# Slope Level RX vs Protractor Measuring Angle

The clearest difference is price: Protractor Measuring Angle at Free against Slope Level RX's $1.99. Protractor Measuring Angle also leads on in-app purchases (none vs 1) and update cadence (every 2 days vs every 3 weeks). On ads, device support and iOS requirement there is nothing between them.

Protractor Measuring Angle is free to download; Slope Level RX costs $1.99 up front. Slope Level RX sells 1 one-off in-app purchase. Protractor Measuring Angle asks for nothing beyond the download.

Slope Level RX ships an update every 3 weeks, Protractor Measuring Angle every 2 days. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Slope Level RX | Protractor Measuring Angle |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 2 MB | 16 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [浩东 许](https://appshunter.io/developer/1834069800) | [MSR TECH LLP](https://appshunter.io/developer/1761560109) |

## What reviewers say

### 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 |


### Protractor Measuring Angle

[App page](https://appshunter.io/ios/app/protractor-measuring-angle/id6785106013)

**In-app purchases:** none


## Frequently asked questions

### Is Slope Level RX free?

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

### Is Protractor Measuring Angle free?

Protractor Measuring Angle is free to download, with no in-app purchases.

### Do Slope Level RX or Protractor Measuring Angle have ads?

Neither Slope Level RX nor Protractor Measuring Angle shows ads.

### Which is updated more often, Slope Level RX or Protractor Measuring Angle?

Slope Level RX ships an update every 3 weeks, and Protractor Measuring Angle every 2 days. Most recently, Slope Level RX was updated on September 9, 2026 and Protractor Measuring Angle on September 19, 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.*