# Hydraulic Calculator Engineer vs Mathgra Math Grapher

The clearest difference is ads: Hydraulic Calculator Engineer at none against Mathgra Math Grapher's shown. Hydraulic Calculator Engineer also leads on iOS requirement (15.0 vs 18.0). Mathgra Math Grapher's advantage is update cadence (daily vs every 22 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Hydraulic Calculator Engineer ships an update every 22 months, Mathgra Math Grapher daily. The most recent releases landed on September 28, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Hydraulic Calculator Engineer | Mathgra Math Grapher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (9 ratings)](https://appshunter.io/ios/app/hydraulic-calculator-engineer/id1664790770/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 22 months | **Daily** |
| Monetization | Free | — |
| Size | 21 MB | 8 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arsosa Network Inc.](https://appshunter.io/developer/1209042440) | [Hideyuki Inada](https://appshunter.io/developer/926079378) |

## What reviewers say

### Hydraulic Calculator Engineer

[App page](https://appshunter.io/ios/app/hydraulic-calculator-engineer/id1664790770)

This app offers a suite of hydraulic calculations for technicians and engineers. It simplifies complex hydraulics by automatically computing results based on user-entered values, eliminating the need for manual formula application.

**Highlights:** Cylinder Calculation, Power Calculation, Pressure Difference, Piston Diameter, Speed Calculation, Lifting Time, Volume Flow

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

**In-app purchases:** none


### Mathgra Math Grapher

[App page](https://appshunter.io/ios/app/mathgra-math-grapher/id6746895070)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hydraulic Calculator Engineer free?

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

### Is Mathgra Math Grapher free?

Mathgra Math Grapher is free to download, with no in-app purchases.

### Do Hydraulic Calculator Engineer or Mathgra Math Grapher have ads?

Mathgra Math Grapher shows ads; Hydraulic Calculator Engineer does not.

### Which is updated more often, Hydraulic Calculator Engineer or Mathgra Math Grapher?

Hydraulic Calculator Engineer ships an update every 22 months, and Mathgra Math Grapher daily. Most recently, Hydraulic Calculator Engineer was updated on September 28, 2026 and Mathgra Math Grapher on June 3, 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.*