# Stepper Motor Calculator vs QRDrop

The clearest difference is price: QRDrop at Free against Stepper Motor Calculator's $2.99. QRDrop also leads on update cadence (every 6 days vs every 32 months). Stepper Motor Calculator's advantage is iOS requirement (13 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

QRDrop is free to download; Stepper Motor Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stepper Motor Calculator ships an update every 32 months, QRDrop every 6 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Stepper Motor Calculator | QRDrop |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 6 days** |
| Size | 1 MB | 32 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [铫 刘](https://appshunter.io/developer/1807203451) |

## What reviewers say

### Stepper Motor Calculator

[App page](https://appshunter.io/ios/app/stepper-motor-calculator/id1367815636)

**Features:** macOS Compatibility

**In-app purchases:** none


### QRDrop

[App page](https://appshunter.io/ios/app/qrdrop-qr-code-file-transfer/id6794542714)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stepper Motor Calculator free?

Stepper Motor Calculator costs $2.99, with no in-app purchases.

### Is QRDrop free?

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

### Do Stepper Motor Calculator or QRDrop have ads?

Neither Stepper Motor Calculator nor QRDrop shows ads.

### Which is updated more often, Stepper Motor Calculator or QRDrop?

Stepper Motor Calculator ships an update every 32 months, and QRDrop every 6 days. Most recently, Stepper Motor Calculator was updated on October 29, 2026 and QRDrop on October 31, 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.*