed upfront. Manage or cancel anytime through your Apple ID subscriptions. GET STARTED Download ExpertAgent, sign in, and build your first expert. Your activation grant lets you experience AI-powered prompt generation on your first build. When you are ready for more, start a Pro trial and keep every expert at your fingertips. Stop re-explaining. Start with an expert. Terms of Use (EULA): https://umberlab.com/expertagent/terms Privacy Policy: https://umberlab.com/expertagent/privacy