Kak vs Digit Whisper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kak
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Kak is your ultimate verb-based guide to mastering Russian—verbs, grammar, vocabulary. Unlock the power of Russian language mastery with Kak, your ultimate verb-based guide. Dive into a world of over 5,000 fully conjugated Russian verbs, explore essential grammar and vocabulary lessons, and practice tasks. Key Features: - Comprehensive Verb Learning: Kak offers a vast collection of fully conjugated Russian verbs. Learn how to use them and understand their grammatical cases. - Grammar & Vocabulary Lessons: Enhance your language skills with detailed grammar and vocabulary lessons. Practice tasks ensure you grasp the concepts effectively. - Vocabulary Collections: Access over 500 phrases organized into useful collections for everyday conversations. - Grammar Case Tables: Navigate the complexities of Russian grammar cases effortlessly with our detailed tables. - Verb Search: Easily find verbs, their infinitive forms, conjugations, participles and learn their usage in sentences. - Audio Pronunciation: Listen to correct pronunciations for improved speaking skills. - AI-Powered Grammar Check (Beta): Benefit from advanced grammar checking to enhance your writing skills. Why Choose Kak: Kak is designed for learners at all levels, whether you're a beginner or looking to perfect your Russian skills. Our app is built on educational excellence and user-friendly design, making it your ideal language companion. Master the Russian language, verbs, grammar, and vocabulary effortlessly with Kak. Download today and embark on a rewarding journey to learn Russian!
Digit Whisper
Master number recognition in multiple languages through engaging, bite-sized gameplay. See a number word and tap the correct digits on a custom keypad. Track your progress and build streaks in a distraction-free environment.
- Multilingual number recognition
- Custom number pad input
- Progressive difficulty levels
- Streak and accuracy tracking
- Distraction-free interface
- Offline play
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Learn to recognize numbers in multiple languages — the fun way! DigitWhisper helps you master number recognition in German, Russian, and English through addictive, bite-sized gameplay. See a number word, tap the correct digits. It's that simple — but surprisingly challenging! HOW IT WORKS A random number appears as a word (e.g., "siebenundvierzig") Use the custom keypad to enter the digits (47) Get instant feedback and build your streak Progress through increasingly difficult levels FEATURES Three languages: German, Russian, English Custom number pad optimized for quick input Progressive difficulty levels from 0-100+ Track your streaks and accuracy Clean, distraction-free interface No ads, no subscriptions—just pure learning Works offline—practice anywhere, anytime Light and dark mode support PERFECT FOR Language learners building vocabulary Students practicing number recognition Travelers preparing for trips abroad Anyone wanting to sharpen their multilingual skills Parents teaching children numbers in different languages WHY DIGITWHISPER? Numbers are the foundation of any language, but they're often overlooked in traditional learning apps. DigitWhisper makes number recognition second nature through spaced repetition and active recall—proven learning techniques wrapped in engaging gameplay. Whether you're ordering coffee in Berlin, shopping in Moscow, or just expanding your mind, DigitWhisper gives you the confidence to understand numbers instantly in any language. Start your journey to multilingual number fluency today! Download DigitWhisper and transform those confusing number words into instant recognition.
Screenshots
Verdict
The clearest difference is iOS requirement: Kak at 13.0 against Digit Whisper's 18.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Kak ships an update every 3 days, Digit Whisper every 2 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.
| Parameter | Kak | Digit Whisper |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 86 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | INVALCRE (PRIVATE) LIMITED | Farkhod Yuldashev |
In-app purchases
Kak
No in-app purchases
Digit Whisper
No in-app purchases









