A "battery icon" app that can't change your battery icon: ad-funded, gained 6,500 ratings in 9 days

iPhone doesn't let any app change the battery icon in the status bar, but an app called Emoji Battery Charging sells exactly that. Two months after launch it has charted in 100 countries, ranking #1 and #2 in the Graphics & Design free chart in the US, UK, Japan and elsewhere. It is a publisher built around paid acquisition, moving a category that already sold well on Android straight over to iOS and buying installs with ads. Below: what it actually sells, where the installs come from, where the money comes from, and whether you should follow it.

A Jason ad

In Oct 2026 30, a US user gave it one star on the App Store:

"There's a Jason (from Friday the 13th) battery icon in the ad that doesn't exist in the app. I settled for a Halloween Snoopy, and it's either buy premium or watch an ad to 'temporarily' unlock it. By the time I saw that line, it had shown me 3 ads. Uninstalling right now."

The same week, users in other countries were complaining about the same thing, just with different characters: Brits said they saw Dragon Ball on Facebook, Mexicans said NFL and soccer, Americans said Jujutsu Kaisen, and Japanese users said Disney. None of those are in the app.

Complaints or not, the numbers kept climbing. Oct 28 it had 10,893 ratings worldwide in total, Nov 6 it had 17,404, and in 9 days it added 6,511 more. Daily new ratings rose from 313 to 967 (summed across App Store storefronts, 10-28 to 11-06).

What it actually is

The developer is Hypernova Limited. It was listed in Sep 9 and is still on version 1.0 today, with no updates ever. The store page reads: pick an emoji battery icon that "sits in the status bar area," then choose a charging theme. The small print on the last line tells the truth:

"This app provides decorative designs for the battery / status bar area and does not replace or modify Apple's native iOS system battery icon."

What users actually get is put most bluntly by one Canadian review: "Sit through a pile of ads for a blank wallpaper with a tiny emoji on it." Another American review: "It's just a wallpaper app. It doesn't actually change your battery icon or charging animation." On iOS, the only way to get a charging animation is the system Shortcuts app (Automation → When Charging). This app probably just packages that flow and adds a set of images (inferred).

Android is different. Using floating windows and accessibility permissions, it can really replace the status bar battery. This category's selling point was defined by Android; the iOS version can only offer an approximation, and that's where most of the "false advertising" one-star reviews come from.

How fast it grew, and whether it was real

It's #1 or #2 on the Graphics & Design Top Free chart in the US, UK, Canada, Australia, Taiwan, Hong Kong, Singapore and Japan stores. In Japan's overall Top Free chart it's at #10-31 or #184, and it has hit #26 at 11-03. In Pakistan's overall Top Free chart it's #26 (App Store chart, 11-03 to 11-06).

The curve is smooth, 100 several countries rising together, with rank and ratings moving in step. That doesn't look like fake activity. But the star ratings and the written reviews don't match: the US average is 4.42 stars (5,698 ratings), and across roughly 160 written reviews I collected, the US ones average 46 stars and Japan's average 2.1 stars (17 and 1.5 reviews respectively). The most likely explanation is that the app shows the system rating prompt, collecting a pile of easy five-star taps, while only people with real complaints bother to write text (inferred). So treat the rating count as a trend in downloads, and the star rating as a read on sentiment.

Where the traffic came from: the ads look better than the app

TikTok, confirmed running. In the European TikTok ad library, the advertiser "HYPERNOVA LIMITED" (registered address listed as China) had over 3,600 ads running from Nov 2 to 5 (the count capped here). In Nov 6 it dropped to 192 ads. Whether that's a real pullback or a data issue is not yet verified. The copy is simple: "Customize Your Battery" and "Make Charging More Fun." From Oct 18 a Halloween version was added: "Make your iPhone a little spookier with Emoji Battery!" There are also Japanese ("バッテリーをカスタマイズ") and Spanish versions. Notably, one Japanese ad I spot-checked was running in 28 European countries, so Japanese-language creative alone doesn't prove it ran TikTok ads in Japan. What channel drove Japan's early-November chart spike is not visible from outside.

Facebook / Instagram, per users. I couldn't find it in the Meta ad library, but UK users say they saw it on Facebook, and the earlier Jason, Dragon Ball, NFL and Jujutsu Kaisen mentions all trace back to ad creative. Using popular IP and holiday themes that aren't in the app as click bait is its core paid acquisition tactic, and the main source of the one-star reviews.

Store search and charts. The name is literally "Emoji Battery Charging," which catches the search demand TikTok tutorials have built up over three years: "iPhone emoji battery" how-to videos that have racked up 2023M and 7.76M views in 8.45 alone (TikTok, checked 11-06). It has held the #1 spot in its category's Top Free chart for a long time, and that likely brings in some organic installs (inferred).

Peers heating the category together. Vietnam's LUTECH has a product with 20M installs on Android, and in the same period it was running "Football emoji battery" creative on European TikTok (TikTok ad library, 10-29 to 11-04). The demand was built up by several paid acquisition companies at once.

Where the money comes from

Free to download, with money coming in three ways: interstitial ads (nearly every review mentions them: "every tap is an ad," "I have to watch an ad even after I exit the app"), watch-an-ad-to-"temporarily unlock" themes, and subscriptions ($4.99/week, $29.99/year, per the US store page).

It barely appears on the grossing charts: only #40 in Bulgaria's category grossing chart and #77 in Uzbekistan. Subscription revenue is probably small, so ads are likely the main monetization (inferred). It's an arbitrage business where the money from each user is less than the ad money earned before that user uninstalls. Retention and reputation were never on the books.

Who is behind it

Hypernova has 6 apps on iOS. The other three follow the same million-download pattern: the smiley live wallpaper Silly Fun Smile Live Wallpaper (52,962 ratings worldwide), ThemeArt (28,891) and Walliz (12,658). On Android, Smiley Fun Live Wallpaper has about 11.4M installs (App Store / Google Play, early Nov). The store page lists 30 languages, and the privacy policy is hosted on a Google Sites page at leansoft.io.

But "30 languages" is only what the store page claims. Reviews from Japan, Taiwan and Turkey complain "no Japanese," "no Traditional Chinese," "no Turkish," and one Japanese user says the interface is "mostly Vietnamese or Chinese." The creative and ad buying run like a production line, and the app itself was clearly rushed out.

Why this one, and why now

• Android validated the demand first. In 2026 an entire "Emoji Battery" category appeared on Google Play: New Widget Co.'s Emoji Battery Icon Customize (listed in April) has about 15.6M installs, ZAppsolution's app of the same name (March) about 12.7M, and several others around 3M (Google Play, early Nov).
• There are no big players on iOS. The iOS apps with the same idea (Emoji Battery Widget, BunnyWatch, Amoji, BatMoji, Wattlings) are all tiny indie projects, 2025–2026 years old, with a few hundred to 1.5K ratings in the US store. The veteran Charging Animation & Wallpaper (2021 years on the store, about 47K ratings in the US store) doesn't sell on emoji at all.
• It buys ads. A creative factory, IP bait, and multi-country rollout at once. Peers took a year to spread a category like this. It did it in two months.

The product itself has no differentiation, and it can't even match the core features of its Android counterparts. It took off because of distribution.

Who's competing

If it were you

Verdict: worth studying, not worth copying. What you can learn is the selection method: a category that blew up on Android and has no big player on iOS is a line you can reuse. But this particular category can't deliver Android's functionality on iOS to begin with, a paid acquisition factory already holds the top spot, and a string of same-name copies sit behind it.

Who it suits: small teams already running paid acquisition for utility or wallpaper apps, with existing ad monetization and a creative pipeline. Treat it as one SKU in a product portfolio, launch fast, and shut it down if it doesn't work.

Who it doesn't suit: indie developers who have never run ads and are counting on organic store traffic. All the volume here is bought; organic is just the edge that charts bring. Trying to win by "doing it better" and collecting subscriptions isn't realistic either, because users arrive for a wallpaper, not a tool they'll keep using long term.

How to do it: don't copy it directly, do the part it does badly. First, make the IP real. What draws people in the ads is Dragon Ball, NFL, soccer, and horror-movie characters, none of which are in the app. Licensed teams, clubs and anime merch, or your own original character series, turned into theme packs that really exist: whatever the ad shows, the app has. Second, do localization properly. Users in Japan, Taiwan and Turkey are complaining about missing native-language interfaces, and it hit #1 in Japan's category, so the demand is there. A version with a real Japanese interface could capture those frustrated users directly (inferred). Third, be upfront that it's "wallpaper + Shortcuts charging animation," and turn the Shortcuts setup into a one-step guide, so you take fewer "false advertising" one-stars.

How to acquire users: follow its playbook. Run vertical short-form video on TikTok and Meta, one theme per creative, timed to moments: Halloween is over, so next come Christmas, New Year, Valentine's Day, and the 2026–27 soccer and NFL playoff seasons. The difference is that everything in the creative has to actually exist in the app. Test in one or two countries with a small budget first, and check whether cost per install can be recovered from ads and subscriptions. If not, stop.

Deadline: holiday themes need to be live and approved by early December to catch Christmas. This wave of interest was ignited by several paid acquisition companies together. Once they stop spending, search volume will drop, so the window is probably measured in months (inferred).

Signs you've misread it: ① Hypernova's active TikTok ad count keeps falling below a few hundred while its chart rank also drops, which means the arbitrage no longer pays. ② If Apple one day opens up customization of the status bar or lock screen charging animation, every iOS "approximation" loses its point. ③ The reverse: if an iOS same-name copy with little ad spend keeps steadily gaining ratings, natural demand is bigger than it looks, and it's worth building seriously.