Pika! One - Themes & Wallpaper

Review by eFreeware

If you like your phone to look different from everyone else's, Pika! One is built with you in mind. It gathers the kinds of effects the Pika series has offered separately and puts them in one download, so you get gravity wallpapers, charging animations, Dynamic Island effects and desktop widgets without juggling several apps. The pitch is simple: one install, and the whole set is available.

That combination is unusual. Most personalization apps pick one trick and stay there, while this one treats the lock screen, the charging screen, the Dynamic Island and the home screen as one connected surface. For someone who enjoys tinkering with how a phone looks and behaves, the appeal is having all of that in a single place.

It is free to download, it carries ads, and it offers in-app purchases. The install base sits above 100,000, and the average rating is 4.7 from just over 3,000 ratings.

Gravity wallpapers that respond to a shake

The headline feature is the 3D gravity wallpaper. Rather than sitting still behind your icons, it responds to movement: shake the phone and the wallpaper reacts. The developer pairs this with an unlock animation, so the effect starts the moment you open the phone rather than waiting for you to do something else.

What I like about the idea is that it turns a passive background into something you can poke at. A wallpaper that shifts when you move the phone is a small thing, but it changes the feel of picking the device up. The same wallpaper also carries a charging animation, which means the visual theme continues while the battery fills.

Shaking the phone lets you interact with the wallpaper anytime and anywhere, so the effect is meant to be available beyond the lock screen. If you enjoy tactile touches like that, this is the part of the app most likely to win you over. If you prefer a still image that never moves, the gravity concept will matter less.

Charging screens, Dynamic Island and widgets

Charging gets its own treatment. Once the phone is plugged in, the app can show a charging animation, and there is a separate charging wallpaper that reacts to unlocking, sliding and charging. The developer describes the states switching between each other, so the visual stays coherent as you move from one action to the next instead of resetting.

Dynamic Island animation is the third pillar. On phones that have the Island, the app adds motion and lets you interact with it. It is a cosmetic layer rather than a functional one, but it is the kind of detail that makes a device feel customized rather than stock.

The fourth piece is desktop widgets. Time, battery level and calendar information can sit on the home screen, which rounds out the package with something genuinely useful rather than purely decorative. Between the wallpapers, the charging effects, the Island and the widgets, there is enough here that different people will gravitate to different parts of it.

What the app asks of your phone

One practical point is worth knowing before you install: the AccessibilityService API. The developer explains that it is used only to keep the status bar from being blocked, which is the kind of permission that tends to raise eyebrows, so it is good to see a stated reason attached to it.

The second is the Dynamic Island feature itself. It only makes sense on hardware that has an Island, so owners of other Android phones will get the wallpapers, charging effects and widgets but not that part of the experience. That is a hardware reality rather than a flaw, but it does mean the app's value varies depending on which phone you carry.

On cost, the app is free with ads and in-app purchases available.

Getting the most from it

Because the app covers several areas, it makes sense to start with one and build from there. Pick a gravity wallpaper first and live with it for a few days, since that is the effect you will see most often. Once you know how the motion feels in daily use, adding the charging animation and the widgets is a natural next step rather than a pile of changes at once.

The charging animation is the piece most people will notice without trying, because it appears whenever the phone is plugged in. If you charge on a desk or a nightstand where the screen is visible, that effect does more work than it would if the phone spends charging time face down or in a bag.

Widgets are the part I would treat as the practical anchor. Time, battery and calendar on the home screen are useful regardless of how much you enjoy the animated side of the app, so they are a reasonable place to land if the visual effects turn out to be more than you want. The most recent update mentions optimizing the puzzle wallpaper, which suggests the wallpaper side of the app is still being worked on.

One more thing to keep in mind: with ads in the mix, the experience will not be completely uninterrupted, and the app has been available since May 2025 with updates continuing into late 2026. That track record of updates is a modest positive sign for anyone wary of installing a personalization app that gets abandoned.

A lively pick for tinkerers, a quieter fit for the rest

Pika! One is for the Android owner who treats the phone as something to customize, not just use. If you enjoy gravity wallpapers, animated charging screens, an interactive Dynamic Island and a home screen with widgets, having all of it in one free download is a genuinely convenient arrangement. The 4.7 average across more than 3,000 ratings suggests the approach lands with a lot of people.

The trade-offs are straightforward. Ads are present, in-app purchases exist, the Dynamic Island portion needs the right hardware, and the animated style will not appeal to someone who wants a calm, static home screen. The AccessibilityService permission is explained but still a permission you have to grant.

If the idea of a phone that reacts when you shake it sounds fun, this is a reasonable install to try. If you want your wallpaper to stay put and your charging screen to stay silent, the app's core appeal will pass you by.

What's new in version 1.9.7

Optimize puzzle wallpaper