Comparison

KyouStudy vs mellow

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

Head to head
About

KyouStudy

Features
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Learn as much as you want, at your own pace. KyouStudy helps you build language skills for exam preparation and everyday learning. Whether you are preparing for JLPT, HSK, or TOPIK, or exploring a new language, start at a level that suits you and move from words to sentences, practice, and review. FREE LEARNING, WITHOUT DAILY LIMITS Study from beginning to end without daily study caps or restrictions on the scope of available learning content. Core learning stays free, whether or not you choose Premium. DISCOVER WORDS THROUGH CARDS Explore vocabulary, characters, expressions, and sentences organized by exam and level. Learn meanings, examples, and pronunciation together, then mark what you already know and what you want to study further. SEE IT. HEAR IT. REMEMBER IT. Listen to word and sentence pronunciation with AI-powered audio. Every example sentence comes with an image to help you connect its meaning with a scene and make it easier to recall. CHOOSE HOW YOU PRACTICE Use quizzes for instant feedback after each question, or test mode to receive your score after completing all questions. • Multiple choice: connect characters, readings, and meanings. • Listening: hear a word or sentence and choose the answer. • Matching: draw connections between expressions and meanings. • Sentence ordering and gap filling: practice context and sentence structure. • Typed answers: recall words and expressions without answer choices. TURN MISTAKES INTO PROGRESS Revisit questions in your mistake notebook and save useful items to favorites. Unlock collections as you learn and use study statistics to see your progress. MAKE IT YOUR OWN WITH PREMIUM Optional paid Premium benefits include ad removal, additional themes, detailed information about related words, and support for continued development. Your daily study amount and the scope of available learning content remain unrestricted without Premium. LANGUAGES AND CONNECTION The interface is available in English, Korean, Japanese, Simplified Chinese, and Traditional Chinese. An internet connection through Wi-Fi or mobile data is required for a smooth learning experience. MORE TO LEARN OVER TIME The exam lineup includes JLPT, TOEIC, TOEFL, IELTS, HSK, TOCFL, and TOPIK, with some courses planned for future updates. TOEIC, TOEFL, and IELTS are planned additions. Check the app for currently available courses. Built and cared for by an independent developer, KyouStudy grows with your feedback. Start with one word and keep learning at your own pace. KyouStudy is an independent learning tool and is not affiliated with or endorsed by the organizations that administer these exams. Exam names and trademarks belong to their respective owners. Support: https://www.kyoustudy.com/contact/ Privacy Policy: https://www.kyoustudy.com/privacy-policy/ Terms of Use: https://www.kyoustudy.com/terms-of-use/ Apple Standard End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

mellow

Features
Read full description

Practising a language is rarely a question of time. It is a question of starting. mellow turns that around: instead of opening an app, you answer a call. The call comes to you Eight in the morning, seven on the way home — pick the days and the hour, and the phone rings then. Answer and the conversation is already under way. There is no moment left in which to decide whether today is the day. 8 languages, 19 friends English, Japanese, Chinese, Spanish, French, German, Portuguese and Korean, each with friends who have their own personality and way of talking. Help in your own language The app, in-call translations, hints and learning reports come in your language. Stuck for words? A hint shows two things you could say next. A real call Voice, not typing. Your friend speaks, you answer, and it answers back without waiting for you to finish typing. It runs at the pace of a real call, which is the part that is hard to practise anywhere else. Each friend talks differently Each one talks differently. One waits while you find the word; another keeps the pace up. Pick whoever suits the day. Set the scene Write the situation you want — ordering at a café, introducing yourself in an interview — and the conversation goes there. What you keep A report arrives when the call ends: where you got stuck, and how the sentence would have sounded more naturally, line by line. The corrections become review cards, and they come back around when you are about to forget them. Free to use Two calls a week, five minutes each. They come back every Monday. Subscribe if you want to talk more: 300 minutes a month, up to 60 minutes a call. Worth knowing Your conversation partner is an AI, not a person. Your voice and conversation are sent to OpenAI for speech recognition, conversation and learning feedback. AI replies and review expressions are sent to OpenAI or Google Gemini for speech synthesis; replies may contain your name or conversation details. The app asks for your consent before calls or scheduling. Decline and non-call features remain available. Subscription mellow Membership is a monthly or yearly auto-renewable subscription; prices are shown in the app. Payment is charged to your Apple ID account at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel it in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of service: https://www.mellowcall.com/en/terms Privacy policy: https://www.mellowcall.com/en/privacy

Screenshots

KyouStudy4 screens
mellow4 screens

Verdict

The call

The clearest difference is ads: mellow at none against KyouStudy's shown. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KyouStudy sells 3 in-app purchases, starting at $3.99 per month and mellow sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 12, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 5 level
KyouStudy versus mellow: the parameters behind the verdict, then further details
ParameterKyouStudymellow
PriceFreeFree
Update frequencyWeeklyWeekly
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size229 MB129 MB
Age rating4+17+
DeveloperHungBokNullge

In-app purchases

3 purchases

KyouStudy

Subscriptions2
  • KyouStudy Premium$3.991 Month
  • KyouStudy Premium (Annual)$39.991 Year
One-time1
  • KyouStudy Premium (Lifetime)$99.99
2 purchases

mellow

Subscriptions2
  • mellow Membership Monthly$7.991 Month
  • mellow Membership Yearly$59.991 Year

Questions

Is KyouStudy free?
KyouStudy is free to download, with in-app purchases available.
Is mellow free?
mellow is free to download, with in-app purchases available.
Do KyouStudy or mellow have ads?
KyouStudy shows ads; mellow does not.
Which is updated more often, KyouStudy or mellow?
KyouStudy ships an update weekly, and mellow weekly. Most recently, KyouStudy was updated on November 12, 2026 and mellow on November 6, 2026.

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