# Signal Twelve vs Cementing Engineer

The clearest difference is update cadence: Signal Twelve at every 2 days against Cementing Engineer's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Signal Twelve sells 2 in-app purchases, starting at $4.99 per month 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.

Signal Twelve ships an update every 2 days, Cementing Engineer fortnightly. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Signal Twelve | 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | — | Subscription |
| Size | 29 MB | 18 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Signal Twelve LLC](https://appshunter.io/developer/6774658174) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### Signal Twelve

[App page](https://appshunter.io/ios/app/signal-twelve/id6774658172)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Signal Twelve Pro Monthly | $4.99 | per month |
| Signal Twelve Pro Annual | $39.99 | per year |


### 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 Signal Twelve free?

Signal Twelve 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 Signal Twelve or Cementing Engineer have ads?

Neither Signal Twelve nor Cementing Engineer shows ads.

### Which is updated more often, Signal Twelve or Cementing Engineer?

Signal Twelve ships an update every 2 days, and Cementing Engineer fortnightly. Most recently, Signal Twelve was updated on October 15, 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.*