iPhone & iPad · Free
AEIOU
Communication that feels like you.
AEIOU is an intelligent communication keyboard for people who can't rely on their voice, and sometimes can't rely on a touchscreen either. Tap, blink or scan to build a sentence and have it spoken aloud, in a voice that can be your own. It's free, and every part of it runs on your device.



The next letter, before you reach for it.
Typing letter by letter is slow, so AEIOU quietly speeds it up. Quick Letters reorder live at the top of the keyboard, learning from how you actually type, so the letter you want ends up under your finger more often. All of that learning happens on the device: no cloud round-trips, no dictionary of you on somebody's server.
And because whole thoughts beat single letters, time-aware phrases use Apple's on-device language model to surface the right thing for the moment: "Good morning" at breakfast, "How are you?" when a conversation starts, "Happy Sunday!" on, well, Sunday. Pin your own phrases, the things only you would say, and they stay one tap away, always.

Speak with a blink.
For the moments (or the lives) where tapping isn't an option, AEIOU can be driven entirely by your eyes. Calibrate once, and a single deliberate blink selects the highlighted cell, using ARKit face tracking on the front TrueDepth camera. Reflex blinks are filtered out automatically, so the keyboard never mistakes a sneeze for a sentence.
Prefer switch-style input? A scanning mode steps through the keys for you. However you select, camera frames never leave the device: AEIOU reads just two eye-closure values per frame and throws them away immediately.

Your voice, kept.
On iOS 17 and later, record a Personal Voice once in your iPhone's settings and AEIOU will speak in it. For someone gradually losing their speech, that's not a feature, it's a keepsake.
Every sentence you speak lands in Recents, ready to say again in seconds: hello, thank you, water please. There's a conversation partner mode too: a grid of one-tap responses for the person beside you, so the back-and-forth stays quick in both directions. And your pinned phrases follow you between iPhone and iPad through Apple's encrypted iCloud sync.

The honest specs.
| Price | Free. |
|---|---|
| Devices | iPhone and iPad, iOS 17.0 or later. |
| Personal Voice | Requires iOS 17+ and a device with the Neural Engine. |
| Blink detection | Requires the front TrueDepth camera (iPhone X and later, supported iPad Pro models). Optional: the keyboard works fully by touch. |
| Internet | Not required. AEIOU works completely offline. |
| Account & tracking | None, and none. |




