# Graphs and Slopes vs Hydraulic ToolKit

The clearest difference is price: Hydraulic ToolKit at Free against Graphs and Slopes's $2.99. Hydraulic ToolKit also leads on update cadence (monthly vs every 11 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Hydraulic ToolKit is free to download; Graphs and Slopes costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Graphs and Slopes ships an update every 11 months, Hydraulic ToolKit monthly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Graphs and Slopes | Hydraulic ToolKit |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hydraulic-toolkit/id6468667309/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | — | Free |
| Size | 3 MB | 23 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gomathy Shankaran](https://appshunter.io/developer/503956143) | [Wade Trim Group, Inc.](https://appshunter.io/developer/1664648819) |

## What reviewers say

### Graphs and Slopes

[App page](https://appshunter.io/ios/app/graphs-and-slopes/id1555122436)

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

**In-app purchases:** none


### Hydraulic ToolKit

[App page](https://appshunter.io/ios/app/hydraulic-toolkit/id6468667309)

Perform essential hydraulic calculations for water infrastructure design on the go. This portable tool offers quick checks for engineers and students, covering common formulas for pipes, channels, and more.

**Highlights:** Perform 7 hydraulic formulas, Supports imperial and metric systems, Quick calculation checks, Portable tool for field use, Reference hydraulic coefficients

**In-app purchases:** none


## Frequently asked questions

### Is Graphs and Slopes free?

Graphs and Slopes costs $2.99, with no in-app purchases.

### Is Hydraulic ToolKit free?

Hydraulic ToolKit is free to download, with no in-app purchases.

### Do Graphs and Slopes or Hydraulic ToolKit have ads?

Neither Graphs and Slopes nor Hydraulic ToolKit shows ads.

### Which is updated more often, Graphs and Slopes or Hydraulic ToolKit?

Graphs and Slopes ships an update every 11 months, and Hydraulic ToolKit monthly. Most recently, Graphs and Slopes was updated on October 27, 2026 and Hydraulic ToolKit on October 24, 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.*