InstaEnglish-Speak&Learn Fast vs DuoCards - Vocabulary Builder
InstaEnglish-Speak&Learn Fast
Westberg Co., Ltd.
App Store
$24/mo
~$286/yr · 1K installs
VS
DuoCards - Vocabulary Builder
DuoCards
Google Play
$300.4K/mo
~$3.61M/yr · 5.4M installs
Revenue winner
DuoCards - Vocabulary Builder wins
+1251746% vs other
Installs winner
DuoCards - Vocabulary Builder wins
+510927% vs other
MAU winner
DuoCards - Vocabulary Builder wins
+537133% vs other
Rating winner
InstaEnglish-Speak&Learn Fast wins
+4% vs other
Why DuoCards - Vocabulary Builder is winning
Top 3 reasons - backed by the public App Store / Play Store numbers.
- DuoCards - Vocabulary Builder earns roughly 12518× more per month than InstaEnglish-Speak&Learn Fast - $300.4K vs $24.
- Premium pricing. DuoCards - Vocabulary Builder charges $26.94/mo vs InstaEnglish-Speak&Learn Fast's $9.99/mo - higher ARPU per converted user.
- Bigger install base. DuoCards - Vocabulary Builder has ~5.4M lifetime installs vs InstaEnglish-Speak&Learn Fast's ~1K - 5110.3× the funnel top.
→ Find more apps with this revenue gap · Full DuoCards - Vocabulary Builder report
Side-by-side metrics
Bars scale to whichever app is bigger on that row. Green = winner.
InstaEnglish-Speak&Learn Fast
vs
DuoCards - Vocabulary Builder
Monthly revenue (est.)?
$24
▶
$300.4K
Annual revenue (est.)
$286
▶
$3.61M
Lifetime installs (est.)
1K
▶
5.4M
Monthly active users (est.)?
122.85
▶
660K
App Store rating
4.57★
◀
4.41★
Total ratings
21
▶
53K
US grossing rank
-
=
-
Cheapest monthly sub
$9.99
▶
$26.94
IAP tiers detected
5 tiers
◀
0 tiers
- Category
- Education
- Price
- Free
- Released
- Jan 3, 2024
- Last updated
- Jun 25, 2026
- File size
- 163.5 MB
- Content rating
- 4+
- Version
- 1.2.94
- Languages
- English, Japanese, Korean
- Category
- Education
- Price
- Free
- Released
- Apr 4, 2020
- Last updated
- Jan 21, 2026
- File size
- -
- Content rating
- Everyone
- Version
- 1.20.15
- Languages
- -
InstaEnglish-Speak&Learn Fast trajectory
DuoCards - Vocabulary Builder trajectory
FAQ
Which makes more money, InstaEnglish-Speak&Learn Fast or DuoCards - Vocabulary Builder? v
DuoCards - Vocabulary Builder earns about $300.4K per month, while InstaEnglish-Speak&Learn Fast earns about $24. That is a 12518.5× revenue gap (~$300.4K more per month for DuoCards - Vocabulary Builder). Annual revenue: InstaEnglish-Speak&Learn Fast ≈ $286/year, DuoCards - Vocabulary Builder ≈ $3.61M/year. Estimates are derived from public App Store / Google Play signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, InstaEnglish-Speak&Learn Fast or DuoCards - Vocabulary Builder? v
DuoCards - Vocabulary Builder leads with about 5.4M estimated downloads vs 1K for InstaEnglish-Speak&Learn Fast - a 5110.3× gap. InstaEnglish-Speak&Learn Fast's App Store downloads are estimated from 21 ratings × the standard 1:75 ratio. DuoCards - Vocabulary Builder reports 5,000,000+ installs on Google Play.
Are InstaEnglish-Speak&Learn Fast and DuoCards - Vocabulary Builder in the same App Store category on each store 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 InstaEnglish-Speak&Learn Fast and DuoCards - Vocabulary Builder offer? v
InstaEnglish-Speak&Learn Fast: IAP range 5 tiers detected. DuoCards - Vocabulary Builder: IAP range $6.70 - $108.33 per item. InstaEnglish-Speak&Learn Fast runs a "Subscription (~$5.99/mo)" monetization model; DuoCards - Vocabulary Builder runs "Subscription (~$26.94/mo, language)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, InstaEnglish-Speak&Learn Fast or DuoCards - Vocabulary Builder? v
InstaEnglish-Speak&Learn Fast edges ahead with ★ 4.6 vs ★ 4.4 (gap of 0.2 stars). Rating volume: InstaEnglish-Speak&Learn Fast 21 ratings, DuoCards - Vocabulary Builder 660 ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these InstaEnglish-Speak&Learn Fast vs DuoCards - Vocabulary Builder revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $24 for InstaEnglish-Speak&Learn Fast and $300.4K for DuoCards - Vocabulary Builder are derived from App Store grossing rank / Google Play install ranges, 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 InstaEnglish-Speak&Learn Fast or DuoCards - Vocabulary Builder to a different App Store app? v
Use the search box at the bottom of this page or paste any two App Store or Google Play 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.