# Mud fluid vs Скидос

The clearest difference is in-app purchases: Скидос at none against Mud fluid's 3. On price, update cadence, ads and device support there is nothing between them.

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

Mud fluid ships an update every 2 weeks, Скидос every 10 days. The most recent releases landed on October 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mud fluid | Скидос |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 35 MB |
| Requires iOS | 16.1 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Dmitry Pavlov](https://appshunter.io/developer/1582369829) | [Anton Naidenov](https://appshunter.io/developer/1892830787) |

## 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 |


### Скидос

[App page](https://appshunter.io/ios/app/id6775503298)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mud fluid free?

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

### Is Скидос free?

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

### Do Mud fluid or Скидос have ads?

Neither Mud fluid nor Скидос shows ads.

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

Mud fluid ships an update every 2 weeks, and Скидос every 10 days. Most recently, Mud fluid was updated on October 1, 2026 and Скидос on October 31, 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.*