# Combine Fluids vs Kyanite Pro

The clearest difference is price: Kyanite Pro at Free against Combine Fluids's $0.99. Kyanite Pro also leads on rating (5.0 vs 3.7) and update cadence (every 5 days vs monthly). Combine Fluids's advantage is in-app purchases (none vs 2) and ratings volume (3 vs 1). On ads and device support there is nothing between them.

Kyanite Pro is free to download; Combine Fluids costs $0.99 up front. Kyanite Pro sells 2 in-app purchases, starting at $3.99 per month. Combine Fluids asks for nothing beyond the download.

Kyanite Pro holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Combine Fluids ships an update monthly, Kyanite Pro every 5 days. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Combine Fluids | Kyanite Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/combine-fluids/id1458907903/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kyanite-pro/id6802395850/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Paid | **Freemium** |
| Size | 85 MB | 41 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

### Combine Fluids

[App page](https://appshunter.io/ios/app/combine-fluids/id1458907903)

This utility app helps oil and gas professionals quickly calculate fluid volume combinations. It allows users to input various fluid types and density requirements, saving different mix possibilities for specific wells.

**Highlights:** Combine up to 10 fluid types, Save fluid mix possibilities per well, Calculate volume combinations, Input mud density requirements, Supports volume limitations or not

**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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kyanite Pro Monthly | $3.99 | per month |
| Kyanite Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Combine Fluids free?

Combine Fluids 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, Combine Fluids or Kyanite Pro?

Kyanite Pro is rated higher. Combine Fluids averages 3.7 out of 5 from 3 ratings, while Kyanite Pro averages 5.0 from 1 ratings.

### Do Combine Fluids or Kyanite Pro have ads?

Neither Combine Fluids nor Kyanite Pro shows ads.

### Which is updated more often, Combine Fluids or Kyanite Pro?

Combine Fluids ships an update monthly, and Kyanite Pro every 5 days. Most recently, Combine Fluids was updated on October 7, 2026 and Kyanite Pro on October 16, 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.*