# Q Calculator vs Mailinblack

The clearest difference is update cadence: Mailinblack at every 3 weeks against Q Calculator's every 14 months. Q Calculator's advantage is iOS requirement (15.1 vs 18.0). 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.

Q Calculator ships an update every 14 months, Mailinblack every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Q Calculator | Mailinblack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/q-calculator/id1323960132/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 30 MB | 99 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [ArtWhere s.a.](https://appshunter.io/developer/389537571) | [Mailinblack](https://appshunter.io/developer/1465120919) |

## What reviewers say

### Q Calculator

[App page](https://appshunter.io/ios/app/q-calculator/id1323960132)

This app provides optimal parameters for cutting, bending, welding, or machining specific steel types. Input basic steel information to receive precise machine setup guidance for high-quality results. It functions offline, ensuring accessibility in any location.

**Highlights:** Steel parameter calculation, Cutting, bending, welding guidance, Machining optimization, Offline functionality, Multi-language support, High-quality work output

**Features:** macOS Compatibility

**In-app purchases:** none


### Mailinblack

[App page](https://appshunter.io/ios/app/mailinblack/id6464315792)

**In-app purchases:** none


## Frequently asked questions

### Is Q Calculator free?

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

### Is Mailinblack free?

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

### Do Q Calculator or Mailinblack have ads?

Neither Q Calculator nor Mailinblack shows ads.

### Which is updated more often, Q Calculator or Mailinblack?

Q Calculator ships an update every 14 months, and Mailinblack every 3 weeks. Most recently, Q Calculator was updated on November 2, 2026 and Mailinblack on November 3, 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.*