#26 on Italy's Entertainment chart, right next to Paramount+: Calyssa is one of 20 short-drama apps built by a single developer in Hanoi 4

Calyssa is a free Android short-drama app that launched on Sep 11 and hit 729K installs in two months. In Nov 6 it ranked #26 on Google Play's Italy entertainment free chart. Its content and features are indistinguishable from dozens of similar apps. What made it climb is the playbook of a small Hanoi studio: one template reskinned into about twenty brands, concentrated paid acquisition, targeting countries where ads are cheap, and recouping through rewarded ads. Below, we break down how this works and whether it's worth copying.

Nov 6 entertainment chart, Italy

On Nov 6, the top four on Italy's Google Play entertainment free chart were all short-drama apps: FreeReels, NetShort, ReelShort and DramaWave. Below them were Prime Video, Netflix, Disney+ and HBO Max. At #24 was YouTube Kids, #25 was Paramount+, and #26 was Calyssa, with 729K total installs, two to three orders of magnitude fewer than the names above it. Right behind it at #27, DramaMask, is also a short-drama app with under 1M installs.

It climbed fast: on Oct 31 it was at #181, Nov 1 85, Nov 3 28, and by Nov 5 it peaked at #22 (Google Play charts). On the same day it was also on the entertainment free charts in Spain (95), Hong Kong (105) and Mexico (124), and France (179). It never appeared on the US or UK charts, nor on the Top Grossing chart.

Its reviews tell a different story: 199 ratings averaging 2.0 stars, with 132 of them at 1 stars (Google Play, 11-06). With 729K installs it has only 199 ratings, roughly one rating per 3,660 installs. Normal apps usually see one rating per hundred or two hundred installs.

What it is

The store page pitches it as "romance short dramas, delivered like letters you open one at a time": about two minutes per episode, vertical, swipe up for the next one. Tags include revenge, enemies to lovers, hidden identity and reunion, and the interface supports 22 languages.

The store page is clear about monetization: the first few episodes of each show are free, later ones are locked and unlock by watching a rewarded ad or spending coins. Coins can only be earned by watching ads, not bought. One rewarded ad removes other ads for 10 minutes. Ads also run between episodes. There are also VIP weekly, monthly and annual passes that remove ads and unlock everything. The store shows no in-app purchases, so subscriptions are likely not live yet or have very low volume (inferred). It's basically an app that earns through ads.

The store page only says the shows are "provided by their respective rights holders". We couldn't find whether that means licensed distribution or some other source.

Who's behind it: 4 people, 166 apps

The developer account is "ManhNhe". The operator named in the privacy policy is Tranquil Mind Technology, a Hanoi joint-stock company.

The company's About page explains its origins: it started with a meditation and sleep app called Dreamland: Sleep & Relax (now BlissLand), then became a studio that handles everything "from product design to monetization". The team lists 4 people: Tommy Nguyen (studio lead, handling ASO and monetization), Andy Cao (product design), ConMaNgangQua (engineering and release automation) and ManhNhe (engineering, plus "Ad Operations"). Developer accounts use member names directly: Calyssa sits under ManhNhe, and another short-drama app, Marquisse, sits under AndyCao.

The homepage numbers: 166 apps published, 25+ languages, 8 categories. Capabilities listed include "AdMob + Meta + multiple ad network SDKs", "daily revenue tracking", "standardized store assets, auto-generated privacy policies, multi-region release", and "8 confidential partner brands".

On Google Play, 24 apps with package names starting com.tranquiltmt or com.tranquilmind can be matched. They're spread across 6 developer accounts, and 19 are short-drama apps, most launched in 8 and September. Installs (Google Play, 11-06):

Across the whole matrix that's about 7M installs. These apps swap out the "persona" in the name, icon and description; Calyssa is the "letter-opening" one, but the functionality is the same. Calyssa is the fastest-growing of the September batch.

Where the users come from: bought in waves

The install curve jumps in steps (AppstoreSpy estimates): Oct 6 cumulative about 920, Oct 8 about 19k, Oct 12 about 228k, that single day alone adding nearly 200k; Oct 17 about 497k. In about ten days it went from one thousand to half a million, then settled to a daily one or two tens of thousands. Word of mouth doesn't grow like this; this is concentrated ad buying.

The visible ad-buying evidence is on Meta. A Facebook page called "Free Dramas You Can't Miss" started running ads in Sep 19; by Nov 4 it had 323 ads running, 2,517 total, all video, placed across Facebook, Instagram, Audience Network and Threads (Meta Ad Library). The landing pages that could be matched all point to sibling app Plotwist, with one line of copy in different languages: "Download Now & Watch FULL Episodes for FREE!", Spanish "¡Descarga y mira episodios COMPLETOS GRATIS!", Arabic "نزّل الآن وشاهد المحتوى كاملًا مجانًا!" (download now, watch the full thing free). The only selling points are "free" and "full".

Calyssa's own ad creatives didn't match, so where it ran ads and how much is unverified. But with the same team, the same playbook, the same Spanish and southern European targeting, and the same stepped curve, it's very likely also buying paid acquisition (inference). Installs and ratings 3,660 vs 1 with an average of 2 stars also look like low-priced volume from programmatic ad networks: tap an ad, install, watch two episodes, leave.

Almost nobody talks about it organically. Searching "Calyssa" on X returns 0 posts, TikTok has no official account or creator content, and the only results are auto-generated pages from APK download sites.

Where the money comes from: ad revenue has to exceed acquisition cost

The math of this business is simple: the money one user brings in by watching ads has to exceed what you paid to acquire them.

Short drama is a natural fit for this math. Each episode is two minutes and ends on a hook, a perfect slot for a rewarded ad; a series has dozens of episodes, so you unlock dozens of times. The privacy policy lists six ad networks: AdMob, Meta Audience Network, Pangle, Mintegral, Unity and Liftoff, with Adjust for attribution and RevenueCat for subscriptions. Multiple networks bidding together fill better in places like Latin America, southern Europe and the Middle East.

This also explains why it shows up in Italy, Spain and Mexico but not the US or UK: an install is cheap in those markets while ad prices are still acceptable (inference). Its only recent update note is "smarter retry handling for verification issues". The privacy policy also mentions Talsec tamper protection and Firebase App Check, suggesting it's worried about its content being scraped and its ads being fraudulently clicked.

Whether it actually makes money can't be seen. A rating of 2.0, with two-thirds at 1 stars, suggests retention is probably very poor; the sharp rise in mid-October followed by a drop may mean budgets are being adjusted based on payback (inference).

Who it's competing with

New entertainment apps on Google Play with drama or reels in the title: 26 new in June, 33 in July, 67 in August, 54 in September, 43 in October. Calyssa is just one from this summer's wave.

This playbook isn't a secret in the industry: a Chinese going-global community's short-drama rankings already list more than a dozen brands from this studio, including Plotwist, Chapture, Slatora and Dramio; Vietnamese media VietnamNet and VnExpress reported from September on short-drama apps gaming the charts and on free short-drama apps hiding ads or even malware; and outsourcing firms openly sell "short-drama app development for Vietnamese studios".

Where it falls short

• The product itself: 2 stars, with 1 stars making up two-thirds. Nothing about the content or experience gives users a reason to remember the name "Calyssa"; to users, swapping the skin makes no difference.
• Content source: waved off with "provided by the respective rights holders". If the content is judged to be scraped, pulling the whole matrix at once is the biggest variable risk.
• Only seen on Android: these short-drama skins have so far only been seen on Google Play; whether they're rolled out to the same extent on iOS is unverified.

If it were you

One-line verdict: you can learn a pipeline of "multi-brand packaging + paid acquisition + rewarded ads for payback", but copying it into short drama, a slot that's already crowded, isn't worth it.

Who it suits: small teams that already have paid-acquisition and in-app-ad (IAA) experience, can run aggregated multiple ad networks, have test budget they can afford to lose, and have a clean short-drama content source (licensed distribution).

Who it doesn't suit: indie devs who've never bought users; people trying to grow through product and word of mouth; people who can't get clean rights and can only "put up some shows".

What to do: don't build an 21th free short-drama skin. It's more worth carrying the method into content categories that aren't crowded yet: audiobooks, interactive fiction, comics, or localized web-novel adaptation videos using the same "one hook per episode, unlock with ads" model; or stay in short drama but focus on one smaller-language market (such as Turkish, Arabic or Indonesian), with content and subtitles good enough that locals willingly leave good reviews. In a multi-brand template, add budget to whichever brand takes off in which country.

How to acquire users: Meta video ads and programmatic ad networks, with creatives made from the most intense ten-odd seconds of the show plus one line, "watch the full thing free"; start with low-CPI Latin America, southern Europe and the Middle East, and avoid the US and UK.

How early you need to be: in the short-drama IAA slot, big players (FreeReels, DramaWave, Melolo, TikTok's PineDrama) already hold the top spots, and the Vietnamese matrices started shipping in batches from August. To run this playbook elsewhere, move before other content categories get filled by the same kind of matrix in the first half of 2027.

What would show you're wrong: if these matrix apps are widely pulled in the next month or two, or Calyssa's and Plotwist's installs stop rising, or the number of live ads on the Meta pages falls to single digits, that means ad revenue isn't covering acquisition cost, or the content rights have a problem, and this path is narrower than it looks. Conversely, if they keep increasing spend into early 2027 and new brands keep appearing, the math works, and it's worth seriously working out your own CPI and ARPU.