Why can’t I turn on Full Access for a keyboard on iPhone?
The Allow Full Access switch is greyed out, missing, or flips itself back off — and it is almost never the keyboard app’s fault. The two real blockers, Screen Time restrictions and a managed device, and how to tell which one you have.
You add a keyboard, go looking for its Full Access switch to unlock a paste button or a sync feature, and something is wrong with the toggle itself: it is greyed out and will not respond to a tap, the whole “Third-Party Keyboards” section behaves oddly, or the switch turns on for a second and then quietly flips back off. It reads like the keyboard app is broken. It usually is not. There are two real causes worth ruling out before you blame the app, and a third, much rarer one that is just a stuck screen.
Where the toggle is supposed to be
Full Access lives in Settings → General → Keyboard → Keyboards. That screen lists every keyboard you have added, and tapping a keyboard’s name — not the row’s drag handle, the name itself — opens a small settings page for that one keyboard with a single switch on it, Allow Full Access. If tapping the name does nothing, or the switch is there but shaded and unresponsive, something above that screen is overriding it rather than the keyboard refusing the permission.
Screen Time is blocking it
The most common cause on a personal phone is Content & Privacy Restrictions, part of Screen Time. It is designed to limit what changes can be made on the device at all — which apps can be deleted, which content is visible, and, among the settings it can lock down, keyboard changes. When that restriction is active, the Full Access switch stays off no matter how many times you tap it, because the phone is not allowing the underlying setting to change, not because the keyboard is doing anything wrong.
Check Settings → Screen Time → Content & Privacy Restrictions. If restrictions are turned on, look through what is allowed there; a keyboard-related restriction set to “Don’t Allow” is the direct cause. Changing it back needs the Screen Time passcode. On your own phone with restrictions you set up yourself, that is straightforward. On a family device where a parent holds the passcode, or a phone where Screen Time was configured by someone else, you cannot lift it yourself — the toggle will keep failing until whoever set the passcode changes the restriction or shares it with you.
The phone is managed by an organisation
A work or school iPhone is often enrolled in device management, separate from Screen Time entirely. An organisation can push a policy that blocks third-party keyboards, or blocks Full Access specifically, and that policy overrides anything you do in Settings — there is no local workaround, because the restriction is not stored on the phone as something you have permission to change. You can check whether this applies to you in Settings → General → VPN & Device Management: a management profile listed there means an administrator, not you, controls this setting, and getting Full Access working means asking them, not troubleshooting further on your end.
A genuinely stuck toggle
Occasionally neither of the above applies and the switch is simply stuck — it looks on but the keyboard behaves as if it is off, or it visibly reverts within a second of being tapped, on a phone with no restrictions and no management profile. This is rare and usually clears itself: force-quit Settings from the app switcher and reopen it, or restart the phone, then go back to Settings → General → Keyboard → Keyboards → the keyboard’s name and try again from a fresh screen rather than one that had already been open for a while.
Worth checking before troubleshooting further
It is also worth confirming the keyboard actually needs Full Access for what you are trying to do. Typing, autocorrect, themes, sounds and every keyboard language work with the switch off on a well-built keyboard — the honest uses for Full Access are narrower than people assume, typically a clipboard button or a feature that syncs or sends data off the device. If the thing you actually wanted was just to type normally, there may be nothing to fix at all.
Where Kibo fits
Kibo’s Full Access is off by default, and none of it — typing, autocorrect, word suggestions, all 56 themes, all 17 key sounds, all 15 backlight effects, the emoji and kaomoji panels, the 12 fancy text styles, or any of its 30 typing languages — needs the switch on. Turning it on unlocks exactly one thing: the Copy word, Copy line and Paste buttons on the keyboard’s own toolbar, the only place the app reads the clipboard. If Screen Time or a management profile is blocking Full Access on your phone, Kibo still works fully without it; only those three buttons stay unavailable until the restriction is lifted elsewhere. It is free to download.
Frequently asked questions
Why is the Allow Full Access switch greyed out on my iPhone?
Almost always a restriction above the keyboard, not the keyboard itself. Check Settings → Screen Time → Content & Privacy Restrictions first, and Settings → General → VPN & Device Management second, to see whether Screen Time or an organisation’s policy is blocking the change.
I turned Full Access on and it switched itself back off — why?
This usually means Content & Privacy Restrictions is active and rejecting the change rather than accepting it, even though the switch briefly appeared to move. It is the same underlying cause as a switch that will not move at all, just a slightly different visible symptom.
Does a keyboard need Full Access just to type?
No. Typing, autocorrect and word prediction do not require it on a well-built keyboard. Full Access is only for features that need the clipboard or send data off the device, such as a paste button or cloud sync — everything else works with it left off.
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.