# Quality Valve vs Charm

The clearest difference is update cadence: Charm at every 4 weeks against Quality Valve's every 8 months. Quality Valve's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Quality Valve ships an update every 8 months, Charm every 4 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | Quality Valve | Charm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quality-valve/id635286009/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 21 MB | 14 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Quality Valve, Inc](https://appshunter.io/developer/635286012) | [Opilio Software LLC](https://appshunter.io/developer/375973691) |

## What reviewers say

### Quality Valve

[App page](https://appshunter.io/ios/app/quality-valve/id635286009)

This app facilitates quote requests for OEM relief valve replacement parts, catering exclusively to valve repair companies and factory service centers. It streamlines the process of obtaining necessary components for the valve repair industry.

**Highlights:** OEM relief valve replacement parts, Quote request functionality, Direct sales to repair companies, Industry-specific focus, Streamlined parts procurement

**Features:** macOS Compatibility

**In-app purchases:** none


### Charm

[App page](https://appshunter.io/ios/app/charm/id646105099)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Quality Valve free?

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

### Is Charm free?

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

### Do Quality Valve or Charm have ads?

Neither Quality Valve nor Charm shows ads.

### Which is updated more often, Quality Valve or Charm?

Quality Valve ships an update every 8 months, and Charm every 4 weeks. Most recently, Quality Valve was updated on October 29, 2026 and Charm on October 29, 2026.

---

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