Amazon / Utilities / BACK BUTTON
REVIEW
A floating back button that papers over Fire OS's least consistent gesture.
Wormhole Space's Back Button drops a draggable overlay onto every screen so you never have to hunt for the system navigation that Fire tablets keep moving around.
BY THE APP COMRADE DESK · MAY 10, 2026 · 3 MIN READ
Fire OS has a back-button problem. The hardware button is gone, the on-screen navigation bar is hidden in most full-screen apps, and the swipe-from-the-edge gesture is interpreted differently by Silk, Prime Video, and half the third-party apps on the store. On a tablet that is mostly handed to kids or wall-mounted as a kitchen screen, that inconsistency is the whole user-experience complaint.
Back Button is the cheapest possible fix. It is a free, single-purpose overlay from a small developer that does one thing: floats a draggable button on top of whatever is running, and sends a back event when tapped. No account, no subscription, no advertising tier, no second screen of features waiting to be unlocked.
It exists because Fire OS’s own back gesture is the inconsistency, and a permanent floating button is the cheapest possible fix.
It exists because Fire OS's own back gesture is the inconsistency, and a permanent floating button is the cheapest possible fix.
FEATURES
Back Button installs as an accessibility-style overlay that floats above whatever app you are using. Drag it anywhere on the screen, tap it to fire a system back event, and it stays put across launches and reboots. There is no full-screen UI to speak of — the configuration screen is one page of toggles for size, opacity, and which edge the button magnetises to.
The whole app is built around a single job. It does not add a home button, a recents button, or a notification shade trigger. It does not try to be a launcher. It sits on top, gets out of the way when you are typing or watching video, and dispatches a back action when tapped. On Fire HD and Fire Max tablets where the system navigation bar disappears in full-screen apps and the swipe-from-edge gesture is unreliable, that is the entire pitch.
MISSION ACCOMPLISHED
The size and opacity controls are the right two knobs. Shrink the button to a faint dot in the corner and it disappears into the bezel until you reach for it; bump it up and it becomes a usable target for kids' hands or shaky thumbs. Either way it survives reboots, which sounds trivial until you have used Fire OS utilities that quietly forget their settings every patch cycle.
Battery cost is invisible in normal use. The overlay is a static view, not a polling service, and it does not need network access. That is a low bar for a single-purpose utility but the bar is one a surprising number of Fire-OS overlays still fail to clear.
ROOM TO IMPROVE
Customisation stops where it gets interesting. There is no way to assign a long-press to a second action — home, recents, screenshot — which would turn the same overlay into a genuine navigation replacement instead of a single key. The icon itself is a generic arrow with no theming, and on dark wallpapers the default colour can vanish entirely until you find the opacity slider.
Permissions are also a friction point. Fire OS requires you to enable the overlay through the accessibility-services menu, and the in-app walkthrough is one screenshot and a sentence. First-time users routinely sideload the app, tap the button, see nothing happen, and uninstall before realising they never granted the toggle.
CONCLUSION
Install this if the Fire tablet you are handing to a parent, a child, or a kiosk needs a back action that is always in the same place. Skip it if you are happy with the stock gesture or running a Fire device new enough that the navigation bar behaves. The next thing to watch for is whether Wormhole Space ever adds a configurable second gesture — that one change would move this from utility patch to genuine navigation replacement.