# Moiré / Interference vs Rikka

The clearest difference is price: Rikka at Free against Moiré / Interference's $0.99. Rikka also leads on update cadence (weekly vs every 19 months). Moiré / Interference's advantage is rating (4.8 vs 4.0) and ads (none vs shown). On ratings volume, in-app purchases, device support and iOS requirement there is nothing between them.

Rikka is free to download; Moiré / Interference costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Moiré / Interference holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

Moiré / Interference ships an update every 19 months, Rikka weekly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Moiré / Interference | Rikka |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/moire-interference/id6475648808/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/rikka-shape-the-worlds-snow/id6736791492/reviews) |
| Number of ratings | **4** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 19 months | **Weekly** |
| Monetization | Paid | **Ad-supported** |
| Size | 29 MB | 24 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Philippe Zay](https://appshunter.io/developer/1200498230) | [ONTRAILS](https://appshunter.io/developer/1570756171) |

## What reviewers say

### Moiré / Interference

[App page](https://appshunter.io/ios/app/moire-interference/id6475648808)

Generate and explore dynamic Moiré patterns with animated visuals. Combine different shapes, customize colors, and interact with 3D controls for a unique artistic experience. Perfect for creative minds and pattern enthusiasts.

**Highlights:** Animated Moiré patterns, Pause and play animations, Layered pattern combinations, Interactive 3D controls, Customizable colors and settings, High-quality graphics

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

**In-app purchases:** none


### Rikka

[App page](https://appshunter.io/ios/app/rikka-shape-the-worlds-snow/id6736791492)

Witness the real-time growth of unique, six-fold symmetric crystals based on live weather data from snowy cities. Explore how temperature, humidity, wind, and pressure influence crystal complexity and density. Each crystal's origin city is displayed, allowing you to locate it on a map.

**Highlights:** Real-time crystal growth simulation, Live global weather data integration, Crystals shaped by temperature, humidity, wind, and pressure, Unique, six-fold symmetric designs, Origin city identification and mapping, Algorithmically generated natural art

**In-app purchases:** none


## Frequently asked questions

### Is Moiré / Interference free?

Moiré / Interference costs $0.99, with no in-app purchases.

### Is Rikka free?

Rikka is free to download, with no in-app purchases.

### Which has better reviews, Moiré / Interference or Rikka?

Moiré / Interference is rated higher. Moiré / Interference averages 4.8 out of 5 from 4 ratings, while Rikka averages 4.0 from 3 ratings.

### Do Moiré / Interference or Rikka have ads?

Rikka shows ads; Moiré / Interference does not.

### Which is updated more often, Moiré / Interference or Rikka?

Moiré / Interference ships an update every 19 months, and Rikka weekly. Most recently, Moiré / Interference was updated on October 30, 2026 and Rikka on October 24, 2026.

---

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