Wuko Math vs KotoVelluna
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Wuko Math
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Học toán vui như chơi cùng Wuko! Mỗi bài chỉ 5 câu, đủ ngắn để bé tập trung và đủ vui để muốn học tiếp. WUKO MATH GIÚP BÉ • Đếm và nhận biết số lượng • Làm quen phép cộng, phép trừ • Tìm quy luật và rèn tư duy hình ảnh • Luyện tính nhanh qua 20 câu tốc độ • Phản xạ tốt hơn với bài tập vừa sức CÂY TRÍ TUỆ LỚN CÙNG BÉ Mỗi bài hoàn thành giúp cây đi từ mầm nhỏ thành cây lớn. Ôn bài nhận hoa, tính nhanh nhận quả và sưu tập huy hiệu toán học. Bé nhìn thấy tiến bộ của mình sau mỗi lần chơi. HỌC NGẮN, PHẢN HỒI RÕ Mỗi bài học gồm 5 câu với hình minh họa lớn và đáp án dễ chạm. Wuko cổ vũ khi bé làm đúng và gợi ý nhẹ nhàng khi cần thử lại. DÀNH CHO GIA ĐÌNH • 12 bài học, 60 câu hỏi có sẵn • Hoạt động offline, không cần Internet • Không quảng cáo, không mua trong ứng dụng • Không cần tài khoản • Không theo dõi, không thu thập dữ liệu • Tiến độ chỉ lưu trên thiết bị • Khu vực phụ huynh giúp xem tiến độ và đặt mục tiêu thời lượng Wuko Math phù hợp cho trẻ mẫu giáo lớn và bé 5–7 tuổi đang làm quen với đếm số, cộng trừ và tư duy toán học. Tải Wuko Math và cùng bé bắt đầu 5 câu toán vui mỗi ngày!
KotoVelluna
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KotoVelluna is a playful vocabulary app for children from age 2. Look at pictures, listen to words, and connect them in a word-chain puzzle. The app supports learning Japanese, English, and Vietnamese. The interface and help are available in 36 languages: Japanese, English, Vietnamese, Simplified Chinese, Traditional Chinese, Indonesian, Korean, Thai, Filipino, Hindi, Burmese, Malay, Brazilian Portuguese, French, German, Spanish, Nepali, Persian, Bengali, Urdu, Arabic, Polish, Swedish, Finnish, Lithuanian, Italian, Dutch, Turkish, Danish, Norwegian, Czech, Romanian, Sinhala, Tamil, Khmer and Mongolian. Learning content is available in three languages: Japanese, English and Vietnamese. ■ Learn with pictures and audio Tap a tile to see a picture and hear the word. Children can become familiar with words by looking and listening, even before they can read. ■ Play a word-chain puzzle Move neighboring tiles to connect the end of one word to the beginning of the next. Pictures and audio provide helpful clues while children play. ■ Choose settings for each child Listening levels and Japanese or English word-chain levels can be selected separately. Vietnamese word-chain play is not divided into levels. A letter-helper setting lets parents adjust the amount of support. ■ Make time to think in the age of AI As AI becomes part of everyday life, make time for children to think for themselves. Word-chain puzzles put your thinking to the test as you recall words and work out which ones connect. With pictures and audio as clues, children can ask, “Which word comes next?” and enjoy that “I did it!” moment when the words fit together. Reduce the letter clues to enjoy the puzzle as a listening and memory game. It’s not just word play for children—it’s a fun brain workout for adults, too. Why not put your heads together and enjoy some family puzzle time? The free version includes 15 listening words and 20 word-chain words in the base learning language. It is not a time-limited free trial. Premium is a paid monthly or yearly subscription that gives access to all words and levels in Japanese, English and Vietnamese. There are no ads. One-time purchases are not subscriptions. Each V1 learning purchase unlocks only that language’s words, levels and current V1 paid features, without an expiry date. Other learning languages are separate purchases. Choose among 36 display languages. This does not unlock learning content in other languages. Requires at least one V1 learning-language purchase. Switch with active Premium, or with a V1 learning-language purchase and the translation pack. Bug fixes and minor improvements may be provided. Maintenance, updates and support for new OS versions may end for older versions. Features added in V2 or later require a separate purchase. Buying V1 does not automatically cancel an active subscription. If you no longer need it, cancel or manage it separately in the App Store. Current prices are campaign prices. No end date or post-campaign prices have been decided. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ray-app-lab.sakura.ne.jp/wordchain/privacy_policy.html#en
Screenshots
Verdict
The clearest difference is in-app purchases: Wuko Math at none against KotoVelluna's 8. Wuko Math also leads on update cadence (weekly vs every 3 weeks). KotoVelluna's advantage is iOS requirement (13.0 vs 15.0). 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. KotoVelluna sells 8 in-app purchases, starting at $0.99 per month. Wuko Math asks for nothing beyond the download.
Wuko Math ships an update weekly, KotoVelluna every 3 weeks. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.
| Parameter | Wuko Math | KotoVelluna |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 163 MB |
| Age rating | 4+ | 4+ |
| Developer | Dung Nguyen Tien | masahiro ito |
In-app purchases
Wuko Math
No in-app purchases
KotoVelluna
- Monthly Premium$0.991 Month
- Monthly Premium$1.991 Month
- Yearly Premium$8.991 Year
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- Yearly Premium$14.991 Year
- V1 translation pack$2.99
- Japanese — V1$9.99
- English — V1$9.99
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- Vietnamese — V1$9.99









