# Roscoe Moss Calculator App vs Cementing Engineer

The clearest difference is in-app purchases: Roscoe Moss Calculator App at none against Cementing Engineer's 2. Cementing Engineer's advantage is update cadence (fortnightly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cementing Engineer sells 2 in-app purchases, starting at $9.99 per month. Roscoe Moss Calculator App asks for nothing beyond the download.

Roscoe Moss Calculator App ships an update every 4 months, Cementing Engineer fortnightly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Roscoe Moss Calculator App | Cementing Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cementing-engineer/id6779455442/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Subscription |
| Size | 21 MB | 18 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roscoe Moss Manufacturing Company](https://appshunter.io/developer/1138080217) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### Roscoe Moss Calculator App

[App page](https://appshunter.io/ios/app/roscoe-moss-calculator-app/id1644445889)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Roscoe Moss Calculator App free?

Roscoe Moss Calculator App is free to download, with no in-app purchases.

### Is Cementing Engineer free?

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

### Do Roscoe Moss Calculator App or Cementing Engineer have ads?

Neither Roscoe Moss Calculator App nor Cementing Engineer shows ads.

### Which is updated more often, Roscoe Moss Calculator App or Cementing Engineer?

Roscoe Moss Calculator App ships an update every 4 months, and Cementing Engineer fortnightly. Most recently, Roscoe Moss Calculator App was updated on October 27, 2026 and Cementing Engineer on October 24, 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.*