# Slope Calculator vs Dumpy Pro.

The clearest difference is price: Slope Calculator at Free against Dumpy Pro.'s $2.99. Slope Calculator also leads on iOS requirement (13.0 vs 17.0). Dumpy Pro.'s advantage is in-app purchases (none vs 1) and update cadence (daily vs every 14 months). On ads and device support there is nothing between them.

Slope Calculator is free to download; Dumpy Pro. costs $2.99 up front. Slope Calculator sells 1 one-off in-app purchase. Dumpy Pro. asks for nothing beyond the download.

Slope Calculator ships an update every 14 months, Dumpy Pro. daily. The most recent releases landed on October 19, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Slope Calculator | Dumpy Pro. |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| 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 | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 9 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [JAYDON CONNOR SMITH](https://appshunter.io/developer/1864717747) |

## 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 |


### Dumpy Pro.

[App page](https://appshunter.io/ios/app/dumpy-pro/id6760949462)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Slope Calculator free?

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

### Is Dumpy Pro. free?

Dumpy Pro. costs $2.99, with no in-app purchases.

### Do Slope Calculator or Dumpy Pro. have ads?

Neither Slope Calculator nor Dumpy Pro. shows ads.

### Which is updated more often, Slope Calculator or Dumpy Pro.?

Slope Calculator ships an update every 14 months, and Dumpy Pro. daily. Most recently, Slope Calculator was updated on October 19, 2026 and Dumpy Pro. on October 1, 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.*