Keybuild is an innovative program that allows users to create their own custom keyboards. With this app, touchscreen keyboards no longer have to be one-size-fits-all. Users can choose the layout, keys, and everything else to suit their needs.

One of the standout features of Keybuild is the ability to set up keys to type whatever the user wants. Whether it's letters, Greek letters like ɑ, β, ɣ, math symbols such as π, ∫, ∑, arrows like ↑→↓←, or even favorite emojis, users have complete control over their keyboard.

The app also allows users to create multiple 'panes', each containing keys arranged using a stack-based layout. Switching between panes can be done through an automatic menu or direct links. This feature offers flexibility and convenience for users who require different sets of keys for various tasks.

Keybuild also supports VoiceOver and accessibility APIs, ensuring that it can be used by individuals with visual impairments or other accessibility needs.

It's important to note that this app is 99% SwiftUI, which brings advanced functionality and some unique bugs. However, it currently does not support keyboard extensions on macOS, although it is available on Apple Silicon Macs. Overall, Keybuild provides a powerful and customizable keyboard-building experience on the iPhone.