[033]Worth borrowing fromMainly Android · globalSubscription / one-time purchaseData as of 2026-11-08

Ear-training micro-tool for music learners, hard paywall at $7.99/week; you need to know Meta paid acquisition

Watch. Ear training demand is real, but today the only path that visibly makes money is "Meta paid acquisition + hard weekly paywall at $7.99/week."If you can run Meta ads, burn a few thousand dollars to test the funnel, and take one-star reviews, go after adjacent gaps like sight-singing, rhythm, or chord progressions. If you only want organic traffic, wait until Sine or Trill reaches the top-grossing charts before moving.Worth studying · grade and headline derived from the full text · next review 12-01

Background	Ear-training apps have existed for 15 years. The veteran Perfect Ear is free with a one-time purchase and has 8.73M installs on Google Play.
Upside	Pitch Trainer took the questionnaire + paywall + Meta paid-acquisition funnel from fitness and language apps and applied it to ear training, and it worked
Demand	Steady: Perfect Ear has run for 13 years and still gets 1,770 installs a day. Users will pay, but they hate being tricked into it. Offer a free tier or a one-time purchase.
Competition	Old shops own the free / one-time-purchase mindset. In 2026 Pitch Master, Sine, and Pitch Trainer launched Android versions, all selling "four-week perfect pitch"
Revenue	Pitch Trainer ranked in the top 50 of Education Top Grossing in the 4 Play store (#29 in Indonesia); no ear-training app has published verified revenue, and music utility apps on TrustMRR earn tens to hundreds of dollars a month
Growth	Pitch Trainer buys only on Meta: running 264 ads now, 820 in history (11-03); Sine and Trill don't appear in the Meta ad library, yet their US ratings are rising faster
Window	No hard window. Supply is accelerating, and the "ear-training Duolingo" pitch is already taken.
Who it's for	A team of 1–2 people who can run Meta ads and build adjacent small tools, or an indie developer who is a musician and can keep up short video and SEO over the long term.

Full text · about 11 min

Who's building · 6 teams

Pitch Trainer
What it does
Note names, intervals, chords, scales, chord progression recognition. Onboarding questionnaire, then hard paywall. Website: $0.99 first week, then $7.99/week or $49.99/year. Live on iOS 2026-01-27 and Play 2026-06-06.
Who they are
Ear & Pitch Training Studios LLC. The address is a registered-agent address in Sheridan, Wyoming, with a Los Angeles area code phone. No public names. The same seller has only 1 other apps.
How it got traction
Meta only: launched paid ads from 06-28, page has 169 likes, 264 active ads and 820 in history. Six in ten landed on Play. No ads from it in TikTok (Europe) or the Google Ads Transparency Center.
Where it stands
Play 209,279 installs, 4.56 stars. 10-29→11-02 daily growth about 3,100. Play Education Top Grossing ids: #29 (id), #35 (ca), #39 (au), #49 (mx). App Store recent 24 text reviews average 1.5 stars (11-02 / 11-03).
Sine: Ear Training Games
What it does
Gamified perfect pitch training: lemur sidekick, tuning mini-games, friends grow trees. Free tier usable. Encore $1.99/month, $14.99/year, $29.99 one-time. Live on iOS 2026-09-18 and Play 09-23.
Who they are
Ethan Liao, Huntington Beach, California. Company MAOI LLC (registered 2024-11). Describes himself as several people who play piano, teach piano, and write code. This is his first app. No public personal background.
How it got traction
Not visible in the Meta Ad Library. Unclear whether it runs ads on TikTok or Google. The website only links to Instagram @learn.sine.
Where it stands
US store 669 ratings, 4.90 stars, 10-28→11-03 +157 (fastest among peers). Play 19,936 installs. Not yet on any top chart (11-03).
Trill: Ear Training Daily
What it does
Daily ear training + Focus Lock (you can't open TikTok / Instagram / YouTube until you finish). $9.99/week, yearly subscription $14.99–59.99. Live on iOS 2025-08-27.
Who they are
Jozef Budáč, Bratislava, Slovakia, born 1998, software engineer and musician. Sole shareholder of gmol6.studio s.r.o., 1 employees. The product started as a sheet-music transposition tool.
How it got traction
Posts on X and Indie Hackers, SEO blog. Not visible in the Meta Ad Library. Unclear whether it advertises on TikTok or Google.
Where it stands
US store 1,876 ratings, 4.59 stars, 6 days +68. US music Top Grossing #91–138. Self-reported 60k+ users in spring (11-03).
Pitch Master - Ear Training
What it does
Adaptive ear training, "learn perfect pitch in four weeks." Price $6.99–49.99. iOS 2026-06-16.
Who they are
Namu Inc, a small studio with multiple apps (church community, prayer journal, pregnancy journal, etc.). Terms on the site name Analog Studio as the party and apply Canadian law. Founder not disclosed.
How it got traction
The privacy policy includes Meta conversion tracking, but its page can't be found in the Meta Ad Library, so it's uncertain whether it advertises. Unclear on TikTok and Google.
Where it stands
US store 603 ratings, 4.62 stars, 6 days +59. US Education chart #132–159 (11-03).
Perfect Ear
What it does
Combined ear training, rhythm, sight-singing. Free plus one-time purchase (Premium $14.99, practice packs $0.99–4.99), 8 languages. On Play since 2013.
Who they are
Crazy Ootka Software AB, Stockholm. The install package signature belongs to Alexander Osmanov of Voronezh (presumed original developer). Team size not disclosed.
How it got traction
Ten-plus years of search and word of mouth, often recommended on Reddit. No ads visible in the ad library.
Where it stands
Play 8,731,303 installs, 86,383 ratings, 4.65 stars, 10-29→11-02 daily growth about 1,770 (11-02).
Vocalista: Learn to Sing
What it does
Vocal training: practice by vocal range, real-time pitch feedback. 7-day trial converts to yearly subscription, in-app purchases $7.99–79.99. Live on 2022-11.
Who they are
Julian Boehm-Tettelbach, Berlin, run as a solo operation (presumed). Also makes a tuner and metronome app.
How it got traction
Acquisition method not disclosed. No ads visible in the ad library.
Where it stands
78 stores combined, 7,903 ratings, US store 6 days +28. Paywall says "300k+ singers." Third-party ScreensDesign estimates about $40k monthly revenue (third-party estimate, not accounts).