Question.AI-Math Calculator vs Retain Cards: AI Flashcards

Question.AI-Math Calculator

3HOUSE
App Store
$2.24M/mo
~$26.87M/yr · 7.1M installs
VS

Retain Cards: AI Flashcards

Retain Labs GmbH
App Store
$149/mo
~$1.8K/yr · 7K installs
Revenue winner Question.AI-Math Calculator wins +1502601% vs other
Installs winner Question.AI-Math Calculator wins +106909% vs other
MAU winner Question.AI-Math Calculator wins +575536% vs other
Rating winner Question.AI-Math Calculator wins +5% vs other

Why Question.AI-Math Calculator is winning

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

  1. Question.AI-Math Calculator earns roughly 15027× more per month than Retain Cards: AI Flashcards - $2.24M vs $149.
  2. Aggressive pricing. Question.AI-Math Calculator undercuts at $8.99/mo vs $12.99/mo - converts a higher % of free users.
  3. Bigger install base. Question.AI-Math Calculator has ~7.1M lifetime installs vs Retain Cards: AI Flashcards's ~7K - 1070.1× the funnel top.

→ Find more apps with this revenue gap · Full Question.AI-Math Calculator report

Side-by-side metrics

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

Question.AI-Math Calculator
vs
Retain Cards: AI Flashcards
Monthly revenue (est.)?
$2.24M
◀
$149
Annual revenue (est.)
$26.87M
◀
$1.8K
Lifetime installs (est.)
7.1M
◀
7K
Monthly active users (est.)?
4.4M
◀
765.6
App Store rating
4.70★
◀
4.49★
Total ratings
157K
◀
132
US grossing rank
-
=
-
Cheapest monthly sub
$8.99
▶
$12.99
IAP tiers detected
4 tiers
▶
6 tiers

Question.AI-Math Calculator

3HOUSE
App Store
Category
Education
Price
Free
Released
May 30, 2023
Last updated
Apr 29, 2026
File size
135.5 MB
Content rating
4+
Version
3.5.6
Languages
Arabic, Dutch, English, French, German, Indonesian +9 more
View full Question.AI-Math Calculator report →

Retain Cards: AI Flashcards

Retain Labs GmbH
App Store
Category
Education
Price
Free
Released
May 7, 2025
Last updated
Apr 24, 2026
File size
9.5 MB
Content rating
4+
Version
2.5
Languages
Danish, Dutch, English, Finnish, French, German +5 more
View full Retain Cards: AI Flashcards report →

Question.AI-Math Calculator trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Retain Cards: AI Flashcards trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Related app pages

Question.AI-Math Calculator App Store page →Retain Cards: AI Flashcards App Store page →

Related comparisons

Official Dvsa Theory Test Kit iOS vs Question AI Math Calculator iOSCitb Op Spec Hs E Test iOS vs Question AI Math Calculator iOSDriving Theory Test 4 in 1 Kit iOS vs Question AI Math Calculator iOSCitb Map Hs E Test V10 iOS vs Question AI Math Calculator iOSAnkimobile Flashcards iOS vs Question AI Math Calculator iOSOfficial Life in the Uk Test iOS vs Question AI Math Calculator iOS

Compare another pair

FAQ

Which makes more money, Question.AI-Math Calculator or Retain Cards: AI Flashcards? v
Question.AI-Math Calculator earns about $2.24M per month, while Retain Cards: AI Flashcards earns about $149. That is a 15027.0× revenue gap (~$2.24M more per month for Question.AI-Math Calculator). Annual revenue: Question.AI-Math Calculator ≈ $26.87M/year, Retain Cards: AI Flashcards ≈ $1.8K/year. Estimates are derived from public App Store signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, Question.AI-Math Calculator or Retain Cards: AI Flashcards? v
Question.AI-Math Calculator leads with about 7.1M estimated downloads vs 7K for Retain Cards: AI Flashcards - a 1070.1× gap. Question.AI-Math Calculator's App Store downloads are estimated from 157K ratings × the standard 1:75 ratio. Retain Cards: AI Flashcards's App Store downloads are estimated from 127 ratings.
Are Question.AI-Math Calculator and Retain Cards: AI Flashcards 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 Question.AI-Math Calculator and Retain Cards: AI Flashcards offer? v
Question.AI-Math Calculator: IAP range 4 tiers detected. Retain Cards: AI Flashcards: IAP range 6 tiers detected. Question.AI-Math Calculator runs a "Subscription (~$8.99/mo, ai)" monetization model; Retain Cards: AI Flashcards runs "Subscription (~$5.99/mo)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, Question.AI-Math Calculator or Retain Cards: AI Flashcards? v
Question.AI-Math Calculator edges ahead with ★ 4.7 vs ★ 4.5 (gap of 0.2 stars). Rating volume: Question.AI-Math Calculator 157K ratings, Retain Cards: AI Flashcards 127 ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these Question.AI-Math Calculator vs Retain Cards: AI Flashcards revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $2.24M for Question.AI-Math Calculator and $149 for Retain Cards: AI Flashcards 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 Question.AI-Math Calculator or Retain Cards: AI Flashcards 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.