# Compressor HP vs Cementing Engineer

The clearest difference is update cadence: Cementing Engineer at fortnightly against Compressor HP's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Compressor HP sells 3 one-off in-app purchases and Cementing Engineer sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Compressor HP ships an update every 4 months, Cementing Engineer fortnightly. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Compressor HP | Cementing Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cementing-engineer/id6779455442/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Subscription |
| Size | 3 MB | 18 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### Compressor HP

[App page](https://appshunter.io/ios/app/compressor-hp/id1539320947)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock capacitor size | $0.99 | one-time |
| Unlock compressors type | $2.99 | one-time |
| Unlock all refrigerants | $2.99 | one-time |


### Cementing Engineer

[App page](https://appshunter.io/ios/app/cementing-engineer/id6779455442)

This app is a field calculator for oilfield cementing operations. It allows users to input wellbore geometry and slurry details to get live, updated calculations for volumes, pressures, and pump schedules. The app also features a live well schematic and a tally book for saving and recalling job details.

**Highlights:** Field calculator for oilfield cementing, Live, updating calculations for volumes and pressures, Wellbore geometry and slurry stack input, Derived results with detailed math, Live well schematic, Tally Book for saving and recalling jobs, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is Compressor HP free?

Compressor HP is free to download, with in-app purchases available.

### Is Cementing Engineer free?

Cementing Engineer is free to download, with in-app purchases available.

### Do Compressor HP or Cementing Engineer have ads?

Neither Compressor HP nor Cementing Engineer shows ads.

### Which is updated more often, Compressor HP or Cementing Engineer?

Compressor HP ships an update every 4 months, and Cementing Engineer fortnightly. Most recently, Compressor HP was updated on October 6, 2026 and Cementing Engineer on October 5, 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.*