# 3D Spinner vs Krun

The clearest difference is rating: 3D Spinner at 5.0 against Krun's 1.0. 3D Spinner also leads on in-app purchases (none vs 1) and ads (none vs shown). Krun's advantage is update cadence (every 3 days vs every 42 months). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Krun sells 1 one-off in-app purchase. 3D Spinner asks for nothing beyond the download.

3D Spinner holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

3D Spinner ships an update every 42 months, Krun every 3 days. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 3D Spinner | Krun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/3d-spinner/id1244753657/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/krun-spinner/id6757863339/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 42 months | **Every 3 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 59 MB | 6 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [DemonStudios](https://appshunter.io/developer/393340343) | [Shinichiro Eto](https://appshunter.io/developer/1864675097) |

## What reviewers say

### 3D Spinner

[App page](https://appshunter.io/ios/app/3d-spinner/id1244753657)

Experience the most realistic virtual fidget spinner with lifelike physics, 3D graphics, and sound. Interact with various spinners, explore different materials and bearings, and enjoy simulated vibrations for an immersive experience.

**Highlights:** Realistic 3D graphics and sound, Lifelike physics and spin times, Variety of spinner materials and bearings, Simulated vibration effects, Gyroscope and accelerometer interaction, Adjustable RPM and spin time display

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Krun

[App page](https://appshunter.io/ios/app/krun-spinner/id6757863339)

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.

**Highlights:** Swipe-to-spin pinwheels, Illusions appear as rotation slows, Shape, color, and speed customization, Unlock all content, Remove ads

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $2.99 | one-time |


## Frequently asked questions

### Is 3D Spinner free?

3D Spinner is free to download, with no in-app purchases.

### Is Krun free?

Krun is free to download, with in-app purchases available.

### Which has better reviews, 3D Spinner or Krun?

3D Spinner is rated higher. 3D Spinner averages 5.0 out of 5 from 2 ratings, while Krun averages 1.0 from 1 ratings.

### Do 3D Spinner or Krun have ads?

Krun shows ads; 3D Spinner does not.

### Which is updated more often, 3D Spinner or Krun?

3D Spinner ships an update every 42 months, and Krun every 3 days. Most recently, 3D Spinner was updated on October 4, 2026 and Krun on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*