# Dyna vs Volume in Pipe

The clearest difference is device support: Dyna at 3 against Volume in Pipe's 1. Dyna also leads on ratings volume (3 vs 1) and iOS requirement (8.0 vs 16.6). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Dyna against 5.0 for Volume in Pipe. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Dyna ships an update every 19 months, Volume in Pipe every 26 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Dyna | Volume in Pipe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/dyna-drill-power-sections/id1312988826/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/volume-in-pipe/id1582068096/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 19 months** | Every 26 months |
| Monetization | Free | Free |
| Size | 26 MB | 11 MB |
| Requires iOS | **8.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Schlumberger Technology Corporation](https://appshunter.io/developer/380098290) | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) |

## What reviewers say

### Dyna

[App page](https://appshunter.io/ios/app/dyna-drill-power-sections/id1312988826)

Explore and search detailed specifications for motor power sections, rotors, and stators. Find the ideal drilling solution by filtering based on tool size, lobes, stages, and revolutions per gallon. Save favorites and connect with experts.

**Highlights:** Browse power section spec sheets, Search by tool size, lobes, stages, and RPM, Identify optimal drilling solutions, Save commonly used spec sheets, Connect with regional experts

**Features:** macOS Compatibility

**In-app purchases:** none


### Volume in Pipe

[App page](https://appshunter.io/ios/app/volume-in-pipe/id1582068096)

Quickly estimate the gas volume within pipes, launchers, or vessels. Input operating conditions and pipe size for an approximate volume calculation. This tool is designed for rapid field estimates.

**Highlights:** Estimate gas volume, Input operating conditions, Select pipe size, Quick field estimates, Supports iPhone

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dyna free?

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

### Is Volume in Pipe free?

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

### Which has better reviews, Dyna or Volume in Pipe?

Dyna and Volume in Pipe are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do Dyna or Volume in Pipe have ads?

Neither Dyna nor Volume in Pipe shows ads.

### Which is updated more often, Dyna or Volume in Pipe?

Dyna ships an update every 19 months, and Volume in Pipe every 26 months. Most recently, Dyna was updated on October 6, 2026 and Volume in Pipe on October 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.*