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

Retain Cards: AI Flashcards

Retain Labs GmbH
App Store
$149/mo
~$1.8K/yr · 7K installs
VS

Knowunity: AI Study & Homework

Knowunity
Google Play
$1.73M/mo
~$20.72M/yr · 20.6M installs
Revenue winner Knowunity: AI Study & Homework wins +1158758% vs other
Installs winner Knowunity: AI Study & Homework wins +311813% vs other
MAU winner Knowunity: AI Study & Homework wins +502725% vs other
Rating winner Knowunity: AI Study & Homework wins +5% 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 11589× more per month than Retain Cards: AI Flashcards - $1.73M vs $149.
  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 ~20.6M lifetime installs vs Retain Cards: AI Flashcards's ~7K - 3119.1× 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.)?
$149
▶
$1.73M
Annual revenue (est.)
$1.8K
▶
$20.72M
Lifetime installs (est.)
7K
▶
20.6M
Monthly active users (est.)?
765.6
▶
3.8M
App Store rating
4.49★
▶
4.71★
Total ratings
132
▶
116K
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
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 →

Knowunity: AI Study & Homework

Knowunity
Google Play
Category
Education
Price
Free
Released
Sep 10, 2020
Last updated
May 8, 2026
File size
-
Content rating
Everyone 10+
Version
6.19.3
Languages
-
View full Knowunity: AI Study & Homework report →

Retain Cards: AI Flashcards trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Knowunity: AI Study & Homework trajectory

JunJulAugSepOctNovDecJanFebMarAprMay

Related app pages

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

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Compare another pair

FAQ

Which makes more money, Retain Cards: AI Flashcards or Knowunity: AI Study & Homework? v
Knowunity: AI Study & Homework earns about $1.73M per month, while Retain Cards: AI Flashcards earns about $149. That is a 11588.6× revenue gap (~$1.73M more per month for Knowunity: AI Study & Homework). Annual revenue: Retain Cards: AI Flashcards ≈ $1.8K/year, Knowunity: AI Study & Homework ≈ $20.72M/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 20.6M estimated downloads vs 7K for Retain Cards: AI Flashcards - a 3119.1× gap. Retain Cards: AI Flashcards's App Store downloads are estimated from 127 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 ★ 4.7 vs ★ 4.5 (gap of 0.2 stars). Rating volume: Retain Cards: AI Flashcards 127 ratings, Knowunity: AI Study & Homework 707 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 $149 for Retain Cards: AI Flashcards and $1.73M 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.