# PDF vs Cementing Engineer

The clearest difference is review sentiment: Cementing Engineer at 100% against PDF's 0%. Cementing Engineer also leads on ads (none vs shown) and update cadence (fortnightly vs every 110 months). PDF's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

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

PDF ships an update every 110 months, Cementing Engineer fortnightly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF | 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 | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 110 months | **Fortnightly** |
| Monetization | **Ad-supported** | Subscription |
| Size | 193 MB | 18 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ramalingam Sivaramakrishnan](https://appshunter.io/developer/892706271) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### PDF

[App page](https://appshunter.io/ios/app/pdf-unlimited-ocr-scan/id1089003700)

Transform your device into a portable scanner for unlimited multipage documents. Digitize receipts, reports, and more into searchable, editable digital files. Effortlessly share, print, or fax your scanned documents.

**Highlights:** Unlimited multipage scanning, Advanced OCR text extraction, Auto-enhancement and smart cropping, Searchable PDF creation, Flexible export to cloud services, Wireless printing and faxing

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

**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 PDF free?

PDF 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 PDF or Cementing Engineer have ads?

PDF shows ads; Cementing Engineer does not.

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

PDF ships an update every 110 months, and Cementing Engineer fortnightly. Most recently, PDF was updated on October 21, 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.*