# MAI TECH vs WeldCalc Pro

The clearest difference is in-app purchases: MAI TECH at none against WeldCalc Pro's 3. MAI TECH also leads on device support (3 vs 1) and iOS requirement (12.3 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. WeldCalc Pro sells 3 in-app purchases, starting at $1.99 per 7 days. MAI TECH asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MAI TECH | WeldCalc Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 152 MB | 21 MB |
| Requires iOS | **12.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Shantou Institute of Ultrasonic Inst. Co., Ltd.](https://appshunter.io/developer/406261738) | [Ersel Tarhan](https://appshunter.io/developer/1093545232) |

## What reviewers say

### MAI TECH

[App page](https://appshunter.io/ios/app/mai-tech/id6444035864)

**Features:** macOS Compatibility

**In-app purchases:** none


### WeldCalc Pro

[App page](https://appshunter.io/ios/app/weldcalc-pro-welding-calc/id6759536437)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Annual Premium | $19.99 | per year |
| WeldCalc Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is MAI TECH free?

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

### Is WeldCalc Pro free?

WeldCalc Pro is free to download, with in-app purchases available.

### Do MAI TECH or WeldCalc Pro have ads?

Neither MAI TECH nor WeldCalc Pro shows ads.

### Which is updated more often, MAI TECH or WeldCalc Pro?

MAI TECH ships an update every 3 weeks, and WeldCalc Pro every 3 weeks. Most recently, MAI TECH was updated on November 7, 2026 and WeldCalc Pro on November 5, 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.*