Jiru vs PolyDigits
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jiru
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LEARN GERMAN THROUGH AN IMMERSIVE STORY-DRIVEN ADVENTURE Jiru is not just another language-learning app—it’s an interactive experience that helps you learn German through storytelling, structured repetition, and interactive exercises. Follow Jiru’s journey, explore different chapters, and master useful words and phrases naturally. A UNIQUE APPROACH TO LANGUAGE LEARNING Traditional language apps rely on memorization and grammar drills. Jiru takes a different approach by integrating narrative-based learning, interactive flashcards, and scientifically backed memory techniques to make learning intuitive and engaging. WHAT MAKES JIRU DIFFERENT? • Story-Driven Learning – Learn German as you follow Jiru’s adventure through different chapters, encountering words and phrases in real-life contexts. • Interactive Flashcards – Reinforce your learning with a spaced repetition system (SRS) that ensures long-term retention. • Customizable Jiru – Personalize Jiru’s look and make the learning experience your own. • Audio Narration – Improve pronunciation and listening skills with clear, professional voiceovers. • Progressive Challenges – Start with simple phrases and gradually advance to practical conversations. • Exploration-Based Learning – Navigate Jiru’s world through a chapter-based map, unlocking new content as you progress. THE SCIENCE BEHIND JIRU’S FLASHCARDS Jiru’s flashcard system is based on spaced repetition, a proven technique that helps learners retain vocabulary more effectively by reviewing words at strategic intervals. Studies show that active recall and spaced exposure strengthen neural connections, making it easier to remember words long-term. Unlike passive memorization, interactive flashcards engage the brain, reinforcing learning through context and repetition. A LANGUAGE ADVENTURE FOR EVERYONE Whether you're a beginner or refreshing your skills, Jiru makes learning German more accessible. By combining contextual storytelling, structured repetition, and interactive practice, the app helps you build confidence in reading, listening, and speaking. WHY JIRU WORKS Research in language acquisition highlights the importance of context-based learning—where new words are introduced through meaningful interactions rather than isolated lists. Jiru’s method ensures that vocabulary and phrases are not just memorized but truly understood, making it easier to use them in real conversations. START YOUR JOURNEY TODAY Embark on a new way to learn German—one that makes language learning fun, interactive, and effective. Download Jiru now and take your first step toward fluency.
PolyDigits
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PolyDigits — Master numbers in any language Numbers are the fastest way to feel confident in a language: prices, times, addresses, quantities. PolyDigits trains exactly that — with active drills instead of passive studying. Three ways to practice: • Listen/Drill: Hear a number → type it → check instantly. • Flash Mode: Reveal and listen when you’re ready. • Math: Train mental math and automate number fluency along the way. Why it works • Authentic pronunciation: Uses your iPhone’s native text-to-speech voice. • Focused & simple: No fluff — just training. • Progress you can see: Track what you’ve done each day. Completely free No ads. No locked features. If you want, you can buy me a coffee :) Private: no accounts, no data sharing (everything stays on-device).
Screenshots
Verdict
The clearest difference is in-app purchases: Jiru at none against PolyDigits's 4. Jiru also leads on iOS requirement (15.1 vs 26). On price, ads and device support 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
Both are free to download. PolyDigits sells 4 in-app purchases, starting at $1.99 per month. Jiru asks for nothing beyond the download.
| Parameter | Jiru | PolyDigits |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26 |
| Further details — not scored | ||
| Size | 36 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrii Turkin | Daniel Kwetschas |
In-app purchases
Jiru
No in-app purchases
PolyDigits
- Coffee Subscription$1.991 Month
- Small Coffee$2.99
- Medium Coffee$3.99
- Large Coffee$5.99









