How much does Ask AI cost?

Ask AI is a one-time App Store purchase. There is no subscription fee, as the developer covers the per-query OpenAI API costs to keep the model viable for users.

Which AI model does Ask AI use?

The app routes queries through OpenAI's official API using the GPT-4o mini model. This specific model keeps inference costs low enough to support the no-subscription pricing structure.

Is Ask AI available on iPhone or Mac?

No, Ask AI is explicitly watchOS-only. The developer has stated that an iOS or macOS port would break the unit economics of the one-time purchase model.

What languages does Ask AI support?

It supports more than 30 input and output languages, including English, Spanish, French, Chinese, and Japanese. Voice output automatically selects a voice matching the response language.

Does Ask AI offer API access or open-source code?

No, Ask AI is a niche utility, not a platform. It is not open source and does not provide an API for external integration or development.

Ask AI

ChatGPT on your wrist: a watchOS-only AI assistant from Sindre Sorhus with no subscription.

Paid· One-time App Store purchase; no subscriptionWritingGPT-4o mini6.8 / 10

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In short

Ask AI is a watchOS-only app by Sindre Sorhus that brings GPT-4o mini to your Apple Watch. It offers a one-time purchase model for quick, on-wrist AI assistance without monthly fees.

Best for

Pick Ask AI if you own an Apple Watch and want quick, on-wrist access to a ChatGPT-style assistant without paying a monthly subscription.

Skip if

Skip it if you don't use an Apple Watch, need a top-tier model, or want long-form writing, code, or API integration.

Ask AI is a watchOS app from prolific open-source developer Sindre Sorhus that puts a ChatGPT-style assistant directly on the Apple Watch. You can dictate or type a question and get answers, translations, recommendations, math help, or writing suggestions, with voice output that automatically picks a voice matching the response language. It supports more than 30 input/output languages including English, Spanish, French, Chinese, and Japanese.

The pitch is convenience and pricing: it's a one-time App Store purchase rather than a recurring ChatGPT Plus subscription, with the developer eating the per-query OpenAI API costs. Under the hood it routes queries through OpenAI's official API using GPT-4o mini, which keeps inference cheap enough to make the no-subscription model viable. It is explicitly watchOS-only — the developer has said an iOS or macOS port would break the unit economics.

This is a niche utility, not a platform. There's no API, it's not open source, and it doesn't try to compete with desktop AI clients on power features. It's aimed at Apple Watch owners who occasionally want to ask an LLM something without pulling out their phone.

Editor's take

A charming, single-purpose utility that nails one thing: ChatGPT on your wrist for a flat fee. The GPT-4o mini ceiling is real, but for quick translations and one-shot questions while your hands are full, it's a genuinely useful Watch app from a developer with a long track record of shipping quality software.

— The AI Tool Bible editorial team

Pros

✅ One-time purchase, no recurring ChatGPT subscription
✅ Native watchOS app with voice and keyboard input
✅ Supports 30+ languages with automatic voice selection
✅ Built by a well-known, reliable indie developer (Sindre Sorhus)

Cons

⚠️ watchOS only — no iOS, iPadOS, or macOS version
⚠️ Uses GPT-4o mini, not a frontier model
⚠️ No API, no open source, no web access
⚠️ Limited to short Q&A use on a tiny screen

Use cases

quick-qatranslationwriting-helpmath-helpvoice-assistant

Frequently asked

How much does Ask AI cost?: Ask AI is a one-time App Store purchase. There is no subscription fee, as the developer covers the per-query OpenAI API costs to keep the model viable for users.
Which AI model does Ask AI use?: The app routes queries through OpenAI's official API using the GPT-4o mini model. This specific model keeps inference costs low enough to support the no-subscription pricing structure.
Is Ask AI available on iPhone or Mac?: No, Ask AI is explicitly watchOS-only. The developer has stated that an iOS or macOS port would break the unit economics of the one-time purchase model.
What languages does Ask AI support?: It supports more than 30 input and output languages, including English, Spanish, French, Chinese, and Japanese. Voice output automatically selects a voice matching the response language.
Does Ask AI offer API access or open-source code?: No, Ask AI is a niche utility, not a platform. It is not open source and does not provide an API for external integration or development.