# Mud Weight vs Kyanite Pro

The clearest difference is price: Kyanite Pro at Free against Mud Weight's $0.99. Kyanite Pro also leads on rating (5.0 vs 3.0) and update cadence (every 8 days vs every 4 months). Mud Weight's advantage is in-app purchases (none vs 7) and chart position (#159 vs unranked). On ratings volume, ads and device support there is nothing between them.

Kyanite Pro is free to download; Mud Weight costs $0.99 up front. Kyanite Pro sells 7 in-app purchases, starting at $9.99 per month. Mud Weight asks for nothing beyond the download.

Kyanite Pro holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Mud Weight ships an update every 4 months, Kyanite Pro every 8 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Mud Weight | Kyanite Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/mud-weight/id1456298201/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/kyanite-pro/id6802395850/reviews)** |
| Number of ratings | 2 | 2 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 8 days** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#159** | — |
| Size | 86 MB | 30 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GoodStamp](https://appshunter.io/developer/717537129) | [Mike Haynes](https://appshunter.io/developer/6802395852) |

## What reviewers say

### Mud Weight

[App page](https://appshunter.io/ios/app/mud-weight/id1456298201)

**Currently charting:** #159 Top Paid · Utilities (US App Store)

This utility app assists oil and gas professionals with quick calculations for drilling fluid weight. It allows users to adjust parameters like specific gravity and sack weight, save preferences for different wells, and calculate material needs.

**Highlights:** Adjust specific gravity, Calculate sack weight, Manage pallet sizes, Save mud and material preferences, Create multiple wells, Calculate material amounts

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

**In-app purchases:** none


### Kyanite Pro

[App page](https://appshunter.io/ios/app/kyanite-pro/id6802395850)

This app offers a suite of offline drilling calculators and reference tools for oil and gas professionals. It includes features for mud engineers, cementers, and directional drillers, with options to share data with crews. A free tier provides basic tools, while a subscription unlocks advanced calculators and job sheets.

**Highlights:** Offline drilling calculators, Mud, cement, and directional drilling tools, Field notes and reference charts, Crew data sharing, Kill sheet and cement job sheet, Chemical inventory management

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kyanite Pro Monthly | $9.99 | per month |
| Kyanite Ultra Monthly | $20.00 | per month |
| Kyanite Pro Yearly | $50.00 | per year |
| Kyanite Ultra Yearly | $119.99 | per year |
| Starter Pack | $2.99 | one-time |
| Value Pack | $4.99 | one-time |
| Professional Pack | $9.99 | one-time |


## Frequently asked questions

### Is Mud Weight free?

Mud Weight costs $0.99, with no in-app purchases.

### Is Kyanite Pro free?

Kyanite Pro is free to download, with in-app purchases available.

### Which has better reviews, Mud Weight or Kyanite Pro?

Kyanite Pro is rated higher. Mud Weight averages 3.0 out of 5 from 2 ratings, while Kyanite Pro averages 5.0 from 2 ratings.

### Do Mud Weight or Kyanite Pro have ads?

Neither Mud Weight nor Kyanite Pro shows ads.

### Which is updated more often, Mud Weight or Kyanite Pro?

Mud Weight ships an update every 4 months, and Kyanite Pro every 8 days. Most recently, Mud Weight was updated on October 24, 2026 and Kyanite Pro on October 25, 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.*