# Thremark vs Cementing Engineer

The clearest difference is monetization model: Thremark at freemium against Cementing Engineer's subscription. Thremark also leads on update cadence (weekly vs fortnightly). Cementing Engineer's advantage is iOS requirement (15.0 vs 26.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Thremark sells 4 in-app purchases, starting at $19.99 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.

On the App Store both sit at effectively the same score — 5.0 for Thremark against 5.0 for Cementing Engineer. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Thremark ships an update weekly, Cementing Engineer fortnightly. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Thremark | Cementing Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/thremark-ai-chat-with-memory/id6760238583/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/cementing-engineer/id6779455442/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | **Freemium** | Subscription |
| Size | 46 MB | 18 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Konstantin Cherniatev](https://appshunter.io/developer/1883396031) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### Thremark

[App page](https://appshunter.io/ios/app/thremark-ai-chat-with-memory/id6760238583)

This AI assistant remembers your personal information to provide contextually relevant answers and proactively engage you. It can generate files, search the web, and create images, all while prioritizing your privacy and integrating seamlessly with iOS.

**Highlights:** Personalized AI memory, Proactive notifications, Dynamic file generation, Multi-model AI support, Web search and summarization, Voice and image generation, Deep iOS integration

**Features:** Safari Extension, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thremark Plus | $19.99 | per month |
| Thremark Pro | $39.99 | per month |
| Plus (Annual) | $179.99 | per year |
| Pro (Annual) | $359.99 | 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 Thremark free?

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

### Is Cementing Engineer free?

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

### Which has better reviews, Thremark or Cementing Engineer?

Thremark and Cementing Engineer are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Thremark or Cementing Engineer have ads?

Neither Thremark nor Cementing Engineer shows ads.

### Which is updated more often, Thremark or Cementing Engineer?

Thremark ships an update weekly, and Cementing Engineer fortnightly. Most recently, Thremark was updated on October 1, 2026 and Cementing Engineer on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*