# Экогид vs Mud fluid

The clearest difference is price: Mud fluid at Free against Экогид's $3.99. Экогид's advantage is in-app purchases (none vs 3) and review sentiment (100% vs 77%). On update cadence, ads, device support and iOS requirement there is nothing between them.

Mud fluid is free to download; Экогид costs $3.99 up front. Mud fluid sells 3 one-off in-app purchases. Экогид asks for nothing beyond the download.

Экогид ships an update every 3 weeks, Mud fluid every 2 weeks. The most recent releases landed on October 29, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Экогид | Mud fluid |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/id1360622529/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 76.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 114 MB | 9 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ecosystema](https://appshunter.io/developer/432942568) | [Dmitry Pavlov](https://appshunter.io/developer/1582369829) |

## What reviewers say

### Экогид

[App page](https://appshunter.io/ios/app/id1360622529)

Identify Russian mushrooms with this comprehensive field guide and encyclopedia. Covers 329 species with detailed descriptions, photos, and ecological information. Works offline, making it perfect for nature excursions.

**Highlights:** Identify mushrooms by morphological and ecological traits, Covers 329 species of Russian fungi, Detailed descriptions, photos, and drawings, Offline functionality for use in nature, Information on edible, poisonous, and rare species, Searchable atlas with common and Latin names

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Экогид free?

Экогид costs $3.99, with no in-app purchases.

### Is Mud fluid free?

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

### Do Экогид or Mud fluid have ads?

Neither Экогид nor Mud fluid shows ads.

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

Экогид ships an update every 3 weeks, and Mud fluid every 2 weeks. Most recently, Экогид was updated on October 29, 2026 and Mud fluid on October 1, 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.*