# Slope Calculator vs Flight parameters

The clearest difference is price: Slope Calculator at Free against Flight parameters's $2.99. Slope Calculator also leads on iOS requirement (13.0 vs 15.4). Flight parameters's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 14 months). On ads and device support there is nothing between them.

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

Slope Calculator ships an update every 14 months, Flight parameters every 3 weeks. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Slope Calculator | Flight parameters |
| --- | --- | --- |
| 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 | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 1 MB |
| Requires iOS | **13.0** | 15.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Konstantinos Ladiellis](https://appshunter.io/developer/1516103440) |

## 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 |


### Flight parameters

[App page](https://appshunter.io/ios/app/flight-parameters/id1623908949)

**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 Flight parameters free?

Flight parameters costs $2.99, with no in-app purchases.

### Do Slope Calculator or Flight parameters have ads?

Neither Slope Calculator nor Flight parameters shows ads.

### Which is updated more often, Slope Calculator or Flight parameters?

Slope Calculator ships an update every 14 months, and Flight parameters every 3 weeks. Most recently, Slope Calculator was updated on October 19, 2026 and Flight parameters on October 20, 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.*