# Hole Volumes vs DDToolsPro

The clearest difference is price: Hole Volumes at Free against DDToolsPro's $9.99. Hole Volumes also leads on in-app purchases (none vs 2). DDToolsPro's advantage is update cadence (every 2 months vs every 5 months) and chart position (#167 vs unranked). On ads, device support and iOS requirement there is nothing between them.

Hole Volumes is free to download; DDToolsPro costs $9.99 up front. DDToolsPro sells 2 in-app purchases, starting at $12.99 per month. Hole Volumes asks for nothing beyond the download.

Hole Volumes ships an update every 5 months, DDToolsPro every 2 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Hole Volumes | DDToolsPro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/hole-volumes/id645763976/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Best chart rank | — | **#167** |
| Size | 4 MB | 8 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ash Point Ltd.](https://appshunter.io/developer/567630274) | [Michael Blake](https://appshunter.io/developer/1443250004) |

## 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


### DDToolsPro

[App page](https://appshunter.io/ios/app/ddtoolspro/id6755078356)

**Currently charting:** #167 Top Paid · Utilities (US App Store)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DD Tools Pro Unlock - Monthly | $12.99 | per month |
| DD Tools Pro Unlock - Annual | $129.99 | per year |


## Frequently asked questions

### Is Hole Volumes free?

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

### Is DDToolsPro free?

DDToolsPro costs $9.99, and also offers in-app purchases.

### Do Hole Volumes or DDToolsPro have ads?

Neither Hole Volumes nor DDToolsPro shows ads.

### Which is updated more often, Hole Volumes or DDToolsPro?

Hole Volumes ships an update every 5 months, and DDToolsPro every 2 months. Most recently, Hole Volumes was updated on November 1, 2026 and DDToolsPro on October 30, 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.*