風車 vs Krun
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
風車
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ふ〜っと吹くと回る風車です。 優しく吹くとゆっくり回り、沢山吹くと勢いよく回ります。 一人遊びで癒されてみたり、みんなで息が続く限り吹きまくったり。 背景を変えて気分転換。いろんな場所で回しましょう。 背景を変更できます。 ・カメラのライブ映像 ・黒または白 ・フォトライブラリーから選んだ写真 風車の数を変更できます。 ・5つまでの風車を同時に回せます ・それぞれの回転方向を変えられます 風車の画像を変更できます。 ・風車（ピンク） ・風車（グリーン） ・風車（モノトーン） ・風車（イエロー） ・風車（パープル） ピンチイン、ピンチアウトで風車の大きさを変更できます。
Krun
Engage with a digital pinwheel that creates captivating optical illusions as it spins and slows. Customize shapes, colors, and speed for a unique visual experience. It's a simple yet mesmerizing tool for all ages.
- Swipe-to-spin pinwheels
- Illusions appear as rotation slows
- Shape, color, and speed customization
- Unlock all content
- Remove ads
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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
Screenshots
Verdict
The clearest difference is in-app purchases: 風車 at none against Krun's 1. 風車 also leads on iOS requirement (10.0 vs 16.6). Krun's advantage is update cadence (every 3 days vs every 3 months). 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. Krun sells 1 one-off in-app purchase. 風車 asks for nothing beyond the download.
風車 ships an update every 3 months, Krun every 3 days. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.
| Parameter | 風車 | Krun |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 10.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 25 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Keietsu Yasuhara | Shinichiro Eto |
In-app purchases
風車
No in-app purchases
Krun
- Premium Unlock$2.99
