# 聴速mimix vs ガス溶接作業主任者

The clearest difference is review sentiment: 聴速mimix at 49% against ガス溶接作業主任者's 0%. 聴速mimix also leads on in-app purchases (none vs 1) and iOS requirement (9.0 vs 16.0). ガス溶接作業主任者's advantage is update cadence (every 6 days vs every 22 months). On price, ads and device support there is nothing between them.

Both are free to download. ガス溶接作業主任者 sells 1 one-off in-app purchase. 聴速mimix asks for nothing beyond the download.

聴速mimix ships an update every 22 months, ガス溶接作業主任者 every 6 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 聴速mimix | ガス溶接作業主任者 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **48.9% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 6 days** |
| Monetization | **Free** | Freemium |
| Size | 4 MB | 5 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Samark Corporation](https://appshunter.io/developer/673041246) | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) |

## What reviewers say

### 聴速mimix

[App page](https://appshunter.io/ios/app/mimix/id673062573)

This music player allows precise control over playback speed, from 0.1x to 8.0x. It's useful for language learning, improving memory and concentration, and transcribing music. Note that some DRM-protected audio may not be playable.

**Highlights:** Adjustable playback speed (0.1x to 8.0x), 10-second rewind/forward, Single track repeat, Speed shortcut buttons, Independent sliders for position, volume, and speed

**Features:** macOS Compatibility

**In-app purchases:** none


### ガス溶接作業主任者

[App page](https://appshunter.io/ios/app/id6757180464)

This app provides comprehensive study materials for the Certified Gas Welder exam. It features approximately 500 practice questions with detailed explanations, progress tracking, and flexible study modes. Learn efficiently anytime, anywhere, even offline.

**Highlights:** 500+ practice questions, Detailed explanations, Progress tracking, Customizable study modes, Offline access, Intuitive user interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ガス溶接作業主任者 試験対策 | $1.99 | one-time |


## Frequently asked questions

### Is 聴速mimix free?

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

### Is ガス溶接作業主任者 free?

ガス溶接作業主任者 is free to download, with in-app purchases available.

### Do 聴速mimix or ガス溶接作業主任者 have ads?

Neither 聴速mimix nor ガス溶接作業主任者 shows ads.

### Which is updated more often, 聴速mimix or ガス溶接作業主任者?

聴速mimix ships an update every 22 months, and ガス溶接作業主任者 every 6 days. Most recently, 聴速mimix was updated on October 24, 2026 and ガス溶接作業主任者 on October 28, 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.*