# 放天燈 AR vs Krun

The clearest difference is rating: Krun at 3.0 against 放天燈 AR's 1.0. Krun also leads on update cadence (every 3 days vs every 18 months). 放天燈 AR's advantage is in-app purchases (none vs 1) and ads (none vs shown). 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. 放天燈 AR asks for nothing beyond the download.

Krun holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

放天燈 AR ships an update every 18 months, Krun every 3 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 放天燈 AR | Krun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/ar/id1203327395/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/krun-spinner/id6757863339/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 246 MB | 6 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Feng Ping Wang](https://appshunter.io/developer/1156188524) | [Shinichiro Eto](https://appshunter.io/developer/1864675097) |

## What reviewers say

### 放天燈 AR

[App page](https://appshunter.io/ios/app/ar/id1203327395)

Experience the joy of releasing sky lanterns virtually, anytime and anywhere. This app offers an eco-friendly alternative to traditional sky lanterns, eliminating concerns about environmental pollution and fire hazards.

**Highlights:** Virtual sky lantern release, Eco-friendly alternative, No environmental pollution, No fire hazards, Available anytime, anywhere

**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 放天燈 AR free?

放天燈 AR 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, 放天燈 AR or Krun?

Krun is rated higher. 放天燈 AR averages 1.0 out of 5 from 1 ratings, while Krun averages 3.0 from 2 ratings.

### Do 放天燈 AR or Krun have ads?

Krun shows ads; 放天燈 AR does not.

### Which is updated more often, 放天燈 AR or Krun?

放天燈 AR ships an update every 18 months, and Krun every 3 days. Most recently, 放天燈 AR was updated on October 19, 2026 and Krun on October 24, 2026.

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