# Quick Calc Hydraulics vs Corva Legacy

The clearest difference is ads: Quick Calc Hydraulics at none against Corva Legacy's shown. Quick Calc Hydraulics also leads on monetization model (free vs ad-supported) and iOS requirement (9.3 vs 14.0). Corva Legacy's advantage is update cadence (every 2 months vs every 7 months). On price, rating, ratings volume and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Quick Calc Hydraulics against 5.0 for Corva Legacy. Both are backed by a comparable volume of ratings — 9 and 15 respectively.

Quick Calc Hydraulics ships an update every 7 months, Corva Legacy every 2 months. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Quick Calc Hydraulics | Corva Legacy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (9 ratings)](https://appshunter.io/ios/app/quick-calc-hydraulics/id404002035/reviews) | **[5.0 (15 ratings)](https://appshunter.io/ios/app/corva-legacy/id1194184159/reviews)** |
| Number of ratings | 9 | **15** |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 88 MB | 37 MB |
| Requires iOS | **9.3** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Schlumberger Technology Corporation](https://appshunter.io/developer/380098290) | [Corva](https://appshunter.io/developer/1194184158) |

## What reviewers say

### Quick Calc Hydraulics

[App page](https://appshunter.io/ios/app/quick-calc-hydraulics/id404002035)

This app calculates hydraulic horsepower, jet velocity, and impact forces at a jet nozzle orifice for earth-boring operations. Users input fluid density, flow rates, TFA, and bit diameter to get results for conventional drilling fluids. Calculated data can be shared with contacts.

**Highlights:** Hydraulic horsepower calculation, Jet velocity calculation, Impact force calculation, Input fluid density, flow rates, TFA, and bit diameter, Share results with contacts

**Features:** macOS Compatibility

**In-app purchases:** none


### Corva Legacy

[App page](https://appshunter.io/ios/app/corva-legacy/id1194184159)

This platform provides real-time data and analytics for the oil and gas industry. It enables customers and vendors to build custom applications and dashboards for enhanced drilling and completion operations.

**Highlights:** Real-time data and analytics, App and dashboard development, Drilling operations enhancement, Completion operations improvement, Customer and vendor collaboration

**In-app purchases:** none


## Frequently asked questions

### Is Quick Calc Hydraulics free?

Quick Calc Hydraulics is free to download, with no in-app purchases.

### Is Corva Legacy free?

Corva Legacy is free to download, with no in-app purchases.

### Which has better reviews, Quick Calc Hydraulics or Corva Legacy?

Corva Legacy is rated higher. Quick Calc Hydraulics averages 4.9 out of 5 from 9 ratings, while Corva Legacy averages 5.0 from 15 ratings.

### Do Quick Calc Hydraulics or Corva Legacy have ads?

Corva Legacy shows ads; Quick Calc Hydraulics does not.

### Which is updated more often, Quick Calc Hydraulics or Corva Legacy?

Quick Calc Hydraulics ships an update every 7 months, and Corva Legacy every 2 months. Most recently, Quick Calc Hydraulics was updated on October 23, 2026 and Corva Legacy on October 4, 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.*