# Slope Calculation Tool vs Gravity Ballistics

The clearest difference is price: Slope Calculation Tool at Free against Gravity Ballistics's $9.99. Slope Calculation Tool also leads on rating (4.3 vs 3.7) and update cadence (every 3 weeks vs every 21 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Slope Calculation Tool is free to download; Gravity Ballistics costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Slope Calculation Tool holds the better App Store score, 4.3 against 3.7. That said, the two scores are not equally well evidenced: Slope Calculation Tool has 84 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 71% of Slope Calculation Tool's written reviews are positive against 50% of Gravity Ballistics's.

Slope Calculation Tool ships an update every 3 weeks, Gravity Ballistics every 21 months. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Slope Calculation Tool | Gravity Ballistics |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.3 (84 ratings)](https://appshunter.io/ios/app/slope-calculation-tool/id1442177142/reviews)** | [3.7 (13 ratings)](https://appshunter.io/ios/app/gravity-ballistics/id6471524403/reviews) |
| Number of ratings | **84** | 13 |
| Positive reviews | **71.4% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 21 months |
| Monetization | **Free** | Paid |
| Size | 12 MB | 28 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Riyad Habash](https://appshunter.io/developer/1073719756) | [Sniper's Hide LLC](https://appshunter.io/developer/1562177599) |

## What reviewers say

### Slope Calculation Tool

[App page](https://appshunter.io/ios/app/slope-calculation-tool/id1442177142)

Calculate all aspects of a ramp's dimensions, including slope, run, length, and rise. It can also measure the slope of existing surfaces using your device's sensors. Supports various input combinations for flexible calculations.

**Highlights:** Calculate slope, run, length, and rise, Supports multiple input combinations, Measure existing surface slopes, Uses device sensors for measurement, Calculates slope as percentage, ratio, and angle

**Features:** Vision Pro support

**In-app purchases:** none


### Gravity Ballistics

[App page](https://appshunter.io/ios/app/gravity-ballistics/id6471524403)

Calculate precise scope adjustments for sniper rifles using real shooting data. Input your measured bullet drop, and the app provides accurate corrections for various distances, simplifying the process without requiring extensive external information.

**Highlights:** Real shooting data input, Precise scope adjustments, Bullet drop calculation, Simplified process, No extra data inputs needed

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

**In-app purchases:** none


## Frequently asked questions

### Is Slope Calculation Tool free?

Slope Calculation Tool is free to download, with no in-app purchases.

### Is Gravity Ballistics free?

Gravity Ballistics costs $9.99, with no in-app purchases.

### Which has better reviews, Slope Calculation Tool or Gravity Ballistics?

Slope Calculation Tool is rated higher. Slope Calculation Tool averages 4.3 out of 5 from 84 ratings, while Gravity Ballistics averages 3.7 from 13 ratings.

### Do Slope Calculation Tool or Gravity Ballistics have ads?

Neither Slope Calculation Tool nor Gravity Ballistics shows ads.

### Which is updated more often, Slope Calculation Tool or Gravity Ballistics?

Slope Calculation Tool ships an update every 3 weeks, and Gravity Ballistics every 21 months. Most recently, Slope Calculation Tool was updated on September 12, 2026 and Gravity Ballistics on September 22, 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.*