Disclosure up front. We make PicDock, one of the apps below. So we are not neutral. In exchange, everything here is something you can check yourself — including what our app does not do.
Most guides about turning an old tablet into a photo frame stop at the moment the slideshow starts. That is the easy half. The half nobody writes about is the next six months: the screen times out, the power flickers and the tablet reboots to a lock screen, or the thing glows at full brightness in a bedroom at 2 a.m. and gets unplugged permanently.
A frame is not an app you open. It is a device that has to run unattended, survive its own environment, and never ask anybody for anything. Four things decide whether it does.
The four things
1. Does the screen stay on?
Android turns the display off after a timeout, and that timeout does not care that you are running a slideshow. An app meant for framing holds the screen awake for as long as it is in front. If it does not, you end up raising the system screen timeout to 30 minutes and still watching it go dark — which is the single most common reason a homemade frame gets abandoned.
2. Does it come back by itself?
Power cuts happen. So do firmware updates, and so does someone unplugging the charger to use the socket. If the frame only runs because a human opened the app, then after the first reboot it is a tablet showing a home screen. What you want is the app starting itself when power is connected and after a reboot.
3. What happens at night?
A bright rectangle in a living room is fine at 8 p.m. and hostile at 2 a.m. There are three different answers and they are not the same: dim the screen on a schedule, black the screen but leave the backlight on, or actually turn the display off and wake it in the morning. Only the third one saves power and stops the glow — and it needs the app to set a wake-up alarm.
4. Does the lock screen get in the way?
This is the one that catches people. If the tablet has a PIN and it restarts, the app can launch behind the lock screen: from across the room nothing happened at all. An app that auto-starts has to be allowed to show over the lock screen, or auto-start does nothing on exactly the devices that need it most.
How PicDock handles it
About our app, precisely:
- Screen stays on while the slideshow is in front — you do not have to change the system screen timeout.
- Auto-start when the charger is connected, and after a reboot. This needs one Android permission (Display over other apps), which we ask for at the moment you switch it on. We do not save the setting until the permission is actually granted — a switch that is on while the feature is off is worse than no switch.
- Sleep schedule — set a start and end time. By default it just goes black, and there is an option to really turn the display off, in which case an exact alarm wakes the screen at the end time.
- Night dimming as a separate, milder option — or hand brightness back to the device entirely and let system auto-brightness run it.
- Shows over the lock screen — but only when you asked for it: when this session was auto-started, or when screen-off sleep is on. A session you opened yourself never covers your lock screen.
- On unplug you can have it warn you, or close itself — useful if the frame is a tablet you also carry around.
What we cannot do
Two honest limits. A frame needs to stay plugged in — a permanently lit screen will drain any tablet in hours, and no app setting changes that. And waking a display that the system has put to sleep is not fully reliable on recent Android versions: on a Galaxy Tab S9 FE running Android 16 the standard wake-lock alone did not turn the screen back on in our testing, while a Galaxy S8+ on Android 9 did. We use two mechanisms together for this reason, and it is still the part of the feature we trust least.
In short
Pick the app for the photos, then check the four boring things: screen stays on, comes back after a power cut, has a real night schedule, and is allowed past the lock screen. They decide nothing on day one and everything by month six.
New to this? Start here: turn an old tablet into a digital photo frame.
PicDock — A photo and video frame for Android that stays on, starts itself on power, and sleeps on a schedule. Free to use, with a paid option for extras.