# Chargemetrix vs RDWelder

The clearest difference is update cadence: Chargemetrix at every 5 days against RDWelder's every 6 weeks. RDWelder's advantage is iOS requirement (13 vs 15). On price, ads, in-app purchases and device support there is nothing between them.

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

Chargemetrix ships an update every 5 days, RDWelder every 6 weeks. The most recent releases landed on September 20, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Chargemetrix | RDWelder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Size | 24 MB | 133 MB |
| Requires iOS | 15 | **13** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Metrix Advanced Technologies](https://appshunter.io/developer/1666953245) | [深圳市睿达科技有限公司](https://appshunter.io/developer/1188607581) |

## What reviewers say

### Chargemetrix

[App page](https://appshunter.io/ios/app/chargemetrix/id6478617031)

**In-app purchases:** none


### RDWelder

[App page](https://appshunter.io/ios/app/rdwelder/id6738367984)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chargemetrix free?

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

### Is RDWelder free?

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

### Do Chargemetrix or RDWelder have ads?

Neither Chargemetrix nor RDWelder shows ads.

### Which is updated more often, Chargemetrix or RDWelder?

Chargemetrix ships an update every 5 days, and RDWelder every 6 weeks. Most recently, Chargemetrix was updated on September 20, 2026 and RDWelder on September 30, 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.*