# Simple Trace Pro vs Moiré / Interference

The clearest difference is review sentiment: Moiré / Interference at 100% against Simple Trace Pro's 0%. Moiré / Interference also leads on rating (4.8 vs 3.0) and chart position (#198 vs unranked). Simple Trace Pro's advantage is update cadence (every 2 weeks vs every 19 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Simple Trace Pro costs $0.99 and Moiré / Interference $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 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 0% of Simple Trace Pro's written reviews are positive against 100% of Moiré / Interference's.

Simple Trace Pro ships an update every 2 weeks, Moiré / Interference every 19 months. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Simple Trace Pro | Moiré / Interference |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/simple-trace-pro/id1585591838/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/moire-interference/id6475648808/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 19 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#198** |
| Size | 1 MB | 29 MB |
| Requires iOS | **14.5** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kazuaki Matsuda](https://appshunter.io/developer/1560179759) | [Philippe Zay](https://appshunter.io/developer/1200498230) |

## What reviewers say

### Simple Trace Pro

[App page](https://appshunter.io/ios/app/simple-trace-pro/id1585591838)

Practice drawing and illustration by tracing photos and images. Load pictures from your camera roll and use Apple Pencil to refine your line work. Save your traced creations as JPGs or transparent PNGs.

**Highlights:** Trace photos and pictures, Practice illustration and painting, Load images from camera roll, Apple Pencil support, Adjustable transmittance, Zoom functionality, Save as JPG or transparent PNG

**Features:** macOS Compatibility

**In-app purchases:** none


### Moiré / Interference

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

**Currently charting:** #198 Top Paid · Graphics & Design (US App Store)

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


## Frequently asked questions

### Is Simple Trace Pro free?

Simple Trace Pro costs $0.99, with no in-app purchases.

### Is Moiré / Interference free?

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

### Which has better reviews, Simple Trace Pro or Moiré / Interference?

Moiré / Interference is rated higher. Simple Trace Pro averages 3.0 out of 5 from 2 ratings, while Moiré / Interference averages 4.8 from 4 ratings.

### Do Simple Trace Pro or Moiré / Interference have ads?

Neither Simple Trace Pro nor Moiré / Interference shows ads.

### Which is updated more often, Simple Trace Pro or Moiré / Interference?

Simple Trace Pro ships an update every 2 weeks, and Moiré / Interference every 19 months. Most recently, Simple Trace Pro was updated on September 9, 2026 and Moiré / Interference on September 22, 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.*