# Directional Survey Methods vs MUDSheet

The clearest difference is update cadence: MUDSheet at every 2 months against Directional Survey Methods's every 50 months. MUDSheet also leads on iOS requirement (9.0 vs 12.0). On price, ads, 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.

Directional Survey Methods ships an update every 50 months, MUDSheet every 2 months. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Directional Survey Methods | MUDSheet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mudsheet/id1510513381/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 7 MB | 18 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) |

## What reviewers say

### Directional Survey Methods

[App page](https://appshunter.io/ios/app/directional-survey-methods/id1130800392)

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

**In-app purchases:** none


### MUDSheet

[App page](https://appshunter.io/ios/app/mudsheet/id1510513381)

This app provides essential calculations and data for mud engineering. It distills critical information from various engineering resources into a convenient tool for mud and drilling engineers, offering quick access to equations and chemical formulas.

**Highlights:** Essential mud engineering calculations, Quick access to drilling equations, Chemical formulas and atomic table, Unit conversion and setup exchange, Input data validation, Multiple table references

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Directional Survey Methods free?

Directional Survey Methods is free to download, with no in-app purchases.

### Is MUDSheet free?

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

### Do Directional Survey Methods or MUDSheet have ads?

Neither Directional Survey Methods nor MUDSheet shows ads.

### Which is updated more often, Directional Survey Methods or MUDSheet?

Directional Survey Methods ships an update every 50 months, and MUDSheet every 2 months. Most recently, Directional Survey Methods was updated on September 15, 2026 and MUDSheet 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.*