Does Back Tap work with a third-party keyboard on iPhone?
Back Tap listens for double and triple taps on the case through the phone’s own motion sensors, not through whatever is on screen, so it runs the same regardless of which keyboard is showing. Here is what it can actually be pointed at, why “switch keyboard” is not one of the options, and the one gesture that already does that job.
Back Tap turns two quick taps on the back of the phone into a shortcut for something else — a screenshot, Control Center, a Shortcut you built yourself — without needing a finger anywhere near the screen. Adding a keyboard that is not Apple’s own raises a fair question: does a gesture aimed at the back of the phone even notice, or care, what is drawn on the front of it? It does not, and the reason is where the gesture is actually detected.
It is read from the case, not the screen
Turn it on in Settings → Accessibility → Touch → Back Tap and iOS watches the phone’s own motion sensors for the small jolt a tap on the back of the case produces, then counts whether it happened twice or three times in quick succession. Nothing about this involves the screen, the accessibility tree an app or keyboard draws, or which text field currently has focus. It is closer to the tap detection behind a step counter than to anything a keyboard extension is built to expose.
Why that makes the keyboard irrelevant to it
Because Back Tap never looks at what is on screen, it has no way to know whether Apple’s keyboard or a third-party one is currently up, and no reason to need to. A double or triple tap fires the assigned action the same way whether a keyboard is open at all, mid-typing, or the phone is sitting on a table showing the Home Screen. It is a sibling case to AssistiveTouch in that respect — both sit above the keyboard rather than inside it — except Back Tap does not even draw anything on screen for a key to be blocked by.
What it is actually a shortcut for
The assignable actions are general phone actions — a screenshot, Control Center, Notification Center, Home, muting the ringer, an Accessibility Shortcut, or a Shortcut from the Shortcuts app — rather than anything specific to text or typing. None of them reaches into a keyboard extension to press a particular key or change a particular setting, because Back Tap hands off to the same system-level actions any of the phone’s physical buttons would, and a keyboard extension is not one of the things a physical button on an iPhone has ever controlled either.
Why “switch keyboard” is not on the list
There is no Back Tap action for jumping to a different keyboard, and no Shortcuts action for it either, because switching the active keyboard is not something iOS exposes to anything outside its own Settings → General → Keyboard → Keyboards list and the globe key. A keyboard app cannot register itself as a Back Tap target any more than a translation app can, and Shortcuts has no building block for “make keyboard X active” to hand to Back Tap even if one existed. This is a gap in what the whole system allows automating, not something a specific keyboard was built to support and simply left out.
The gesture that already does this job
Switching keyboards has its own dedicated control: the globe key 🌐, bottom-left of the keyboard once more than one is installed. A single tap moves to the next keyboard in the order set in Settings; pressing and holding it instead opens a small picker listing every keyboard on the phone, so jumping straight to one specific keyboard takes one press-and-hold rather than several taps cycling through the rest. It is slower to reach than a tap on the back of the case would be, but it is the one control iOS actually built for this, and no accessibility feature bypasses it.
What still forces Apple’s keyboard
A secure text field — a password box, a card number entry — swaps in iOS’s own keyboard the instant it gets focus, and Back Tap changes nothing about that. The swap happens at the same system level whether or not Back Tap is configured, and no keyboard, third-party or Apple’s, has a way to opt out of it.
Where Kibo fits
Kibo has no Back Tap setting because none is needed — the gesture operates entirely outside the keyboard extension, and Kibo shows up exactly as often, and behaves exactly the same, whether Back Tap is configured or switched off. Its own globe key cycles between installed keyboards on a single tap, and a press-and-hold opens the same iOS picker described above. Full Access is a separate matter again: Kibo reads it only for the Copy word, Copy line and Paste buttons on its own toolbar, and Back Tap has no bearing on that either way. Kibo is free to download.
Frequently asked questions
Does Back Tap work with a third-party keyboard on iPhone?
Yes, in the sense that it works the same regardless of which keyboard is active. Back Tap is detected through the phone’s motion sensors rather than anything drawn on screen, so it has no way to tell one keyboard from another and no reason to.
Can I set Back Tap to switch to a specific keyboard?
No. There is no Back Tap action, and no Shortcuts action either, for changing the active keyboard — iOS does not expose that capability to anything outside its own keyboard list and the globe key. Press and hold the globe key on the keyboard itself to jump straight to one.
Does using Back Tap require Full Access for a keyboard?
No. Back Tap is an Accessibility setting that operates outside any keyboard extension entirely, and Full Access is a separate per-keyboard permission that only covers network access and the system clipboard. Neither one touches the other.
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.