CITB Op/Spec HS&E test vs Tandem: Practice Languages

CITB Op/Spec HS&E test

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

Tandem: Practice Languages

Tripod Technology GmbH
App Store
$222.1K/mo
~$2.67M/yr · 4.1M installs
Revenue winner Tandem: Practice Languages wins +198219% vs other
Installs winner Tandem: Practice Languages wins +678142% vs other
MAU winner Tandem: Practice Languages wins +1395620% vs other
Rating winner CITB Op/Spec HS&E test wins +9% vs other

Why Tandem: Practice Languages is winning

Top 4 reasons - backed by the public App Store / Play Store numbers.

  1. Tandem: Practice Languages earns roughly 1983× more per month than CITB Op/Spec HS&E test - $222.1K vs $112.
  2. Subscription model. Tandem: Practice Languages runs a $5.42/mo subscription that compounds; CITB Op/Spec HS&E test relies on one-shot IAP or ads.
  3. Bigger install base. Tandem: Practice Languages has ~4.1M lifetime installs vs CITB Op/Spec HS&E test's ~600 - 6782.4× the funnel top.
  4. More monetization surfaces. Tandem: Practice Languages runs 3 IAP tiers vs 0 - more chances to convert users at the right price.

→ Find more apps with this revenue gap · Full Tandem: Practice Languages report

Side-by-side metrics

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

CITB Op/Spec HS&E test
vs
Tandem: Practice Languages
Monthly revenue (est.)?
$112
▶
$222.1K
Annual revenue (est.)
$1.3K
▶
$2.67M
Lifetime installs (est.)
600
▶
4.1M
Monthly active users (est.)?
72.6
▶
1.0M
App Store rating
5.00★
◀
4.60★
Total ratings
12
▶
37K
US grossing rank
-
=
-
Cheapest monthly sub
No sub
▶
$5.42
IAP tiers detected
0 tiers
▶
3 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 →

Tandem: Practice Languages

Tripod Technology GmbH
App Store
Category
Education
Price
Free
Released
Feb 20, 2015
Last updated
May 7, 2026
File size
256.9 MB
Content rating
17+
Version
7.17.0
Languages
English, French, German, Italian, Japanese, Korean +8 more
View full Tandem: Practice Languages report →

CITB Op/Spec HS&E test trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Tandem: Practice Languages trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Related app pages

CITB Op/Spec HS&E test App Store page →Tandem: Practice Languages App Store page →

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FAQ

Which makes more money, CITB Op/Spec HS&E test or Tandem: Practice Languages? v
Tandem: Practice Languages earns about $222.1K per month, while CITB Op/Spec HS&E test earns about $112. That is a 1983.2× revenue gap (~$222.0K more per month for Tandem: Practice Languages). Annual revenue: CITB Op/Spec HS&E test ≈ $1.3K/year, Tandem: Practice Languages ≈ $2.67M/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 Tandem: Practice Languages? v
Tandem: Practice Languages leads with about 4.1M estimated downloads vs 600 for CITB Op/Spec HS&E test - a 6782.4× gap. CITB Op/Spec HS&E test's App Store downloads are estimated from 12 ratings × the standard 1:75 ratio. Tandem: Practice Languages's App Store downloads are estimated from 37K ratings.
Are CITB Op/Spec HS&E test and Tandem: Practice Languages 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 Tandem: Practice Languages offer? v
CITB Op/Spec HS&E test: no IAP detected on the public listing. Tandem: Practice Languages: IAP range 3 tiers detected. CITB Op/Spec HS&E test runs a "Paid app ($6.99)" monetization model; Tandem: Practice Languages runs "Subscription (~$5.42/mo, language)". 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 Tandem: Practice Languages? v
CITB Op/Spec HS&E test edges ahead with ★ 5.0 vs ★ 4.6 (gap of 0.4 stars). Rating volume: CITB Op/Spec HS&E test 12 ratings, Tandem: Practice Languages 37K ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these CITB Op/Spec HS&E test vs Tandem: Practice Languages 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 $222.1K for Tandem: Practice Languages 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 Tandem: Practice Languages 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.