# Mud Engineer vs Corva

The clearest difference is price: Corva at Free against Mud Engineer's $2.99. Corva also leads on rating (5.0 vs 1.0) and update cadence (every 10 days vs every 34 months). Mud Engineer's advantage is chart position (#72 vs unranked) and iOS requirement (13.0 vs 15.1). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Corva is free to download; Mud Engineer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Corva holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Mud Engineer ships an update every 34 months, Corva every 10 days. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Mud Engineer | Corva |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/mud-engineer/id992941305/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/corva/id6736755978/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 10 days** |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#72** | — |
| Size | 31 MB | 178 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [bader alshammari](https://appshunter.io/developer/858126240) | [Corva](https://appshunter.io/developer/1194184158) |

## What reviewers say

### Mud Engineer

[App page](https://appshunter.io/ios/app/mud-engineer/id992941305)

**Currently charting:** #72 Top Paid · Business (US App Store)

This app provides essential drilling calculations for mud engineers. It helps determine final mud weight, volume adjustments, and the number of sacks needed for various drilling scenarios.

**Highlights:** Final Mud Weight calculation, Volume calculations, Sack calculations, lb/bbl calculation, Weight Up calculation

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

**In-app purchases:** none


### Corva

[App page](https://appshunter.io/ios/app/corva/id6736755978)

This app provides real-time drilling and completions optimization for the oil and gas industry. It offers dynamic visualizations and data-driven insights to enhance operational efficiency and well performance.

**Highlights:** Digital Drilling visualization, Digital Completions operations view, Real-time drilling dynamics tracking, Treatment Plot for wellhead pressure and fluid volumes, AI-powered tools for operational excellence

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

**In-app purchases:** none


## Frequently asked questions

### Is Mud Engineer free?

Mud Engineer costs $2.99, with no in-app purchases.

### Is Corva free?

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

### Which has better reviews, Mud Engineer or Corva?

Corva is rated higher. Mud Engineer averages 1.0 out of 5 from 1 ratings, while Corva averages 5.0 from 2 ratings.

### Do Mud Engineer or Corva have ads?

Neither Mud Engineer nor Corva shows ads.

### Which is updated more often, Mud Engineer or Corva?

Mud Engineer ships an update every 34 months, and Corva every 10 days. Most recently, Mud Engineer was updated on September 17, 2026 and Corva on September 10, 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.*