Retain Cards: AI Flashcards vs Knowunity: AI Study & Homework

Retain Cards: AI Flashcards

Retain Labs GmbH
App Store
$217/mo
~$2.6K/yr · 10K installs
VS

Knowunity: AI Study & Homework

Knowunity
Google Play
$1.81M/mo
~$21.70M/yr · 21.5M installs
Revenue winner Knowunity: AI Study & Homework wins +833058% vs other
Installs winner Knowunity: AI Study & Homework wins +222581% vs other
MAU winner Knowunity: AI Study & Homework wins +360796% vs other
Rating winner Knowunity: AI Study & Homework wins +7% vs other

Why Knowunity: AI Study & Homework is winning

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

  1. Knowunity: AI Study & Homework earns roughly 8332× more per month than Retain Cards: AI Flashcards - $1.81M vs $217.
  2. Premium pricing. Knowunity: AI Study & Homework charges $18.95/mo vs Retain Cards: AI Flashcards's $12.99/mo - higher ARPU per converted user.
  3. Bigger install base. Knowunity: AI Study & Homework has ~21.5M lifetime installs vs Retain Cards: AI Flashcards's ~10K - 2226.8× the funnel top.

→ Find more apps with this revenue gap · Full Knowunity: AI Study & Homework report

Side-by-side metrics

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

Retain Cards: AI Flashcards
vs
Knowunity: AI Study & Homework
Monthly revenue (est.)?
$217
▶
$1.81M
Annual revenue (est.)
$2.6K
▶
$21.70M
Lifetime installs (est.)
10K
▶
21.5M
Monthly active users (est.)?
1K
▶
4.0M
App Store rating
4.46★
▶
4.75★
Total ratings
193
▶
122K
US grossing rank
-
=
-
Cheapest monthly sub
$12.99
▶
$18.95
IAP tiers detected
6 tiers
◀
0 tiers

Retain Cards: AI Flashcards

Retain Labs GmbH
App Store
Category
Education
Price
Free
Released
May 7, 2025
Last updated
Jun 30, 2026
File size
9.8 MB
Content rating
4+
Version
2.7
Languages
Danish, Dutch, English, Finnish, French, German +6 more
View full Retain Cards: AI Flashcards report →

Knowunity: AI Study & Homework

Knowunity
Google Play
Category
Education
Price
Free
Released
Sep 10, 2020
Last updated
Jul 2, 2026
File size
-
Content rating
Everyone 10+
Version
6.27.3
Languages
-
View full Knowunity: AI Study & Homework report →

Retain Cards: AI Flashcards trajectory

AugSepOctNovDecJanFebMarAprMayJunJul

Knowunity: AI Study & Homework trajectory

AugSepOctNovDecJanFebMarAprMayJunJul

Related app pages

Retain Cards: AI Flashcards App Store page →Knowunity: AI Study & Homework Play Store page →

Related comparisons

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

Compare another pair

FAQ

Which makes more money, Retain Cards: AI Flashcards or Knowunity: AI Study & Homework? v
Knowunity: AI Study & Homework earns about $1.81M per month, while Retain Cards: AI Flashcards earns about $217. That is a 8331.6× revenue gap (~$1.81M more per month for Knowunity: AI Study & Homework). Annual revenue: Retain Cards: AI Flashcards ≈ $2.6K/year, Knowunity: AI Study & Homework ≈ $21.70M/year. Estimates are derived from public App Store / Google Play signals - grossing rank, scraped IAP tiers, ratings and category benchmarks.
Which has more downloads, Retain Cards: AI Flashcards or Knowunity: AI Study & Homework? v
Knowunity: AI Study & Homework leads with about 21.5M estimated downloads vs 10K for Retain Cards: AI Flashcards - a 2226.8× gap. Retain Cards: AI Flashcards's App Store downloads are estimated from 193 ratings × the standard 1:75 ratio. Knowunity: AI Study & Homework reports 10,000,000+ installs on Google Play.
Are Retain Cards: AI Flashcards and Knowunity: AI Study & Homework 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 Retain Cards: AI Flashcards and Knowunity: AI Study & Homework offer? v
Retain Cards: AI Flashcards: IAP range 6 tiers detected. Knowunity: AI Study & Homework: IAP range $4.99 - $71.99 per item. Retain Cards: AI Flashcards runs a "Subscription (~$5.99/mo)" monetization model; Knowunity: AI Study & Homework runs "Subscription (~$18.95/mo, ai)". Scraped tier prices and detected subscription pricing drive the bulk of the per-app revenue estimate above.
Which has better ratings, Retain Cards: AI Flashcards or Knowunity: AI Study & Homework? v
Knowunity: AI Study & Homework edges ahead with ★ 4.8 vs ★ 4.5 (gap of 0.3 stars). Rating volume: Retain Cards: AI Flashcards 193 ratings, Knowunity: AI Study & Homework 752 ratings. Higher rating volume = stronger ASO signal even when star averages are close.
How accurate are these Retain Cards: AI Flashcards vs Knowunity: AI Study & Homework revenue estimates? v
Directional - typically within 2-3× of actual money earned for popular apps. The $217 for Retain Cards: AI Flashcards and $1.81M for Knowunity: AI Study & Homework 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 Retain Cards: AI Flashcards or Knowunity: AI Study & Homework 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.