# QR Code Check vs Slope Level RX

The clearest difference is price: QR Code Check at Free against Slope Level RX's $1.99. QR Code Check also leads on update cadence (every 6 days vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

QR Code Check is free to download; Slope Level RX costs $1.99 up front. QR Code Check sells 2 in-app purchases, starting at $2.99 per month and Slope Level RX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

QR Code Check ships an update every 6 days, Slope Level RX every 3 weeks. The most recent releases landed on October 6, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | QR Code Check | Slope Level RX |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Size | 6 MB | 2 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [INNOVATIVE ONLINE INDUSTRIES](https://appshunter.io/developer/1844151900) | [浩东 许](https://appshunter.io/developer/1834069800) |

## What reviewers say

### QR Code Check

[App page](https://appshunter.io/ios/app/qr-code-check/id6759892910)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Annual | $9.99 | per year |


### Slope Level RX

[App page](https://appshunter.io/ios/app/slope-level-rx/id6772923336)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $2.99 | one-time |


## Frequently asked questions

### Is QR Code Check free?

QR Code Check is free to download, with in-app purchases available.

### Is Slope Level RX free?

Slope Level RX costs $1.99, and also offers in-app purchases.

### Do QR Code Check or Slope Level RX have ads?

Neither QR Code Check nor Slope Level RX shows ads.

### Which is updated more often, QR Code Check or Slope Level RX?

QR Code Check ships an update every 6 days, and Slope Level RX every 3 weeks. Most recently, QR Code Check was updated on October 6, 2026 and Slope Level RX on September 26, 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.*