A "ghost-hunting" app listed for 18 days cracks the 19 charts: nothing new under the hood, just a playbook

An Android app called EMF Finder, listed in Oct 19, reached 6k cumulative installs by Nov 18.6 and charted that same day on the Google Play free Entertainment charts in 19 countries. Its features are identical to a dozen older Play apps that have reached millions of installs, and nobody online is talking about it. It took off by picking the right season, pushing across many countries at once, and monetizing through ads; the developer account also looks borrowed. The playbook is worth learning, but this app itself isn't worth copying.

A one-star review from Nov 5

On Nov 5, a US user named Amber Meece left this review of EMF Finder on Google Play:

I keep trying to exit out of an ad & it keeps asking me if I want to visit the ads website. app also restarts the language setup after I already did that. Also it opens 2 windows like its opened twice.

(I keep trying to turn off the ads, and it keeps asking if I want to go to the ad's website. I already picked my language, and it makes me pick it again. It also opens two windows, like it launched twice.)

The same day, a Brazilian user wrote: "Can't use it at all, so many ads I can't even open the app." An Indian user mixed English, Hindi and Marathi to curse it out with a very crude idiom. That day its cumulative installs rose from 7,102 to 10,898, then added 7,710 the next day (Google Play installs, 11-04 to 11-06).

The angrier the reviews, the faster the installs. That's how this kind of app works: the ad money is already in the bank the moment the user installs.

What it is

The function fits in one sentence: it taps the magnetometer the phone already has, draws the readings as a gauge called "EMF Scan"; the same reading in a different UI is called "metal detector"; then add history logs and theme switching. Free, ad-supported, no in-app purchases (store page, 11-06).

The name reads the legit "EMF Finder - Metal Sensor," but the package name hides ghostdetector, and the category is set to Entertainment, not Tools. It's trying to capture both ghost-hunting searches and metal-finding searches.

How fast it rose

Google Play public data, 11-01 to 11-06. 11-06 It charted on the free Entertainment charts in 19 countries, best in Turkey at #24, Canada at #37, Australia at #52, and the US at #57. In the US it jumped from #173 to #57 in a single day; in Turkey, from #90 to #24.

Two things look off:

• The ratings sit at both extremes. When ratings first became visible there were 49 reviews, all 5 stars; newer ones are almost all 1 stars, with almost nothing at 2 or 4 stars. The early five-star wave looks staged, and the later reviews come from real users (inference). The store page now shows 11-06 at 3.5 stars.
• 19 countries rising at once. The US, Canada, Australia, UK, Turkey, Mexico, Nigeria, India and Saudi Arabia all charted the same week. Nothing about it shows up on TikTok, X or in the news, and a single viral video couldn't spread this evenly. The likelier explanation is paid acquisition bought country by country (inference; we didn't find which channels the ads ran on).

Who's behind it: an account that doesn't add up

The Play developer is TRULY FLAVIUS GROUP. Searching the name turns up a small US company that offers life-transition and faith coaching for women over 40. But the store page's "About the developer" lists an address in Wervik, Belgium, which matches an amateur theater company's name, with a US phone number and a Gmail support address.

The same account holds 5 apps: one tied to that coaching business (inferred to be used for account verification), and four more covering EMF detection, tarot/zodiac, voice-activated lock screens, and AI photo editing, all categories that recoup through paid acquisition on Play. The tarot app, listed Oct 16, already has 27.7k installs and first charted in 11-06. The website and privacy policy sit on a randomly generated Netlify subdomain, and the privacy policy was copied from a game template, with "the Game" throughout.

Add the review complaints about "choose your language on open" and "tapping ads jumps you to a website," and this looks like a template-tool studio batch-publishing apps through a purchased or rented, already-verified company account (inference). The benefit is skipping the closed-testing gate that new personal accounts must pass.

Where the money comes from

Ads only. No in-app purchases, no subscriptions. The reviews about "ads the moment you open it" and "an ad on every tap" mean app-open, interstitial and native ads are all on. The model: earn back the cost of each install from the few ads each user sees. Revenue isn't public and can't be estimated from outside.

Who it's competing with: the category is already crowded

The only difference between EMF Finder and them is the keyword in the package name and the launch date. It's the copycat itself. What this table really shows: demand for this category keeps showing up every year, and template apps launched in 2026 still hit the million mark.

Another route is also being walked. On iOS, a paid paranormal app called Ghost Science M3 was picked up in Oct 26 by paranormal creator paranormalpeterson, who scanned a "haunted hotel" with it. That TikTok got 1.08M views (TikTok, 11-06). The same creator's September video made with another LiDAR ghost app pulled 1.32M views. Those who take the "true believers" route rely on content, not paid acquisition.

Why it's blowing up now

1. Seasonality. Launched in Oct 19, right before the Halloween ghost-hunting search peak. The same-category Ghost Detector Pro Radar gained 410k that week.
2. Multi-country push. Daily new installs went from 2,000+ to 7,000+, with 19 countries charting at once (inferred to be paid acquisition).
3. Smart category pick. Entertainment has a low bar on free charts in small countries. With under 20k installs it reached the top 25 in Turkey and the top 60 in the US.
4. Seeded reviews. The first 49 reviews were all 5 stars, helping a new app hold its store-page conversion through the early stage (inferred).
5. Ready-made account. Launched under a verified company account, skipping the wait and review for a new account (inferred).

Not one of these came from the product itself.

If it were you

Bottom line: there's little to learn from this app as a product. What's worth taking away is the playbook: an old category, timed to a holiday, cheap multi-country paid pushes, and a low-competition category. What's not worth doing is shipping yet another EMF detector. Halloween is over, and the category already has several old apps at tens of millions of installs. Its real advantages (ready-made accounts, templates, paid-acquisition know-how) belong to the studio, and you don't have them.

Who it suits: small teams that have already shipped ad-monetized utility apps on Play, can run Google App Campaigns, and have a verified developer account. For you this is a warning, not an opportunity: seasonal categories can go on the calendar early.

Who it doesn't suit: indie devs who've never run paid ads and want to grow through organic store search, or anyone aiming for long-term reviews and retention. This playbook gets you "only 1 stars and 5 stars," with a lifespan measured in weeks.

How to do it: if you want to build something different in this space, don't compete on "yet another template." Go after what nobody does well: paid tools for people who truly believe in the paranormal. Learn from GhostTube and Ghost Science M3. Features that make good video, like a voice box, LiDAR scanning, and readout overlays on recordings, sell well. Use a one-time purchase or subscription, with few ads. Prioritize iOS, where this audience is willing to pay.

How to get users: find paranormal creators on TikTok and have them take your app to places they say are haunted. Someone like paranormalpeterson, with a single video at a million views, is worth a week of paid acquisition in one post. Post your own investigation videos every week, and make sure the app's interface and readings moving on screen are visible.

When to be ready by: finish the product in mid-September of 2027, start getting creators to film in early October. This year's Halloween has passed, and these searches will drop after November. Use the gap to polish the product and build up video footage.

Signs you've read this wrong: ① if EMF Finder is still on multi-country charts in late November with daily installs flat, then these apps aren't just riding Halloween and can pay back paid acquisition all year, so the template route is worth recalculating; ② if it and the same account's tarot app both get delisted within a month, the account-borrowing route is being shut down, which makes template studios harder to run and is actually good news for people building real products; ③ if no app hits a million views on paranormal creators' videos next October, then the content route isn't that wide either.