Comparison

Grammatik Duell vs knotecards

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Grammatik Duell

Practice German grammar and spelling through an engaging matching game. Choose from various grammatical areas and difficulty levels to improve your language skills. Compete against yourself or others in this fun, educational duel.

Highlights
  • German grammar and spelling practice
  • Matching game mechanics
  • Variable card pairs and player numbers
  • Adjustable difficulty levels
  • Read-aloud function
  • Focuses on grammatical areas
  • Reward system for motivation
Features
Read full description

+++ Dyslexia Quality Award Winner 2015 +++ This entertaining and educational matching game app helps you practice your German grammar and spelling in a fun way. Whether you need to brush up on parts of speech, conjugation or declination, tenses and types of sentences - no matter what you need, the various grammatical areas can be combined with each other and practiced. With one click, the appropriate themes are chosen, easy as pie, and you can start right away. Matching pairs must be found, either by purely assigning terms to the proper categories (intelligent = Adjektiv | Ich werde spielen = Futur 1) or as a concentration-enhancing matching game. THE GRAMMATIK DUELL HELPS YOU PRACTICE YOUR KNOWLEDGE IN A FUN WAY Both the number of card pairs and the number of players are, of course, variable. Depending on your wishes, the cards can be read aloud, and the length of time in which the cards are revealed is adjustable. The difficulty level of the app increases with the number of card pairs and the chosen area of grammar. It is aimed at all students who are not yet entirely comfortable in their use of grammatical terms or who want to practice for their next grammar lesson in a fun way. You can also work on improving your spelling. STRONG MOTIVATION TO LEARN GRAMMAR On your own in a race against time or against a challenging opponent - who will use the fewest number of moves to find the matching pairs? Who will collect the most stars and end up the winner in this grammatical duel? The beautiful visual presentation of the playing cards, the acoustic sounds of success, the pleasing voice that reads aloud, the game variations, the pedagogically sophisticated content and the strict limitations of only relevant content make this app a truly worthwhile learning aid. The Grammar Challenge makes learning grammar fun! PEDAGOGICAL BENEFITS OF THE APP: • Self-explanatory • Concentrates on the content without distractions • Motivates with a reward system • Practice mode • Boosts concentration skills • Selectable levels of difficulty • Selectable number of card pairs • Selectable read-aloud function • Selectable areas of grammar • “Assignable” game variations • Beautiful, relevant graphics • No in-app purchases • No online connection necessary • Learning psychology tested and approved TECHNICAL AND PEDAGOGICAL KNOW-HOW COME TOGETHER IN THE GRAMMATIK DUELL The idea for this app with regard to its content was created by licensed pedagogue Uta Reimann-Höhn (www.lernfoerderung.de), who has published numerous books as an expert on education and upbringing, and who has been the editor-in-chief of “Lernen und fördern mit Spaß!” (“Learn and Grow with Fun!”) since 2006. The idea was implemented by Jan Essig (www.janessig.com), a designer who has made a name for himself with his high-quality educational apps “Adventure Playground” and “Preschoolers ABC Playground” and has won numerous awards.

About

knotecards

Prepare for your Private Pilot Checkride with flashcards created by Certified Flight Instructors. This study tool covers ACS standards and includes sources for accurate information. Organize cards by knowledge level for efficient learning.

Highlights
  • Flashcards designed by CFIs
  • Covers ACS Standards
  • Includes sources for accuracy
  • Systematic and weighted card viewing
  • Covers 141 curriculum areas
Features
Currently charting
Read full description

Study for your Private Pilot Checkride with Knotecards! Flashcards designed by CFIs to ACS Standards. Knotecards is a study tool for your Private Pilot Certificate made by Certified Flight Instructors. Each flashcard includes sources, so you can be sure the information you’re memorizing is accurate, and read more deeply for further understanding. The database of flashcards can be viewed systematically, or weighted based on whether you’ve marked each card as known or unknown. The content is designed based off of the ACS and 141 curriculum to ensure each potential area of the Private Pilot oral exam is covered. With years of flying experience from experts built into Knotecards, you can be sure you’re thoroughly prepared for the private pilot check ride.

Screenshots

Grammatik Duell4 screens
knotecards4 screens

Verdict

The call

The clearest difference is review sentiment: knotecards at 100% against Grammatik Duell's 25%. knotecards also leads on chart position (#168 vs unranked). Grammatik Duell's advantage is price ($0.99 vs $3.99) and iOS requirement (12.0 vs 17.6). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Grammatik Duell costs $0.99 and knotecards $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Grammatik Duell ships an update every 2 months, knotecards every 6 weeks. The most recent releases landed on September 7, 2026 and August 31, 2026 respectively.

Scorecard4 real differences · 7 level
Grammatik Duell versus knotecards: the parameters behind the verdict, then further details
ParameterGrammatik Duellknotecards
Price$0.99 — better$3.99
Rating—4.5 (2 ratings) — better
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings—2 — better
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#168 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size15 MB1 MB
Age rating4+12+
DeveloperJan EssigAltymytry Ltd.

Customer experience

Grammatik Duell

Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

knotecards

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grammatik Duell

No in-app purchases

None

knotecards

No in-app purchases

Questions

Is Grammatik Duell free?
Grammatik Duell costs $0.99, with no in-app purchases.
Is knotecards free?
knotecards costs $3.99, with no in-app purchases.
Do Grammatik Duell or knotecards have ads?
Neither Grammatik Duell nor knotecards shows ads.
Which is updated more often, Grammatik Duell or knotecards?
Grammatik Duell ships an update every 2 months, and knotecards every 6 weeks. Most recently, Grammatik Duell was updated on September 7, 2026 and knotecards on August 31, 2026.

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