Two birthdays make one full moon: how a love-test app with 250k installs and zero ratings was "bought" into existence

Moonly Match: Love Test is a Google Play app where you enter two birthdays and see whether the moons from the nights each person was born can line up into a full moon. Six weeks after launch it has 250k installs and not a single rating. No one discovered it. A Vietnamese studio bought it in, copying a playbook that someone else had already proven. Anyone who wants to follow it should first decide whether they're following a mechanic or a paid-acquisition business.

A 38k-view video, and a format that had already peaked

In Oct 14, TikTok user @joanajamshidi posted a video with a single caption: "search 'moon phase' + your birthday to find yours". Go search "moon phase + your birthday" and see which one you are. By early November it had about 38k views. On Nov 3 and 4, an account selling decorative prints, @lqyu_773, posted two videos in a row: "your birthday moon + their birthday moon = a full moon", gold for the first person, silver for the second.

This isn't a new idea. Around 2023 March, the TikTok "Moon Phase / Moon Birthday" effect took off: if two people's birth-day moon phases complement each other and make a full moon when put together, you're "soulmates." Farmers' Almanac's hashtag clocked over 430M views, and Teen Vogue, Today and Mashable all covered it. People keep coming back to search for it every year, and free web tools like moonsoulmate.com and moonagetoday.org are easy to find: enter two dates, get a result.

Moonly Match just moves this into an app.

What it is

The store page is blunt: "Pick two dates, reveal two moon phases, see how your cosmic patterns fit together." Besides the moon phase comparison, it packs in a few similar things: couple compatibility tests, friendship tests, and couple ranking mini-games like "Who falls in love first? Who gets jealous easier? Who gives the best gifts?" Results come as nice cards you can save and share. The footer has a disclaimer: "For entertainment only, not a scientific measurement."

No in-app purchases, only ads (the Google Play page is labeled "Contains ads"). Version 1.0.3, privacy policy hosted on Google Sites. One person could build it in a few days.

Numbers: 250k installs, zero ratings

Google Play installs and chart positions as of 11-06; data before mid-October is third-party estimates.

Daily installs went from about 4,000–5,000 in mid-October to over 10,000, up to 27,000 a day around 10-21–10-31, then fell back to about 6,000 a day in early November. This isn't a video going viral and a long tail trailing off. It's "ramp up, push harder, pull back."

The strangest part is the ratings: 250k installs and the rating count is empty, with 0 reviews. An app with that many organic users should have hundreds of ratings by now. It only charted in three countries (UAE, India, Saudi Arabia), all markets where installs are cheap and the entertainment category is easy to crack.

Where the users come from: bought, inferred

We haven't seen its ad creatives, so what follows is inference, but the evidence fits together and is hard to explain any other way:

• Big install count, zero ratings: bought cheap traffic rarely comes back to leave a rating.
• Charts only in cheap countries: #13 in UAE Entertainment needs only a few thousand installs a day (estimated). Once charted, it picks up some organic installs on top.
• Stepped jumps, on the same days as sister apps: the same studio's budgeting app MoneyFlow went +172k over 7 days, and short-drama app DramaGo went +105k over 7 days, both jumping on 10-31 and 11-03. That looks like one acquisition team scaling up in sync.
• Pure ad monetization: buying an install for a few to a dozen cents and running interstitial and rewarded ads around the result page to earn back the spread.

Searching TikTok for "moonly match" or "moon phase couple app" turned up no video promoting this app in the past 30 days; nobody discusses it on X, and no media has written about it. The moon phase trend on TikTok is the demand base, not its channel.

Who made it: an app factory

The developer entity is VIGLAFICO JOINT STOCK COMPANY, a Vietnamese company. The developer website points to vionyx.co, which describes itself as a "Missouri-registered mobile product studio." On Play, it has published apps under at least five Vietnamese entities, all with com.vionyx.* package names: 9, and in October alone it shipped short drama (DramaGo, DramaReels, DramaVibe, DramaBinge), budgeting (MoneyFlow, MoneyCove, Moni), and moon phase matching. Its website also lists tarot, AI chat, VPN, step counting, speaker cleaning, and pregnancy apps.

It has put out two apps for the same moon phase concept: 9-23's Moonly Match, and 10-11, which it published under another entity (VIONYX TECHNOLOGY JSC) as MoonPhase: Couple & Soulmate (11-06, around 50k installs, +40k over 7 days). One concept, multiple brands: a standard way for studios like this to dodge bans and test creatives.

Who it's copying: the pioneer, three months earlier and six times bigger

The first to really run was MoonPhase Match: Couple Test, from another Vietnamese company (VINH PHUC HIGH TECH JSC), launched in June 15. It passed 500k in August and a million in October. 11-06 has 1.51M installs, +132k over 7 days, and 693 ratings, and it also charted in the UAE, India and Singapore Entertainment charts. The two store descriptions use nearly identical copy. Vionyx followed after seeing it work.

And Moonly Match itself has been copied:

At least five apps use the same concept; two copy or trade on its name directly. The name itself is borrowed too: there's an old moon phase app on Play, launched 2021 years ago, called Moonly (3.85M installs).

Differentiation is essentially zero. It worked by picking fast, buying traffic with careful math, and having many entities.

Where the money comes from

Ads only. Revenue isn't disclosed and nobody has posted about it. A pure entertainment test app people use once and leave won't have high lifetime value (LTV). Whether it breaks even depends entirely on the gap between acquisition cost and ad eCPM. Traffic was pulled in early November, which could mean the pool stopped paying off, or could just be a normal creative swap. From the outside, you can't tell.

The other money path isn't in the store. The endings of @lqyu_773's two videos say "search QingCozyPrints", which sells decorative prints showing a couple's birth-date moon phases. On Etsy, "couple moon phase print" is a whole category, with custom versions at $30 shipped free by the dozen. The same emotion is worth a few ad impressions in an app, but as an anniversary gift it's a sale of several dozen dollars.

If it were you

Verdict: C. You can learn a method for picking products and buying traffic from it, but this particular app isn't worth it. The concept peaked three years ago, free web versions are everywhere, and five or six Vietnamese studios are already buying traffic for the same concept on Play. You have nothing they don't have.

Who it suits: small teams already running "tool / entertainment app traffic arbitrage," with an AdMob account, the skill to run Google UAC, and the ability to work out the gap between CPI and eCPM. For you, this is just one more topic to test, one variant every week or two, a small budget aimed at the UAE, India, Saudi Arabia and Southeast Asia, and stop if it doesn't pay back.

Who it doesn't suit: anyone who can't run paid traffic and hopes content or store search will bring in organic installs (250k installs with zero ratings shows organic traffic is almost nonexistent); anyone who wants to build a subscription on it (one-time curiosity doesn't retain); anyone who wants to beat them with a "prettier moon phase test" (product quality isn't the deciding factor here).

How to do it: if you do touch this concept, don't make a seventh copy. Two directions are worth more. One: treat it as a lesson in picking traffic-driven products. Go through old viral TikTok trends and pick ones with simple input, shareable results, and replayability. Then check whether Play already shows someone running the stepped installs, zero ratings and cheap-country charting pattern. If so, the hook is buyable, so ship variants fast. Two: change how you get paid. Turn the same "two moons make a full moon" idea into a website where the result page sells a custom memento print or digital print (around $30 each on Etsy), timed for Valentine's Day.

How to get users: the app route is paid traffic, with Google UAC pushing cheap countries up the Entertainment charts. For the print route, use vertical TikTok videos along the lines of "your birthday moon + theirs = full moon" to sell, and put the shop name in captions like @lqyu_773 does. Add budget before anniversaries and Valentine's Day (inferred).

When to move: the app route has no hard deadline, but every week you wait is another clone. For the print route, you need to test creatives by mid-January 2027 to catch the February 14 window.

What would mean you read it wrong: ① If the pioneer, MoonPhase Match, or Moonly Match is still adding over 100k installs a week after November and starts collecting hundreds or thousands of real ratings, it has organic retention and not just bought traffic, so reassess. ② If installs drop to zero and the app is delisted once Vionyx stops buying, the traffic didn't pay back, so don't follow the paid route either. ③ If TikTok releases an official moon phase effect and the hashtag blows up again, the window reopens, and whoever moves fast can catch some organic traffic.

Data and sources

• Installs, charts and ratings: Google Play pages and chart data as of 2026-11-06; curves before mid-October are third-party estimates (AppstoreSpy).
• Store copy: Google Play pages for Moonly Match: Love Test and MoonPhase Match: Couple Test, 11-06.
• Developer: vionyx.co official website; developer entity pages on Play.
• Origin of the concept: Today, Teen Vogue and Mashable coverage in 2023; Farmers' Almanac (hashtag views 430M+).
• TikTok videos: @joanajamshidi (10-14), @lqyu_773 (11-03, 11-04); view counts as of 11-06.
• Etsy "couple moon phase print" category page, 11-06.
• Traffic purchasing, payback, and Vionyx's ad channels are all inferred; we haven't seen any ad creatives.