A choir practice app for a church choir: one person, one TikTok account, installs up from 650 to 5,000 over two months
What it is A bilingual sheet-music app for choirs of the "Light of the World" church (LLDM / TLOTW). Each song can be played by soprano, alto, tenor, and bass parts separately, so members can learn their own part at home.
Why it took off The developer runs a TikTok account and posts a part-by-part hymn tutorial almost every day. The videos themselves are practice material choirs need, so they get forwarded into choir group chats. The established competitors had stopped updating.
CHow you could follow it Don't target this church. Copy the playbook: if you're already in a choir or choral community, build a part-practice tool for it, post the demo videos to TikTok daily, let comments pick the songs, and use giveaways to get people to share with their groupmates.
- Data (updated daily) · first launch 2026-07-09 · 11-07 installs 5,088
Android · Total installs worldwide Data 2026-10-29 → 2026-11-07 (10 days, 10 observations). Google's detail page only refreshes install counts every other day, so a flat day doesn't mean nobody installed.Android · Ratings count (cumulative) Data 2026-10-29 → 2026-11-07 (10 days, 9 observations)
An indie developer in Tijuana, Mexico, built an app for the choirs of the "Light of the World" church (La Luz del Mundo, abbreviated LLDM, known in English as TLOTW). It lets you read sheet music and practice harmony parts. After launching in July, it had almost no users for two months. In September, he opened a TikTok account and began posting a part-by-part tutorial for a hymn every day, and installs started climbing. The ceiling for this business is low, but its playbook can be copied as is: find a closed community that rehearses together every week, and let the tool produce the content.
A comment: "I'm about to perform on stage for the centennial celebration"
In 2026 Sep 17, the TikTok account @lldmcoroapp posted an app introduction: "1,600 digital score sheets, 600 songs with part-practice audio (soprano, alto, tenor, bass), free to download on Google Play and the App Store." By 11-06 the post had 20.5k views and 334 shares. Two days later a comment read:
"Really? Now I can listen to the songs I have to memorize for choir. I'm about to perform on stage for the centennial celebration."
Another: "Finally, an app for choirs!" And one used church in-house language: "Dios les pague (God reward you), this tool is so useful for us."
2026 marks the church's centennial. It has a large following in Mexico and the US, every congregation has a choir, choirs rehearse weekly, and new songs get drilled before big gatherings. Members struggle most with memorizing their own part, which is exactly what this app sells.
What it is
On Google Play it's called "Tlotw Choir - Coro LLDM," launched in Jul 9; on iOS it's "Coro LLDM - TLOTW Choir," launched in Jul 24. The developer, Huri Tolentino, works alone.
- The store listing says 304 English score sheets, 1,333 Spanish score sheets, 234 English practice audio tracks, and 345 Spanish practice audio tracks.
- You can listen to any single part of a song or the full choir. There's also speed control (0.5–2x), a metronome, annotations, and it works as a music player with the screen off.
- Individual parts can be exported as MP3 and sent to WhatsApp groups.
- In Oct 21, "live-singer part recordings" launched, the first 156 songs.
Viewing scores is free. Premium unlocks unlimited practice-audio playback, unlimited exports, and no ads: on iOS in the Mexican store, monthly MXN 39 (about $2), yearly MXN 179–199 (about $10). The Play IAP range is listed as $1.99–19.99.
Why it started after September
The install curve has a clear inflection point (cumulative Google Play installs; before 10-28 these are third-party estimates, averaged by week):
| Date | Total installs | Approximately how many per day in that period |
|---|---|---|
| 07-28 | 108 | 8 |
| 08-25 | 348 | 14 |
| 09-22 | 650 | 8 |
| 09-29 | 1,391 | 106 |
| 10-27 | 4,134 | About ¥100–175 |
| 11-06 | 5,088 | +952 over the last 7 days |
Before Sep 22, it was about ten installs a day. The TikTok account opened Sep 16, and a week later daily adds were around 100. By 11-06 the account had posted 48 videos and 3,421 followers.
Every video follows the same format: a church hymn, sheet music scrolling with the music, four part audio tracks layered together, a caption crediting the author and arranger, and an ending with download links for the App Store, Google Play, and the website. The most-viewed videos on TikTok (11-06):
| Date | Item | Views |
|---|---|---|
| 09-16 | An old hymn commemorating church history, asking "Has your choir ever sung this?" | 26k |
| 09-20 | "Por Tu Elección," asking "Which one do you want next?" | 33.7k |
| 10-09 | "Guerrero Celestial" | 32.3k |
| 10-18 | "Cuando Oí su Voz" | 25k |
| 10-22 | "Valle de los Huesos Secos" | 21.3k |
These videos don't look like ads. They are practice material choirs actually need, so they get forwarded into choir groups. The comments under the 09-20 video are almost all song requests and memories: "My childhood, my youth," "This is my favorite, no choir sings it anymore," "Does anyone have the soprano part for this?" The developer made the next videos from the songs requested in the comments, which effectively set the content schedule.
The second jump came in late October, the same period as the "live-singer part recordings" launch and two more videos that got over 20,000 views. Comments on the update video said "10/10 la app" and "This is what an app should be."
What else he did
- Giveaway, entry requires forwarding to choir mates. Launched in Sep 23, with 3 spots. Prizes were two things: 1 year of Premium, plus "you pick a song and we turn it into part recordings." To enter, you follow the account, answer "What made you join the choir?" under the video, and forward the video to your choir brothers and sisters, who like your comment. The top 3 most-liked entries win. One person tagged ten people in a single comment. The video itself only got 1,874 views, but it pushed the app into choir-internal sharing chains.
- Public roadmap. In Oct 1, he announced 10-14 piano part recordings for 80, and live-singer recordings for 10-28, then posted update notes in 10-14, 10-21, and 10-22. Users had a reason to come back.
- Moving his old web users over. He had previously built an internal sheet-music library for choirs in Baja California. The website now reads "The web version will stop being supported, please download the official app."
- Expanding into "church tech." In Nov 5, he released Proyector LLDM, a free open-source church projection system that combines hymnals, choir songs, the Bible, and OBS subtitle overlays in one interface.
No sign of paid ads found (not finding any doesn't mean none were run). The app has ads in it, and one review says "the ads in this app are weird."
Who it's competing with
LLDM choir apps are not a new category. At least 6 others are already doing it:
| Product | Scale | How it differs |
|---|---|---|
| Coro LLDM(com.lldmchoirappfree) | 50k+ installs, 841 reviews | The leader in this niche also splits voice parts, but it hasn't been updated since 2025-10, and user feedback says the audio won't play. |
| Coro LLDM (goland, Colombia) | 10k+ installs, 4.6 rating | Just a PDF score binder with no vocal practice audio, and no updates since 2026-03 |
| Mi Coro - LLDM(Ismael García) | iOS: 100 ratings, 4.9 stars; Android: 500+ (self-reported) | Launched in August, same period as this app. More iOS ratings than it, and it grew through Facebook promotion. |
| Coro LLDM Pro and a few others | Hundreds to thousands | One-time purchase or no longer updated |
It broke through because the older products stopped updating and left a gap, and its content has one more layer than the rest: the others only show the score, while this one lets people learn their own part at home. Per-voice audio is what makes its videos possible, and TikTok solved how users find it. Before September it had features but no content, and only about ten installs a day.
How much money
Revenue isn't public. 5,000 installs in a small religious community, at $2/month or $10/year, which suggests monthly revenue in the few-hundred-dollar range (my estimate). The ratio of ratings to installs is about 1.5%, far below typical utility apps, which suggests most installers are real users. It only reached around #100 on the Books & Reference free chart in Mexico's Google Play, and never charted overall.
Almost nobody outside the community knows it. No mentions on X in nearly 30 days, and no media coverage.
If it were you
Verdict: This app itself isn't worth chasing. The LLDM choir niche already has 6 apps, and it only makes a few hundred dollars a month. What's worth taking is the playbook: find a closed community that rehearses weekly with new songs coming out constantly, build a practice tool, and post demo videos made with the tool on TikTok every day.
Who it suits: People already inside a religious or choral community, who know its songs, speak its internal language, and can get scores and arrangements. Communities you could swap in include: LDS (Mormon) choirs, evangelical church choirs, church choirs in Korea and the Philippines, amateur choirs in various countries, and gospel choirs in Brazil and Africa (my inference; I haven't verified whether similar products exist for each).
Who it doesn't suit: Outsiders. These communities trust "their own people." The developer greets users with "La Paz del Señor" and "Dios les pague"; an outsider doing the same loses that trust. It also doesn't suit anyone hoping to make a living from it. A single sect's choir tops out at a few thousand to tens of thousands of users. Also know that LLDM is controversial: its current leader pleaded guilty in the US to sexually abusing minors in 2022 and is serving his sentence, and the hymn lyrics in the videos sing his name. Building a tool for this sect means your name gets tied to it.
How to do it:
- Build the smallest version first: the score, separate audio for each of the four voice parts, and export to share on WhatsApp.
- Viewing scores is free; unlimited audio and export go in a subscription of about $2–3/month or $10/year.
- On rights: hymns and choral arrangements are mostly internal works of the community, so before launch, check whether the authors and arrangers allow use. How this app handled it isn't public (unverified).
How to get users:
- One song per video: a scrolling score with the voice part highlighted, captions crediting the author and arranger, and the download method at the end.
- In the comments, let people request songs, and make the next videos from the requests.
- For giveaways, offer "a year of membership + voice parts made for the song you pick," with the entry condition set as "forward it to your choir mates and get likes."
- Ride the community's big days: before holidays, celebrations, and annual gatherings, everyone is rehearsing together.
When to start: This kind of opportunity isn't very time-sensitive; what matters is the community's calendar. Start posting content 6–8 weeks before the next big gathering of the community you choose.
Signs that would mean you read it wrong:
- If you post 30 videos in a row and daily installs still stay at a dozen or so, it means the community isn't on TikTok, or its members don't need a practice tool.
- A conversion rate far below 1% means community tools can only be built for reputation and service, not revenue.
- Coro LLDM's own installs dropped back to a few dozen a day in early 2027, suggesting this wave was mainly driven by the centennial celebration, not sustained demand.
Research notes: competitor table, acquisition evidence, full research report
- Competitors
Name Where Launched Scale How it differs from this one Coro LLDM (LLDM Choir) com.lldmchoirappfree Android About ¥2021–2022 50k+ installs, 841 reviews An established app, also with SATB, but no updates since 2025-10, and user feedback says the audio won't play. It has 614 scores, Coro LLDM has 1,637, plus live singers recording the voice parts and export. Coro LLDM com.goland.coroapp (goland, Colombia) Android About 2025 10k+ installs, 165 reviews Just a PDF score binder plus importing your own PDFs, with no vocal practice audio, and no updates since 2026-03 Mi Coro - LLDM(Ismael García) iOS 2026-08-03 iOS: 100 ratings 4.9; Android: 500+ (self-reported) Same-period rival, focused on 1000+ scores and offline use, grew through Facebook. It lacks the per-voice audio and TikTok teaching content. Coro LLDM Pro com.lldmchoirapp Android 2021-07 Paid $5.99, niche A one-time-purchase digital choir book that is no longer active Coro LLDM / Pro(Misael Ramírez) Android 2021–2024 100+ Inactive lldmnow.com/partituras Web Earlier than 2024 Not verified Web-based score lookup, not a vocal practice tool - Where users come from
- Verified Official TikTok account @lldmcoroapp: starting 2026-09-16, posted 48 videos, 3,421 followers; 6 videos have 20k+ views (top 33.7k), each with a download channel attached; two install inflection points (09-22~10-04, 10-20~11-02) line up with the hit videos.
- Verified TikTok giveaway for referrals: the prize is 09-23 1 years of Premium plus a song with custom voice parts. Entry required forwarding to choir mates, with the top 3 by likes winning. 09-27 announced the winners.
- Verified Public roadmap and song requests: 10-01 previewed 10-14 piano voice parts and 10-28 live singers; 10-14, 10-21, and 10-22 posted update notes and asked for song requests in the comments.
- Inferred YouTube single-voice videos: YouTube has videos like "GUERRERO CELESTIAL • Coro LLDM - Bajo" with download links in the descriptions; volume unverified.
- Verified Migrating users from an old website: the developer's site lldmcorobc.com says web support has ended and asks users to download the app (this is his own BC state choir app).
- Inferred Store search: the title includes both the keywords Coro LLDM and TLOTW Choir; only around #100 in the Mexico category chart.
- Inferred Paid ads: no evidence found (the ad library only tracks products on the list).
Tlotw Choir - Coro LLDM (com.lldm.coro) research report
Research date: 2026-11-06. Data sources: googleplay / appstore libraries (agent-im server), AppstoreSpy history filling gaps (app_day_ext in the library, labeled "AppstoreSpy est."), Google Play / App Store listing pages, TikHub (TikTok), GitHub API, Jina search.
One line
It's a choir practice app with scores and per-voice audio, built by Huri Jahzeel Tolentino Figueroa, an indie developer in Tijuana, Mexico, for the choir of La Luz del Mundo (LLDM, TLOTW in English). The library has 1,637 bilingual Spanish-English scores and about 580 SATB practice audio tracks, usable offline. Basic features are free, with Premium monthly and annual subscriptions on top.
Verdict
它是封闭宗教社群里的工具 App,起量靠的是开发者 2026-09-16 开的 TikTok 账号 @lldmcoroapp。这个号几乎一天一条,每条是一首教会赞美诗的「分声部合唱教学」视频,文案里都写了下载渠道。账号开出来以前,App 一天只有约 10 个安装;开号后两周涨到一天约 100 个。同类 App 都只是 PDF 乐谱夹,它多了 SATB 分声部音频、MIDI 混音、导出 MP3 发 WhatsApp,还有真人演唱的分声部录音,让 TikTok 内容有东西可演示。差异化和这套内容分发互相成全,两样一起才是它跑出来的原因。
1. Growth data
Cumulative global Google Play installs (2026-07-28 to 10-28 are AppstoreSpy estimates; from 10-29 on, collected by our own library):
| Date | Total installs | Average daily new installs |
|---|---|---|
| 2026-07-09 | Launched | |
| 07-28 | 108 | ~8 |
| 08-25 | 348 | ~14 |
| 09-22 | 650 | ~8 |
| 09-29 | 1,391 | ~106 |
| 10-04 | 2,018 | 368 in a single day |
| 10-20 | 2,909 | ~50 |
| 10-27 | 4,134 | ~175 |
| 11-02 | 4,888 | 386 in a single day |
| 11-06 | 5,088 | ~71 |
- 7 new installs over the last 952 days; rating went from 50 to 74 (library app_day, 10-29 to 11-06). The store shows 5K+ and 4.6 stars.
- The ratio of ratings to installs is about 1.5%, far below typical utility apps, which suggests most installers are core users.
- Charts: it appears every day only on the Mexico Books & Reference free chart, ranking between #82 and #105 (library chart_rank), and has never charted overall.
- On iOS it's listed as "Coro LLDM - TLOTW Choir" (id6792588543), published 2026-07-24, with 25 ratings and 4.92 stars in the Mexico store (iTunes lookup).
- There are two inflection points, both matching TikTok:
- The first is between 09-22 and 10-04, when daily installs jumped from single digits to about 100. That's when the account launched, along with the first hit videos and the giveaway.
- The second is between 10-20 and 11-02, when "live singers' voice parts" launched and 2 more videos with 20k+ views went up.
II. Competitors (doing the same thing)
LLDM choir apps are an old niche, with at least 6 already in it.
| Product | Platform | Launched | Scale | How it differs |
|---|---|---|---|---|
| Coro LLDM (LLDM Choir),com.lldmchoirappfree,Arnel Cariaga Hiciano | Android | About ¥2021–2022 | 50k+ installs, 841 reviews (AppBrain / Play) | The leader in this niche has SATB per-voice parts, but user feedback says playback freezes and the audio won't play; no updates since 2025-10. |
| Coro LLDM Pro,com.lldmchoirapp | Android | 2021-07 | Paid $5.99 (AppBrain) | One-time purchase "Digital Choir Book", niche |
| Coro LLDM, com.goland.coroapp, goland (Colombia, Dan Simei Gómez) | Android | About 2025 | 10k+ installs, 165 reviews, 4.6 stars | Just a PDF sheet-music folder. You can import your own PDFs, but there's no singing audio. 2026-03, no updates since |
| Mi Coro - LLDM,Ismael García | iOS + Android + AppGallery | iOS 2026-08-03 | iOS 100 ratings, 4.9 stars; Android 500+ (self-reported on Facebook) | The direct rival from the same period, with more iOS ratings. It pushes 1000+ scores and offline use, and promotes through its Facebook page |
| Coro LLDM / Coro LLDM Pro, Misael Ramírez (Chile) | Android / iOS | 2021–2024 | Pro version 100+ | Essentially abandoned |
| lldmnow.com/partituras | Web | Earlier than 2024 | Not verified | Web sheet-music lookup and PDF viewing, plus lyric sites. Not an app |
| Instagram @tlotw.choirstudio | Social media | Only English-song singing coaching. Not a tool | ||
| The developer's own Repertorio LLDM BC (com.lldm.bc / iOS id6794062184) | Both platforms | iOS 2026-07-30 | Play 100+ | An internal sheet-music library for the Baja California choir, where accounts need admin approval. It was originally a web version, and users are now being moved to the app |
Where it beats the older products:
- More content: 1,637 sheet-music pieces, more than the veteran's 614.
- Faster updates, with new practice audio added every week.
- Bilingual on both platforms, and it still has a web version.
- It has MIDI per-part mixing, 0.5–2x speed control, a metronome, annotations and highlighting. You can export a single voice part as MP3 to send over WhatsApp, and there are live-sung parts (10-21 launched, first batch of 156 songs).
3. Growth levers (ranked by strength of evidence)
- Own TikTok account @lldmcoroapp (confirmed, main channel)
- Opened around 2026-09-16, has posted 11-06 videos by 48, with 3,421 followers and 36.9k likes (TikHub).
- The fixed video format: a part-by-part teaching of a hymn (scrolling score plus SATB audio). The caption credits the lyricist and arranger, and the ending points to App Store / Google Play / lldmcoro.com.
- Videos with over 20k views: 6 of them.
- 09-16 "Aarón's Historical Hymn" 26k
- 09-17 App intro 20.5k
- 09-20 "Por Tu Elección" 33.7k
- 10-09 "Guerrero Celestial" 32.3k
- 10-18 "Cuando Oí su Voz" 25k
- 10-22 "Valle de los Huesos Secos" 21.3k
- The timing of these lines up closely with the inflection points in the install curve.
- TikTok giveaway (confirmed): 09-23 launched it. The prize is 1 year(s) of Premium, plus a song whose parts the developer "arranges to order." Entry means following, commenting, and sharing with choir mates, and the top 3 by likes win. 09-27 announced the winners. It's a referral loop run through church communities.
- Public roadmap that makes users wait for updates (confirmed): 10-01's videos preview 10-14 plus 80 more piano-part tracks and live singing on 10-28. 10-14, 10-21 and 10-22 each posted release notes. It pulls people back for updates while inviting song requests in the comments.
- YouTube channel "LLDM CORO APP" with single-part videos (exists, data unverified): for example "GUERRERO CELESTIAL • Coro LLDM - Bajo," with the download link in the description.
- Migrating old web users (confirmed as the same developer's playbook): lldmcorobc.com says "web version will stop being supported, please download the official app." That site belongs to another BC app. The developer website linked from com.lldm.coro on Play also points there, suggesting the developer has a pool of choir members who were already using web sheet music.
- New product bringing users back (just starting): 11-05 released an open-source Proyector LLDM, a projection system for church AV booths with hymnals, choir songs, the Bible and OBS overlays (GitHub HuriTolentino/ProyectorLLDM, created 11-02, 1 stars). The goal is to move the developer from "choir app" to "church tech supplier."
- Store search (inferred): the package name and title carry both "Coro LLDM" and "TLOTW Choir," so searches in both Spanish and English land. It only hovered around rank 100 in the Mexico category chart, so chart-driven installs are small.
- Ads: no evidence of paid promotion found. The ad library only tracks products on its watchlist, so not finding anything doesn't mean none ran.
- X / media: x-radar returned 0 posts for "lldm coro" in the last 30 days. No media coverage found.
4. Why it made the list
- Users already exist and need it often: LLDM has choirs everywhere, rehearsing weekly, with big events that concentrate song preparation. 2026 marks the church's centenary, August has Santa Cena 2026, and TikTok has lots of choir videos under #centenariolldm and #tlotwchoir. New songs and arrangements keep coming, and members need to learn their own part, so the demand is specific.
- TikTok is where this community already is: church members already post choir videos on TikTok (#lldm #tlotw). The developer uses "part-by-part teaching of this song" as content, which is useful on its own, so it gets shared into choir groups and doesn't read like an ad.
- The product gives content something to demo: part audio, live singing, export to WhatsApp. Most competitors are just PDF folders and can't produce this kind of video.
- The indie dev iterates fast and is part of the community: from September to November they shipped 3.0, 3.1, 3.5 and 3.6 several major versions, and the copy uses church greetings (La Paz del Señor, Dios les pague). Users request songs in the comments, the developer delivers, and users feel it's "made by one of us."
- Old products stopped, leaving a gap: the veteran com.lldmchoirappfree has reviews complaining that "sound won't play," with its last update in 2025-10. goland's last update was 2026-03.
5. Differentiation
- Against the older app: it doesn't just show the score. It lets people learn their part at home, with SATB parts, live singing, speed control, MP3 export and background playback with the screen off. It also leads on song count and update speed.
- Against the same-period Mi Coro LLDM: it adds audio practice and the TikTok content playbook. Mi Coro has more iOS ratings, which shows rivals are growing too.
- Is this what drove the growth?: yes, but read it together with distribution. The product makes the TikTok content credible and useful, and TikTok solves where users come from. Features without content distribution would look like the pre-September pattern of a dozen installs a day.
6. Money
- Play lists ads and in-app purchases, with IAP priced at $1.99–19.99. On iOS, Premium monthly is MXN 39 (about $2), and yearly is MXN 179–199 (about $10).
- Premium unlocks unlimited practice-audio playback, unlimited export and no ads. The sheet music itself is free.
- Revenue isn't public and hasn't been verified. Based on 5k installs in a small religious niche, a rough estimate is in the low hundreds of dollars a month (unverified).
7. How many people have seen it
- Almost nobody outside the community knows about it. No mentions on X or in media, not listed on TrustMRR, and no founder posts about revenue.
- It only spreads within LLDM believers' TikTok and Facebook circles.
- About 6 players are in this niche (see the competitor table above). The new Mi Coro LLDM launched around the same time, so it's not a copycat. No clear followers have shown up so far.
VIII. What to take from it
- Playbook for closed-community tools: pick a religious or interest community with fixed group activities (choir rehearsals) and content that keeps refreshing (new songs). Build a "practice tool," then post the content the tool produces (part-by-part demo videos) on TikTok every day.
- Giveaway design: the prize is "annual membership plus content made from the songs you pick." The entry bar is "share it with your choir mates," which drops you straight into the group's sharing chain.
- Public roadmap plus song requests: users look forward to new features while also setting your content schedule.
- One developer building a community's full toolkit: a choir app, a state-level internal library, and a church projection system. Each one extends the trust further.
- The same template could move to other religious or choral communities: LDS, Jehovah's Witnesses, evangelical choirs, national choral groups.
9. What I'm still unsure about
- How much traffic the YouTube channel and Facebook bring is unverified.
- From late September to October, churches may have large events where people prepare songs (mostly themed "Elección"). Not verified.
- Every day it sits around #100 on Mexico's Books & Reference chart. How much exposure these chart spots contribute is not verified.
- Revenue scale and paying-user rate: not verified.
- The weekly data AppstoreSpy backfilled is averaged across observation points, so single-day numbers can't be taken at face value.
- Not clear how the users split between the US (TLOTW English choir) and Mexico.
Sources
- Play store page play.google.com/store/apps/details?id=com.lldm.coro ; com.lldm.bc ; com.lldmchoirappfree ; com.goland.coroapp
- App Store apps.apple.com/mx/app/tlotw-choir/id6792588543 ;Mi Coro apps.apple.com/us/app/mi-coro-lldm/id6793714493
- Website lldmcoro.com/ ; www.lldmcorobc.com/
- TikTok www.tiktok.com/@lldmcoroapp (pulled via TikHub, 11-06)
- GitHub github.com/HuriTolentino/ProyectorLLDM
- AppBrain www.appbrain.com/app/coro-lldm-pro-lldm-choir-pro/com.lldmch… ;Mi Coro Facebook www.facebook.com/MiCoroLLDM
- Databases: googleplay.app_day / app_day_ext / chart_rank; appstore.app_day