A free live wallpaper app is usually selling something else
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LIVE WALLPAPERANSWERS
live wallpaper appREAD
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photographA live wallpaper app is a program that installs a moving background on a phone by registering a wallpaper service the system runs whenever the home screen is visible, and the ones that cost nothing are almost always being paid for by advertising, by a subscription behind the better items, or by the data collected while the service runs.
This page recommends no app by name. Store listings turn over constantly, an app that was clean last year can be sold and repackaged this year, and a recommendation would go stale before it was useful. How to read a listing does not go stale, and it is a short set of checks.
What a live wallpaper app installs on your phone
What a live wallpaper app installs is not a picture, it is a running service. On Android, live wallpapers are a system feature: an app declares a wallpaper service, the launcher hands it a surface to draw on, and the system starts and stops it as the home screen comes and goes. That is the same mechanism whether the wallpaper is a video loop, a particle effect or a clock, which is why a live wallpaper behaves differently from a still one at the level of the operating system rather than the file.
Three consequences follow, and they explain most of what people notice afterwards. The service draws while the home screen is visible, so a moving wallpaper keeps the GPU and the display awake in exactly those moments; it draws nothing when the screen is off or an app is in front of it; and it stays installed even after you go back to a still background, which is why uninstalling is the only way to be sure it has stopped. A live wallpaper is a video your device never stops playing, in the cases where the app is playing a video at all.
The permissions a wallpaper app should never need
Permissions are the fastest way to read an app before installing it, because a wallpaper has an unusually short list of things it legitimately requires. Anything past that list is doing something other than drawing a background.
| Permission | Legitimate use | Read it as a problem when |
|---|---|---|
| Photos or media | Reading the image you picked | It demands access to all files rather than one |
| Network | Downloading a wallpaper you chose | It runs constant traffic with nothing on screen |
| Run at startup | Restoring the wallpaper after a reboot | It is paired with a persistent notification |
| Notifications | Nothing a wallpaper does | Always, unless the app is also a changer |
| Location | Nothing, on a wallpaper | Always |
| Contacts, call logs, phone | Nothing, ever | Always, without exception |
Two categories deserve a note, because they are common and they look innocent. A wallpaper changer rotates through a folder on a schedule, which is a real reason to run in the background and to send a notification. A collage or editor feature needs to read the images you select. In both cases the scoped version of the permission, one folder or one selected file, does the job, and an app insisting on everything is telling you something.
Where the art in a free wallpaper app came from
The art in a free wallpaper app came from somewhere, and a listing that does not say where is the normal case rather than the exception. An app with a large anime section is the clearest example: those images are frames, character renders and fan art, and none of the three become licensed by being placed in a grid with a download button. The app is not claiming otherwise, it simply never says. Free to download and free to use are not the same thing, and the gap between them is not a technicality when the picture ends up in a screenshot, a stream or a video thumbnail.
Four sources hold up: work a rights holder released with stated terms, work under an open license you have read, work you licensed from the artist, and work you made. Studio Ghibli publishing a large set of stills on ghibli.jp from September 2020, free to use within the bounds of common sense, is the plainest example of the first, and it stands out because most studios have said nothing at all.
How to read a listing in two minutes
- Open the permissions list before the screenshots, and stop if it wants location, contacts or the phone.
- Check the update date, because a wallpaper app abandoned for years is a wallpaper app whose ownership you cannot verify.
- Read the one star reviews rather than the five star ones, since ad frequency and battery complaints only appear there.
- Look for a stated source or license on the art, and treat silence as silence rather than as permission.
- Set one wallpaper, then check the battery screen a day later to see whether the app is listed at all.
- Uninstall rather than merely switching back, because the service stays on the device until you do.
A moving wallpaper against a designed still one
A moving wallpaper is the more impressive of the two for about a week, and a designed still one is the better choice for the year after that. Motion behind the icons draws power whenever the home screen is up, and on an OLED panel a bright static element sitting in one place ages the subpixels under it faster than their neighbors. A still background designed for the screen, with the detail pushed away from where the icons and the clock sit, costs nothing to run and stays legible.
The case for the moving one is genuine where the motion is slow and small: drifting particles, rain, a single element cycling against a black field. On an OLED screen that last combination is also the cheapest, because a subpixel showing pure black is switched off, which is not true of an LCD where the backlight is on regardless of what is displayed.
What the desktop equivalents are, and what they want
On a desktop the same market exists in a different shape. Wallpaper Engine is a Steam program that plays video loops, layered scenes and web pages behind the icons on Windows, it is paid, and its catalogue comes from the Steam Workshop, which is user uploads with whatever rights the uploader claims. Lively Wallpaper and ScreenPlay are open source and cost nothing, with no catalogue attached, so you supply the file. There is a separate paid Wallpaper Engine app for Android that imports wallpapers from the desktop version, and nothing at all for iOS.
Crossing between the two is where the files stop working. The same picture is a different file on every screen involved, which is the constraint an app cannot solve for you. A loop authored for a 1920 x 1080 desktop does not become a phone wallpaper by being copied to a phone: a 16:9 file on a 19.5:9 panel has to be about 3.85 times as wide as the screen once it is scaled to fill the height, and everything past that is off frame.