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Retain Cards: KI-Karteikarten icon

Retain Cards: KI-Karteikarten

Retain Labs GmbH

Category: EducationIndie (reviewed)
Watch Retain Cards: KI-KarteikartenApp Store (opens in a new tab)
Rating
2.5 out of 52 ratings
Best rank
#16Germany
Charts
32 countries
Price
Free
Size
10.3 MB
Requires
iOS 15.0or later

As of 10 Nov 2026, Retain Cards: KI-Karteikarten is #16 in Grossing · Education in Germany, its best of 3 chart positions across 2 countries. Over the last 7 days its biggest fall was 21 places, to #55 in Free · Education in France. Its best rank in the last 7 days was #15 in Grossing · Education in Germany. Appulse Index first saw Retain Cards: KI-Karteikarten in a tracked chart on 8 Oct 2026. Since then it has charted on 34 days in 8 countries, with a best rank of #10 in Free · Education in Germany on 25 Oct 2026.

Current rank

#16

Germany · Grossing · Education

Was
#157 days ago
Change
Down 1 placeover 7 days
Best
#15in 7 days
Longest chart run
34 daysGermany · Grossing · Education
New ratings, 7 days
—Needs a week of rating history

Chart record

Every tracked chart, country and day since Appulse Index first saw this app in a chart.

Best rank ever#10Germany · Free · Education · 25 Oct 2026
Best in an overall chart—Not in an overall top 100 yet
Days in a chart34Since 8 Oct 2026
Countries charted in8Of 11 tracked

What's new

Version 3.0 · 25 days ago

学習セッションにボイスモードを追加しました。

Ranking events

  1. Dropped #28 → #55 in Free · EducationFrance
  2. Entered the Grossing · Education chart at #94Japan
  3. Climbed #84 → #56 in Grossing · EducationFrance
  4. Climbed #66 → #35 in Free · EducationFrance
  5. Dropped #56 → #84 in Grossing · EducationFrance
  6. Climbed #56 → #31 in Free · EducationFrance
Show 20 earlier events
  1. Dropped #34 → #59 in Grossing · EducationFrance
  2. Entered the Grossing · Education chart at #65Spain
  3. Climbed #64 → #34 in Grossing · EducationFrance
  4. Climbed #86 → #60 in Free · EducationFrance
  5. Climbed #82 → #45 in Grossing · EducationFrance
  6. Entered the Free · Education chart at #77Spain
  7. Entered the Free · Education chart at #97Spain
  8. Dropped #52 → #96 in Grossing · EducationFrance
  9. Climbed #44 → #13 in Free · EducationGermany
  10. Climbed #90 → #56 in Grossing · EducationFrance
  11. Entered the Free · Education chart at #96Canada
  12. Dropped #61 → #87 in Grossing · EducationFrance
  13. Climbed #87 → #59 in Grossing · EducationFrance
  14. New version 3.0 (was 2.9)
  15. Entered the Grossing · Education chart at #96France
  16. Entered the Grossing · Education chart at #81Mexico
  17. Entered the Grossing · Education chart at #95Mexico
  18. Entered the Grossing · Education chart at #77India
  19. Climbed #77 → #45 in Grossing · EducationFrance
  20. Dropped #50 → #78 in Grossing · EducationFrance

About

Retainへようこそ。自分の教材を、効率よく学べる学習ツールに変えるAI勉強アプリです。学校、大学、独学のどれでも、Retainならもっと速く学び、しっかり身につけ、計画どおりに進められます。 使い方: 1. 教材をアップロード（PDF・画像・動画） 2. AIが作ったフラッシュカードを確認 3. 目標の成績と試験日を設定 4. あなた専用の学習プランに沿って勉強 Retainでできること: → PDF、スライド、手書きノートからフラッシュカードを自動作成 → YouTube動画やオンライン講義をフラッシュカードに変換 → 試験日と目標を設定して、あなた専用の学習プランを作成 → 毎日の学習目標を記録し、進み具合をグラフで確認 → Ankiのデッキを読み込み、学習データを全デバイスで同期 → 間隔反復とアクティブリコールで長期記憶を強化 →…

Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.

Retain Cards: KI-Karteikarten icon

Retain Cards: KI-Karteikarten

Retain Labs GmbH

Category: EducationIndie (reviewed)
Sign in to watchView on the App Store (opens in a new tab)Compare
Rankings updated
Best rank now#16Germany · Grossing · Education
Peak rank, 7 days#15Germany · Grossing · Education
Charts now3Across 2 countries
Rating2.5Out of 5 · 2 ratings
New ratings, 7 days—Needs a week of rating history
Longest chart run34 daysGermany · Grossing · Education

As of 10 Nov 2026, Retain Cards: KI-Karteikarten is #16 in Grossing · Education in Germany, its best of 3 chart positions across 2 countries. Over the last 7 days its biggest fall was 21 places, to #55 in Free · Education in France. Its best rank in the last 7 days was #15 in Grossing · Education in Germany. Appulse Index first saw Retain Cards: KI-Karteikarten in a tracked chart on 8 Oct 2026. Since then it has charted on 34 days in 8 countries, with a best rank of #10 in Free · Education in Germany on 25 Oct 2026.

Store listing

How the app presents itself on the App Store. Select a screenshot to open it full size.

Retain Cards: KI-Karteikarten screenshot 1 of 5Retain Cards: KI-Karteikarten screenshot 2 of 5Retain Cards: KI-Karteikarten screenshot 3 of 5Retain Cards: KI-Karteikarten screenshot 4 of 5Retain Cards: KI-Karteikarten screenshot 5 of 5

App facts

What Apple publishes about this app. Ratings are from one country's App Store.

Price
Free
Rating
2.5 / 5 stars2 ratings Japan
Released
7 May 2025
Last update
Version 3.0
Requires
iOS 15.0or later
Size
10.3 MB
Languages
15
Website
retain.cards (opens in a new tab)

Chart record

Every tracked chart, country and day since Appulse Index first saw this app in a chart.

Best rank ever#10Germany · Free · Education · 25 Oct 2026
Best in an overall chart—Not in an overall top 100 yet
Days in a chart34Since 8 Oct 2026
Countries charted in8Of 11 tracked

Rank history

Higher on the chart is better: #1 is at the top.

Sign in to see 30 days, 90 days and all history.

Germany · Grossing · Education: best #15, latest #16, over 7 snapshots since 4 Nov.

Germany · Grossing · Education: best #15, latest #16, over 7 snapshots since 4 Nov.

Current rankings

Every chart this app is in right now, best position first.

Retain Cards: KI-Karteikarten chart positions
ChartRank24 h7 daysBestDays on chart
Germany· Grossing · Education · best #14 · 34 days · 7 days Down 1 place#16Down 1 placeDown 1 place#1434
Germany· Free · Education · best #10 · 34 days · 7 days Down 4 places#22No changeDown 4 places#1034
France· Free · Education · best #28 · 34 days · 7 days Down 21 places#55Down 27 placesDown 21 places#2834

Ranking events

Entries, big moves, #1s and new versions we've recorded, by day.

    1. Dropped #28 → #55 in Free · EducationFrance

    1. Entered the Grossing · Education chart at #94Japan
    2. Climbed #84 → #56 in Grossing · EducationFrance
    3. Climbed #66 → #35 in Free · EducationFrance

    1. Dropped #56 → #84 in Grossing · EducationFrance

    1. Climbed #56 → #31 in Free · EducationFrance

    1. Dropped #34 → #59 in Grossing · EducationFrance

    1. Entered the Grossing · Education chart at #65Spain
    2. Climbed #64 → #34 in Grossing · EducationFrance
    3. Climbed #86 → #60 in Free · EducationFrance

    1. Climbed #82 → #45 in Grossing · EducationFrance

    1. Entered the Free · Education chart at #77Spain

    1. Entered the Free · Education chart at #97Spain
    2. Dropped #52 → #96 in Grossing · EducationFrance
    3. Climbed #44 → #13 in Free · EducationGermany

    1. Climbed #90 → #56 in Grossing · EducationFrance
    2. Entered the Free · Education chart at #96Canada

    1. Dropped #61 → #87 in Grossing · EducationFrance

    1. Climbed #87 → #59 in Grossing · EducationFrance

    1. New version 3.0 (was 2.9)
    2. Entered the Grossing · Education chart at #96France

    1. Entered the Grossing · Education chart at #81Mexico

    1. Entered the Grossing · Education chart at #95Mexico
    2. Entered the Grossing · Education chart at #77India
    3. Climbed #77 → #45 in Grossing · EducationFrance

    1. Dropped #50 → #78 in Grossing · EducationFrance

Competitors

Compare with the top 3Full chart

Top of Grossing · Education in Germany. Retain Cards: KI-Karteikarten is #16 there. Changes are over 7 days.

  1. #1 (number one)
    Duolingo: Learn Languages icon
    Duolingo: Learn LanguagesDuolingo
    No change
  2. #2
    Babbel - Language Learning icon
    Babbel - Language LearningBabbel GmbH
    No change
  3. #3
    Knowunity: AI Study & Homework icon
    Knowunity: AI Study & HomeworkKnowunity GmbH
    No change
  4. #4
    phase6 Vokabeltrainer icon
    phase6 Vokabeltrainerphase-6 GmbH
    No change
  5. #5
    Blinkist: Book Summaries Daily icon
    Blinkist: Book Summaries DailyBlinks Labs
    Up 2 places
  6. #6
    PictureThis - Plant Identifier icon
    PictureThis - Plant IdentifierGlority Global Group Ltd.
    Down 1 place
  7. #7
    Speak English with Loora AI icon
    Speak English with Loora AILoora A.I LTD
    Up 2 places
  8. #8
    Yuno: Daily Micro Learning icon
    Yuno: Daily Micro LearningGaiali GmbH
    No change
  9. #9
    Simply Piano: Learn Piano Fast icon
    Simply Piano: Learn Piano FastSimply Ltd
    Up 1 place
  10. #10
    Praktika – AI Language Tutor icon
    Praktika – AI Language TutorPraktika.ai Company
    Down 4 places
  11. #11
    Learna: Speak & Learn English icon
    Learna: Speak & Learn EnglishDEEP FLOW SOFTWARE SERVICES
    Up 1 place
  12. #12
    Quizlet: More than Flashcards icon
    Quizlet: More than FlashcardsQuizlet Inc
    Up 1 place
  13. #13
    Astra AI: Study & Exam Prep icon
    Astra AI: Study & Exam PrepAstra AI d.o.o.
    Up 1 place
  14. #14
    AnkiMobile Flashcards icon
    AnkiMobile FlashcardsAnki Software, LLC
    Up 3 places
  15. #15
    Busuu: Language Learning App icon
    Busuu: Language Learning AppBusuu Limited
    Up 3 places
  16. #16
    Retain Cards: KI-Karteikarten icon
    Retain Cards: KI-KarteikartenThis app
    Down 1 place
  17. #17
    Impulse - Brain Training icon
    Impulse - Brain TrainingGMRD Apps Limited
    Up 8 places
  18. #18
    sofatutor icon
    sofatutorsofatutor GmbH
    Down 7 places
  19. #19
    flowkey – Learn to Play Piano icon
    flowkey – Learn to Play Pianoflowkey GmbH
    Up 4 places
  20. #20
    Picture Mushroom: Identifier icon
    Picture Mushroom: IdentifierNext Vision Limited
    Down 4 places
  21. #21
    StudySmarter: KI Lern-App icon
    StudySmarter: KI Lern-AppStudySmarter GmbH
    Up 10 places

About

From the app's App Store listing.

Retainへようこそ。自分の教材を、効率よく学べる学習ツールに変えるAI勉強アプリです。学校、大学、独学のどれでも、Retainならもっと速く学び、しっかり身につけ、計画どおりに進められます。

使い方: 1. 教材をアップロード（PDF・画像・動画） 2. AIが作ったフラッシュカードを確認 3. 目標の成績と試験日を設定 4. あなた専用の学習プランに沿って勉強

Retainでできること: → PDF、スライド、手書きノートからフラッシュカードを自動作成 → YouTube動画やオンライン講義をフラッシュカードに変換 → 試験日と目標を設定して、あなた専用の学習プランを作成 → 毎日の学習目標を記録し、進み具合をグラフで確認 → Ankiのデッキを読み込み、学習データを全デバイスで同期 → 間隔反復とアクティブリコールで長期記憶を強化 →…

What's new

Version 3.0 · 15 Oct 2026 ·

学習セッションにボイスモードを追加しました。

Ranks come from Apple's public App Store charts, checked once a day. Appulse Index isn't affiliated with Apple.