CITB Op/Spec HS&E test vs flowkey - Learn to Play Piano

CITB Op/Spec HS&E test

CITB
App Store
$112/mo
~$1.3K/yr · 600 installs
VS

flowkey - Learn to Play Piano

flowkey GmbH
App Store
$532.1K/mo
~$6.38M/yr · 7.0M installs
Revenue winner flowkey - Learn to Play Piano wins +474946% vs other
Installs winner flowkey - Learn to Play Piano wins +1160345% vs other
MAU winner flowkey - Learn to Play Piano wins +1131574% vs other
Rating winner CITB Op/Spec HS&E test wins +6% vs other

Why flowkey - Learn to Play Piano is winning

Top 3 reasons - backed by the public App Store / Play Store numbers.

  1. flowkey - Learn to Play Piano earns roughly 4750× more per month than CITB Op/Spec HS&E test - $532.1K vs $112.
  2. Subscription model. flowkey - Learn to Play Piano runs a $19.99/mo subscription that compounds; CITB Op/Spec HS&E test relies on one-shot IAP or ads.
  3. Bigger install base. flowkey - Learn to Play Piano has ~7.0M lifetime installs vs CITB Op/Spec HS&E test's ~600 - 11604.5× the funnel top.

→ Find more apps with this revenue gap · Full flowkey - Learn to Play Piano report

Side-by-side metrics

Bars scale to whichever app is bigger on that row. Green = winner.

CITB Op/Spec HS&E test
vs
flowkey - Learn to Play Piano
Monthly revenue (est.)?
$112
▶
$532.1K
Annual revenue (est.)
$1.3K
▶
$6.38M
Lifetime installs (est.)
600
▶
7.0M
Monthly active users (est.)?
72.6
▶
822K
App Store rating
5.00★
◀
4.72★
Total ratings
12
▶
63K
US grossing rank
-
=
-
Cheapest monthly sub
No sub
▶
$19.99
IAP tiers detected
0 tiers
▶
2 tiers

CITB Op/Spec HS&E test

CITB
App Store
Category
Education
Price
USD6.99
Released
May 16, 2019
Last updated
Jan 8, 2026
File size
148.2 MB
Content rating
12+
Version
6.0.52
Languages
English
View full CITB Op/Spec HS&E test report →

flowkey - Learn to Play Piano

flowkey GmbH
App Store
Category
Education
Price
Free
Released
Aug 21, 2015
Last updated
May 7, 2026
File size
104.3 MB
Content rating
4+
Version
2.106.1
Languages
English, French, German, Italian, Japanese, Korean +5 more
View full flowkey - Learn to Play Piano report →

CITB Op/Spec HS&E test trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

flowkey - Learn to Play Piano trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Related app pages

CITB Op/Spec HS&E test App Store page →flowkey - Learn to Play Piano App Store page →

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FAQ

Which makes more money, CITB Op/Spec HS&E test or flowkey - Learn to Play Piano? v
flowkey - Learn to Play Piano earns about $532.1K per month, while CITB Op/Spec HS&E test earns about $112. That is a 4750.5× revenue gap (~$531.9K more per month for flowkey - Learn to Play Piano). Annual revenue: CITB Op/Spec HS&E test ≈ $1.3K/year, flowkey - Learn to Play Piano ≈ $6.38M/year. Estimates are derived from public App Store signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, CITB Op/Spec HS&E test or flowkey - Learn to Play Piano? v
flowkey - Learn to Play Piano leads with about 7.0M estimated downloads vs 600 for CITB Op/Spec HS&E test - a 11604.5× gap. CITB Op/Spec HS&E test's App Store downloads are estimated from 12 ratings × the standard 1:75 ratio. flowkey - Learn to Play Piano's App Store downloads are estimated from 63K ratings.
Are CITB Op/Spec HS&E test and flowkey - Learn to Play Piano in the same App Store category and competing for the same money? v
Yes - both apps sit in the Education category, which means they compete directly for the same paying users and category-level wallet share. Direct competitors, head-to-head.
What in-app purchases and subscription pricing do CITB Op/Spec HS&E test and flowkey - Learn to Play Piano offer? v
CITB Op/Spec HS&E test: no IAP detected on the public listing. flowkey - Learn to Play Piano: IAP range 2 tiers detected. CITB Op/Spec HS&E test runs a "Paid app ($6.99)" monetization model; flowkey - Learn to Play Piano runs "Subscription (~$19.99/mo)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, CITB Op/Spec HS&E test or flowkey - Learn to Play Piano? v
CITB Op/Spec HS&E test edges ahead with ★ 5.0 vs ★ 4.7 (gap of 0.3 stars). Rating volume: CITB Op/Spec HS&E test 12 ratings, flowkey - Learn to Play Piano 63K ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these CITB Op/Spec HS&E test vs flowkey - Learn to Play Piano revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $112 for CITB Op/Spec HS&E test and $532.1K for flowkey - Learn to Play Piano are derived from App Store grossing rank, scraped IAP tiers, ratings volume and category benchmarks (Education) - net of the 15-30% Apple/Google store cut. Real revenue depends on country mix, retention, refunds and ad fill rate, none of which Apple or Google publish.
How do I compare CITB Op/Spec HS&E test or flowkey - Learn to Play Piano to a different App Store app? v
Use the search box at the bottom of this page or paste any two App Store links into the homepage tool. We auto-generate a permanent comparison URL with revenue, downloads, IAP tiers, subscription pricing and grossing rank for both apps.