Does Reachability work with a third-party keyboard on iPhone?
Reachability slides the top of the screen down so a thumb can reach it — the keyboard, already docked at the very bottom, was never the part of the screen it needed to move. Why that makes it behave identically on any keyboard, unlike the one-handed keyboard mode it gets confused with.
A tall iPhone held in one hand makes the back button in the top-left corner a real stretch for a thumb, and Apple’s answer to that has been sitting in Settings for years: Reachability, the swipe or double-tap that pulls the top of the screen down within reach. If you have swapped in a keyboard with its own themes and sound, it is fair to wonder whether that system gesture still behaves itself once your keyboard is the one on screen, or whether it was ever built with Apple’s own keyboard specifically in mind the way some other one-handed features are. It works exactly the same either way, and the reason is worth knowing rather than taking on faith.
What Reachability actually does
Turn it on at Settings → Accessibility → Touch → Reachability, then trigger it mid-app with a gesture that depends on the phone: on any iPhone with Face ID, swipe down lightly on the strip right along the bottom edge of the screen, just under the Home indicator; on an iPhone with a Home button, double-tap it softly instead of pressing it in. Either one slides the top half of whatever is on screen — a back button, a Safari tab strip, a Mail toolbar — down toward the middle, close enough for the same thumb holding the phone to tap without a grip shift. Tap the empty strip left at the top, or simply carry on using the app, and it slides back up on its own a moment later.
Why there is nothing at the keyboard for it to pull down
Reachability exists to solve one specific problem: something worth tapping sits at the top of a screen that has grown taller than a thumb can comfortably span from the bottom. A keyboard was never that problem. It is already docked to the very bottom edge — the one part of the screen already closest to the hand holding the phone, on every keyboard iOS runs, Apple’s own or a third-party one. Trigger Reachability while a keyboard is open and it does exactly what it does everywhere else: the content sitting above the keyboard slides down, and the keyboard itself stays put, because it was never the thing needing to move closer.
A different layer of iOS than the keyboard’s own drawing
Reachability is a shift applied to an app’s own window — the same repositioning it would do in Settings or Photos, with no keyboard involved at all — rather than something that reaches down into a keyboard extension and resizes or repositions what that extension drew for itself. A keyboard sits in its own fixed frame at the bottom of the screen, presented underneath that window rather than as part of it, so Reachability’s shift has no path into that frame even if it were built to look for one. That is a different relationship than the one behind Apple’s one-handed keyboard mode, where the shrinking is written into the keyboard’s own code rather than imposed on it from outside — covered in more detail in the guide on why one-handed keyboard mode does not carry over to a third-party keyboard.
Why this makes it more reliable than one-handed keyboard mode, not less
One-handed keyboard mode only shrinks and docks Apple’s own keyboard because that behaviour is built into Apple’s keyboard specifically — something a third-party keyboard would have to write for itself, and most have not. Reachability never depended on a keyboard’s own code in the first place, so there is no equivalent gap for a third-party keyboard to fall into. It shifts the same window content down whether the keyboard docked beneath it is Apple’s, a language keyboard added for a second alphabet, or a custom one running its own theme, sound and lighting — the keyboard was never on the list of things Reachability reaches into.
Turning it on
- Settings → Accessibility → Touch → Reachability, and switch it on.
- On a Face ID iPhone: swipe down lightly on the strip along the very bottom of the screen, just below the Home indicator.
- On a Home button iPhone: double-tap the Home button softly, rather than pressing it in.
- Tap the empty top strip, or keep using the app normally, and the view returns to full size on its own.
Where Kibo fits
Kibo sits at the bottom edge of the screen the same as any keyboard, so Reachability leaves it exactly where it is, the same as it leaves Apple’s own keyboard alone — there is nothing to turn on inside Kibo for this, and no theme, sound or language changes what happens. It is a screen-position gesture handled entirely by iOS above the keyboard layer, so it has no reason to touch Full Access either, which Kibo reads only for the Copy word, Copy line and Paste buttons on its own toolbar. Kibo is free to download.
Frequently asked questions
Does Reachability move a third-party keyboard down on iPhone?
No. It only pulls down the app content sitting above the keyboard — a back button, a toolbar, a message list. The keyboard is already docked at the bottom of the screen, which is the part of the screen Reachability exists to bring closer, so it has nothing to do there and stays exactly in place.
Why does one-handed keyboard mode not work with my custom keyboard, but Reachability does?
One-handed keyboard mode is a shrink-and-dock behaviour built into Apple’s own keyboard code, so a third-party keyboard needs its own version of it to offer the same thing. Reachability is a system-level shift applied to the app’s window above the keyboard entirely, so it never depended on the keyboard’s own code and works identically no matter which keyboard is docked underneath it.
Why does double-tapping the Home button do nothing on my iPhone?
That gesture only exists on iPhones with a physical Home button. On any iPhone with Face ID, Reachability is triggered instead by swiping down lightly on the strip along the very bottom edge of the screen. Either way, Settings → Accessibility → Touch → Reachability needs to be turned on first.
Try it on your own keyboard
Kibo is a free custom keyboard for iPhone with real mechanical key sounds, a wardrobe of themes and RGB backlight effects. No account, no ads, and it works with Full Access left off.