ExpertAgent: AI Experts

ChatGPT Claude Gemini Experts.

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Stop starting every AI chat from zero. Build an expert once, paste into ChatGPT, Claude, or Gemini. First expert free. Stop starting every AI chat from zero. ExpertAgent is a native iPhone app that helps you build reusable AI experts — then paste them into ChatGPT, Claude, Gemini, or Perplexity as Custom Instructions, a system prompt, or your first message. It is not a chatbot. It is not another prompt generator. Define role, skills, and tone once, and start every chat already in context. Whether you are tired of generic answers, re-explaining your background, or inconsistent AI tone, ExpertAgent turns a quick 2-step setup into a reusable expert 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, Claude, or Gemini — One tap opens your expert in the AI app you already use. 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, a reusable expert delivers better results than blank chats. WHY CHOOSE EXPERTAGENT? Unlike scattered notes or one-off prompt snippets, ExpertAgent is purpose-built for reusable AI experts: structured inputs, AI-assisted generation, a personal library, and offline role inspiration in Explore. Paste into any supported chat app — 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 expert building 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

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ExpertAgent 3.0.7 • My Experts is now a launch hub — reuse and paste into ChatGPT faster • Paste-first playbooks with clearer Use in ChatGPT guidance • Refreshed UI, smoother onboarding, and Pro sync fixes

Version 3.0.7

The developer, Umber Lab Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Umber Lab Limited
Size
  • 35.2 MB
Category
  • Productivity
Compatibility
Requires iOS 26.0 or later.
  • iPhone
    Requires iOS 26.0 or later.
  • Mac
    Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.0 or later.
Languages
English and 3 more
  • English, German, Japanese, Spanish
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Umber Lab Limited
  • Privacy Policy
  • License Agreement

    • More by Umber Lab Limited

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