Study Hack vs Keylingual
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Study Hack
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Study Hack - Your AI Study Partner Transform your study materials into an effective learning experience with Study Hack, your intelligent study companion powered by advanced AI technology. KEY FEATURES Smart Study Materials – Upload any PDF document – Get AI-generated comprehensive summaries – Create interactive flashcards automatically – Generate practice quizzes – Support for multiple subjects and topics Instant Homework Help – Take a photo of any homework problem – Get step-by-step solutions – Smart text extraction and analysis – Support for math, science, and more – Available in multiple languages Interactive Learning Tools – Customizable flashcard sets – Progress tracking – Spaced repetition learning – Print-friendly study materials – Cross-device synchronization Language Support – Available in 38+ languages – Multi-language content processing PERFECT FOR – Students (High School & University) – Test Preparation (SAT, ACT, GRE, etc.) – Language Learners – Professional Certification – Self-Learners – Teachers and Educators Start transforming your study experience today with Study Hack – Your AI-powered study partner! Note: Some features require a subscription. Subscriptions automatically renew unless canceled before the renewal date. Terms of Service: https://studyhack.net/terms Privacy Policy: https://studyhack.net/privacy
Keylingual
This app integrates language learning directly into your typing experience. It provides translations above word suggestions and allows for full sentence translation, making communication in other languages seamless. Track your progress and build vocabulary effortlessly.
- Real-time word translations above suggestions
- Full sentence translation (10 free daily)
- Pronunciation and meaning lookup
- iOS keyboard integration
- Typing statistics and vocabulary record
- Open source and privacy-focused
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Keylingual turns the typing you already do into language practice. Type in English as usual. Above every suggestion you see the same word in the language you are learning: Spanish, French, German, Portuguese, Italian, Japanese or Chinese. Tap the translation to type it instead. Need to send a message in another language? Tap the translate button and the whole sentence becomes your learning language, ready to send. Got a reply you don't understand? Type it and tap translate to read it in English. Chatting with suppliers, customers, friends or hosts abroad has never been this quick. FEATURES • Translations above every suggestion, computed on your device, no internet needed • Whole-sentence translation into 7 languages with one tap, and back into English (10 a day free, unlimited with Keylingual Pro) • Hold any suggestion to see all its meanings and hear the pronunciation • Looks and feels like the built-in iOS keyboard: autocorrect, next-word suggestions, emoji with search and skin tones, six themes • Learns the words you use most and suggests them first; what it learns stays on your iPhone • Names from your contacts are never corrected away • Pinyin mode for learners of Chinese • Speak Spanish, French or German? Learn English with a keyboard in your language that adds the accents for you, with QWERTZ and ü ö ä for German and AZERTY in France • Typing statistics and a vocabulary record of the words you have seen • Interface in English, Spanish, French, German, Portuguese, Italian, Japanese and Chinese PRIVACY Everything you type stays on your phone. Only the sentences you explicitly ask to translate are sent to our translation service, and they are not stored. An email sign-in is needed only for whole-sentence translation; everything else works without an account. No ads, no tracking. Keylingual is open source. KEYLINGUAL PRO Keylingual Pro is an auto-renewing subscription that removes the daily limit on whole-sentence translation. Payment is charged to your Apple Account and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it in your Apple Account settings. Terms of Use: https://keylingual-api.vercel.app/terms.html Privacy Policy: https://keylingual-api.vercel.app/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: Keylingual at every 2 days against Study Hack's monthly. On price, ads, in-app purchases 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. Study Hack sells 2 in-app purchases, starting at $9.99 per month and Keylingual sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Study Hack ships an update monthly, Keylingual every 2 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.
| Parameter | Study Hack | Keylingual |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 25 MB | 167 MB |
| Age rating | 4+ | 4+ |
| Developer | Nayef Alzaid | Jiaying Xue |
In-app purchases
Study Hack
- Scholar Plan3 Days trial$9.991 Month
- Master Plan$15.991 Month
Keylingual
- Pro Monthly$4.991 Month
- Pro Yearly$29.991 Year





