Nothing like this exists on phones yet. ChatGPT and Claude work as a pair. Smartphone orchestration of the strongest AIs — no subscriptions, no extra fees, no server, no card.
Free: two AIs from different companies work together right on your phone. On iPhone ChatGPT answers, Claude checks — on your free accounts. No server of ours, no laptop, nothing to pay.
The Duo and Trio shortcuts on this page are free and open source. The Poly A1 app is free too: it installs Duo and Trio for you and walks you through every step, and on Android it does the same automatically — the strongest free AIs from different companies check each other on your free key.
Have ChatGPT and Claude? Start right away. Have one? It helps you install the other. Have neither? Gemini (Google) or Meta AI (WhatsApp, Facebook) helps you install both, free.
How it works
Everything runs on the phone itself. iPhone: a Shortcut calls Ask ChatGPT, then Ask Claude — actions the apps publish themselves; answers pass between your own apps, with no server of ours, on your own accounts — free ones are enough. Android: in the Poly A1 app the phone itself calls free AIs (NVIDIA first, then Google AI Studio, Groq, OpenRouter) with your free key — no card, no server of ours; or by hand with your ChatGPT and Claude. Nothing like it exists anywhere else.
One question: the first AI answers, the second checks and corrects it, and you get one answer on the screen and in the clipboard — about a minute.
You need: an iPhone with iOS 18 or newer; the ChatGPT and Claude apps installed and signed in — free accounts are enough; and not to touch the screen while it runs.
- Tap your language below on the iPhone — Shortcuts opens right away.
- Tap “Add”.
- Run it once and tap “Always Allow” each time it asks about ChatGPT, Claude and the clipboard (4–6 times).
Add Duo
Won’t open? Download the file: English · Español · Português · Русский · Українська
Trio — Duo plus a third voice. After Claude’s check, a free AI from another company names what both of them missed. Any free key works:
- NVIDIA — the strongest (Kimi, GLM, DeepSeek): build.nvidia.com. Asks for email, password and an SMS code.
- No SMS came — a key without SMS: Groq (console.groq.com, not Grok) or Google AI Studio (aistudio.google.com) — sign in with your Google account.
- OpenRouter (openrouter.ai, dozens of free models) — no SMS either; turn on free models once at openrouter.ai/settings/privacy, otherwise they won’t answer.
A key is a long password an AI company gives you for free, no card. You paste it once. Paste one or several, each on a new line — the first run asks once. Trio tries every key and every free model until one answers; only if all fail does it say what each one answered and what to do.
iPhone will ask for permission 4–6 times — tap “Always Allow” each time. If you do not answer quickly, the question disappears and the shortcut then says it “can’t access”: just run it again.
Android: an automatic Duo on a free key — in the Poly A1 app (free, Google Play). Start with NVIDIA (the strongest); no SMS came — Groq or Google, no SMS needed. Without keys — by hand, with two pastes into your ChatGPT and Claude.
The button runs checking; the shortcut’s other modes are in its own folder for whoever wants them.
New in Duo: Debate until agreement — for choices with no single right answer. ChatGPT takes a side, Claude objects, up to three rounds until one agrees; then: where they agree, what is still disputed, what is yours to decide.
Used up free Claude for today? Meanwhile a free AI from another company checks: Trio on a key, or Gemini or Meta AI by hand. Want more Claude? Claude Pro ($20/month, $17 billed yearly; paid to Anthropic) gives at least five times more.