# Smart ADF vs WelderCalc

The clearest difference is in-app purchases: Smart ADF at none against WelderCalc's 4. Smart ADF also leads on iOS requirement (12.0 vs 16.0). WelderCalc's advantage is update cadence (every 4 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. WelderCalc sells 4 in-app purchases, starting at $1.99 per month. Smart ADF asks for nothing beyond the download.

Smart ADF ships an update every 6 weeks, WelderCalc every 4 days. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Smart ADF | WelderCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 38 MB | 1 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [TECMEN ELECTRONICS CO.,LTD](https://appshunter.io/developer/1773240509) | [Double Vision USA LLC](https://appshunter.io/developer/1894678139) |

## What reviewers say

### Smart ADF

[App page](https://appshunter.io/ios/app/smart-adf/id6736734587)

**Features:** macOS Compatibility

**In-app purchases:** none


### WelderCalc

[App page](https://appshunter.io/ios/app/weldercalc-welding-calculator/id6763315264)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Yearly | $9.99 | per year |
| Pro Unlock | $24.99 | one-time |
| Fab Shop Bundle | $139.99 | one-time |


## Frequently asked questions

### Is Smart ADF free?

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

### Is WelderCalc free?

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

### Do Smart ADF or WelderCalc have ads?

Neither Smart ADF nor WelderCalc shows ads.

### Which is updated more often, Smart ADF or WelderCalc?

Smart ADF ships an update every 6 weeks, and WelderCalc every 4 days. Most recently, Smart ADF was updated on October 20, 2026 and WelderCalc on October 25, 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.*