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A custom iOS keyboard that rewrites selected text in place — fix grammar, change tone, translate, or run your own prompts. On-device Apple Intelligence by default; bring your own OpenAI or Gemini key for cloud models. No backend, nothing stored or logged.
Hi Product Hunt!
I type most of my messages on my phone, and they come out… rough. Fixing them meant copying text into a chatbot app and back. So I built SmartKeyboard: a keyboard that transforms the text right where you're typing — in Mail, WhatsApp, Notes, anywhere.
Tap a prompt and it fixes grammar, changes tone, translates, expands, adds emojis, or runs a prompt you wrote yourself ("make this sound like a pirate" works great).
A few things I care about:
• There is no backend. The default engine is Apple's on-device model, so the free tier is unlimited, works offline, and your text never leaves the phone.
• Cloud models are strictly bring-your-own-key (OpenAI or Gemini). Requests go from the keyboard straight to the provider — I run no servers, store nothing, log nothing.
• The free tier needs no account and no API key. Subscriptions only unlock the cloud plumbing and unlimited custom prompts.
Honest limitations: it needs iOS 26 (for Apple Intelligence), and iOS gives keyboards only a few hundred characters of context around the cursor, so it transforms paragraphs, not essays.
I would love to hear what you think, and I am around all day to answer questions.
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About Smart Keyboard AI on Product Hunt
“On-device AI keyboard — rewrite text in any app”
Smart Keyboard AI was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #160 on the daily leaderboard. A custom iOS keyboard that rewrites selected text in place — fix grammar, change tone, translate, or run your own prompts. On-device Apple Intelligence by default; bring your own OpenAI or Gemini key for cloud models. No backend, nothing stored or logged.
Smart Keyboard AI was featured in iOS (110.6k followers), Productivity (658.2k followers) and Artificial Intelligence (475.9k followers) on Product Hunt. Together, these topics include over 303.9k products, making this a competitive space to launch in.
Who hunted Smart Keyboard AI?
Smart Keyboard AI was hunted by Vladimirs Matusevics. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Vladimirs Matusevics