# Slope Calculator vs Pipe Math Pro

The clearest difference is price: Slope Calculator at Free against Pipe Math Pro's $9.99. Slope Calculator also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.6). Pipe Math Pro's advantage is in-app purchases (none vs 1) and chart position (#191 vs unranked). On update cadence and ads there is nothing between them.

Slope Calculator is free to download; Pipe Math Pro costs $9.99 up front. Slope Calculator sells 1 one-off in-app purchase. Pipe Math Pro asks for nothing beyond the download.

Slope Calculator ships an update every 14 months, Pipe Math Pro every 10 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Slope Calculator | Pipe Math Pro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.3 (104 ratings)](https://appshunter.io/ios/app/slope-calculator-calc/id1561129699/reviews)** | — |
| Number of ratings | **104** | — |
| Positive reviews | 58.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 10 months** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#191** |
| Size | 5 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Antonio Vitella](https://appshunter.io/developer/1797587730) |

## What reviewers say

### Slope Calculator

[App page](https://appshunter.io/ios/app/slope-calculator-calc/id1561129699)

Calculate slope in angle, percentage, or ratio by inputting two sides of a right triangle. This intuitive and easy-to-use application provides the remaining necessary values.

**Highlights:** Calculate slope as angle, Calculate slope as percentage, Calculate slope as ratio, Input two sides of a right triangle, Calculate remaining triangle values, Intuitive and easy to use

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### Pipe Math Pro

[App page](https://appshunter.io/ios/app/pipe-math-pro/id6742253582)

**Currently charting:** #191 Top Paid · Utilities (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Slope Calculator free?

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

### Is Pipe Math Pro free?

Pipe Math Pro costs $9.99, with no in-app purchases.

### Do Slope Calculator or Pipe Math Pro have ads?

Neither Slope Calculator nor Pipe Math Pro shows ads.

### Which is updated more often, Slope Calculator or Pipe Math Pro?

Slope Calculator ships an update every 14 months, and Pipe Math Pro every 10 months. Most recently, Slope Calculator was updated on October 23, 2026 and Pipe Math Pro on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*