# Hole Volumes vs Combine Fluids

The clearest difference is review sentiment: Combine Fluids at 67% against Hole Volumes's 0%. Combine Fluids also leads on update cadence (monthly vs every 5 months) and iOS requirement (10.0 vs 17.0). Hole Volumes's advantage is price (Free vs $0.99) and rating (4.0 vs 3.7). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Hole Volumes is free to download; Combine Fluids costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hole Volumes holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 0% of Hole Volumes's written reviews are positive against 67% of Combine Fluids's, so the app with the better star average is not the one people write more warmly about.

Hole Volumes ships an update every 5 months, Combine Fluids monthly. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Hole Volumes | Combine Fluids |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/hole-volumes/id645763976/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/combine-fluids/id1458907903/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 4 MB | 85 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ash Point Ltd.](https://appshunter.io/developer/567630274) | [GoodStamp](https://appshunter.io/developer/717537129) |

## What reviewers say

### Hole Volumes

[App page](https://appshunter.io/ios/app/hole-volumes/id645763976)

This app calculates various oilfield volumes, including hole, annular, tubing, and displacement. Users input depth, casing, and tubing sizes to get quick results. It supports both metric and standard units and allows for custom pipe sizes.

**Highlights:** Calculate hole volumes, Calculate annular volumes, Calculate tubing volumes, Calculate displacement volumes, Supports metric and standard units, Custom pipe size entry

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Hole Volumes free?

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

### Is Combine Fluids free?

Combine Fluids costs $0.99, with no in-app purchases.

### Which has better reviews, Hole Volumes or Combine Fluids?

Hole Volumes is rated higher. Hole Volumes averages 4.0 out of 5 from 3 ratings, while Combine Fluids averages 3.7 from 3 ratings.

### Do Hole Volumes or Combine Fluids have ads?

Neither Hole Volumes nor Combine Fluids shows ads.

### Which is updated more often, Hole Volumes or Combine Fluids?

Hole Volumes ships an update every 5 months, and Combine Fluids monthly. Most recently, Hole Volumes was updated on November 1, 2026 and Combine Fluids on November 6, 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.*