Grammatik Duell vs VOIZZR Pitch Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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+++ 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.
VOIZZR Pitch Analyzer
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This app is part of a research project of VOIZZR pitch analyzer. The aim of this research is to train AI models based on cough, breath, voice sounds, and phonetic speeches. In the future VOIZZR pitch analyzer will be your best buddy. VOIZZR pitch analyzer will help you to monitore signals in your voice. The app won't be tracking you and only collect this data when you actively interact with it. The data will be stored on VOIZZR servers. This app is available in English and German. More languages are in development. Terms of Use - Standard Apple Terms of Use (EULA) (Link: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)
Screenshots
Verdict
The clearest difference is price: VOIZZR Pitch Analyzer at Free against Grammatik Duell's $0.99. VOIZZR Pitch Analyzer also leads on update cadence (every 8 days vs every 2 months). Grammatik Duell's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
VOIZZR Pitch Analyzer is free to download; Grammatik Duell costs $0.99 up front. VOIZZR Pitch Analyzer sells 1 in-app purchase, starting at $0.99 per month. Grammatik Duell asks for nothing beyond the download.
Grammatik Duell ships an update every 2 months, VOIZZR Pitch Analyzer every 8 days. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.
| Parameter | Grammatik Duell | VOIZZR Pitch Analyzer |
|---|---|---|
| Price | $0.99 | Free — better |
| Positive reviews | 25.0% of reviews | — |
| Update frequency | Every 2 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 15 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Jan Essig | Technidoo UG |
In-app purchases
Grammatik Duell
No in-app purchases
VOIZZR Pitch Analyzer
- PRO Subscription$0.991 Month
Questions
Is Grammatik Duell free?
Is VOIZZR Pitch Analyzer free?
Do Grammatik Duell or VOIZZR Pitch Analyzer have ads?
Which is updated more often, Grammatik Duell or VOIZZR Pitch Analyzer?
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