# Mud fluid vs Workstrings

The clearest difference is in-app purchases: Workstrings at none against Mud fluid's 3. Workstrings also leads on review sentiment (100% vs 77%) and update cadence (every 8 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Mud fluid sells 3 one-off in-app purchases. Workstrings asks for nothing beyond the download.

Mud fluid ships an update every 2 weeks, Workstrings every 8 days. The most recent releases landed on October 1, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Mud fluid | Workstrings |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (14 ratings)](https://appshunter.io/ios/app/workstrings/id6740924535/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | 76.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 135 MB |
| Requires iOS | 16.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitry Pavlov](https://appshunter.io/developer/1582369829) | [SESI Holdings, Inc.](https://appshunter.io/developer/1777501957) |

## What reviewers say

### Mud fluid

[App page](https://appshunter.io/ios/app/mud-fluid/id1582369827)

This app assists mud engineers with rapid calculations for wellbore flushing, including time and volume. It supports drilling intervals like surface casing and production casing, and can also compute solution weight and dilution. Metric units are currently available, with imperial units planned for a future update.

**Highlights:** Wellbore flushing time and volume calculation, Supports drilling intervals, Solution weight calculation, Dilution calculation, Metric units support

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tips | $0.99 | one-time |
| For cookies | $0.99 | one-time |
| For coffee | $4.99 | one-time |


### Workstrings

[App page](https://appshunter.io/ios/app/workstrings/id6740924535)

Access and share detailed product specifications for a wide range of tubular goods and specialized joints. Easily search, view, and download spec sheets for items like drill pipe, landing string, and drill collars.

**Highlights:** Search product specifications, View detailed spec sheets, Download specification documents, Share product information, Browse tubular goods, Access Worktech Joints specs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mud fluid free?

Mud fluid is free to download, with in-app purchases available.

### Is Workstrings free?

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

### Do Mud fluid or Workstrings have ads?

Neither Mud fluid nor Workstrings shows ads.

### Which is updated more often, Mud fluid or Workstrings?

Mud fluid ships an update every 2 weeks, and Workstrings every 8 days. Most recently, Mud fluid was updated on October 1, 2026 and Workstrings on June 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.*