# Krun - Spinner — Spin into visual illusions > Interactive digital pinwheel generating optical illusions through rotation. (iPhone/iPad app by Shinichiro Eto.) - Source: https://appshunter.io/ios/app/krun-spinner/id6757863339 (this page in markdown: same URL + `.md`) - Developer: [Shinichiro Eto](https://appshunter.io/developer/1864675097) - Category: Entertainment - Price: Free with in-app purchases - Rating: 1.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.6 · 6 MB - Languages: American English, French (France), German (Germany), Indonesian, Italian, Japanese, Korean, Brazilian Portuguese, European Spanish, Chinese (Traditional, Taiwan) and 1 more - Released: 2026-01-27 - Data updated: 2026-06-06 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/krun-spinner/id6757863339/reviews.md ## What is Krun? Spin a pinwheel and watch hidden shapes appear while it's moving. Swipe to spin, then enjoy optical illusions as the speed changes. Simple and intuitive for kids and adults. • Swipe-to-spin pinwheels • Illusions that appear as rotation slows • Shape, color, and speed customization • Premium: unlock all and remove ads ## Key features - Swipe-to-spin pinwheels - Illusions appear as rotation slows - Shape, color, and speed customization - Unlock all content - Remove ads ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Premium Unlock | $2.99 | one-time | ## Frequently asked questions about Krun ### What is Krun - Spinner? Krun - Spinner is an interactive digital pinwheel application that generates optical illusions as it spins and slows down. Users can swipe to spin and customize various visual elements. ### Does Krun - Spinner have ads? Yes, Krun - Spinner contains advertisements. Users can unlock all content and remove ads through a premium purchase. ### What devices does Krun - Spinner support? Krun - Spinner is available on Apple Watch, iPhone, and iPad, offering a versatile experience across different Apple devices. ### What is the age rating for Krun - Spinner? Krun - Spinner has an age rating of 4+, making it suitable for children and adults alike to enjoy its visual effects. ### How often is Krun - Spinner updated? The latest version of Krun - Spinner is 1.4.1, and it was last updated on March 22, 2026. This indicates a recent update, suggesting ongoing development. ### What customization options are available in Krun - Spinner? Users can customize the shape, color, and speed of the pinwheel. These options allow for a personalized visual experience as the illusions appear. ### Is Krun - Spinner available for free? Yes, Krun - Spinner is free to download and use. However, it offers in-app purchases for premium features like unlocking all content and removing ads. ### What do users like about Krun - Spinner? Based on the limited rating data, it's difficult to ascertain specific user sentiment. However, the app's description highlights its simple and intuitive nature for kids and adults, suggesting a positive user experience. ## Version history (last 5 releases) ### 1.4.1 — 2026-03-22 Fixed minor bugs. ### 1.4.0 — 2026-03-13 KRUN 1.4.0 This update focuses on improving usability and creating a more cohesive visual experience. We have significantly expanded the app's language support. In addition to Japanese and English, KRUN now supports Traditional Chinese, Korean, Indonesian, Spanish, Spanish (Latin America), Portuguese, Portuguese (Brazil), French, German, Italian, and Turkish. A new UI theme feature has been added. You can now change the overall look and feel of the app from Settings, including a return of the classic simple style. The Settings screen has been redesigned, with improved visuals for language selection, UI theme selection, and action buttons. The Favorites feature has been improved. Windmill scale is now saved as part of each favorite, making restored presets more consistent. The windmill zoom range has also been adjusted for easier and more flexible control. ### 1.3.0 — 2026-02-15 • Added a Favorites feature. You can now save up to 5 blade designs. • Added new designs: Advance 2 (3 types) — available for free. • Added new designs: Unique 2 (3 types) — added to Premium. • Added new colors: Flower & Fruit (2 types) — added to Premium. ### 1.2.1 — 2026-02-04 • Made minor fixes. ### 1.2.0 — 2026-02-03 • You can now change the size of the windmill using pinch-in and pinch-out gestures. • You can now spin the windmill on Apple Watch as well. • Added premium colors (3 types) and premium designs (4 types). ## More apps by Shinichiro Eto - [IdeaKeeper - Night to Dawn](https://appshunter.io/ios/app/ideakeeper-night-to-dawn/id6757116881) - [140h - ITエンジニアの稼働管理](https://appshunter.io/ios/app/140h-it/id6758903759) All apps by Shinichiro Eto: https://appshunter.io/developer/1864675097 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-06.*