Comparison

PDF vs Cementing Engineer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PDF

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
Read full description

PDF-Unlimited OCR Scan transforms your iPhone/iPad into a powerful, portable scanner. Get free, unlimited multipage scans with advanced OCR. Digitize any document, from receipts to reports, into perfect digital files. Scan and Perfect Documents Scan Anything: Receipts, notes, invoices, business cards, contracts – capture it all. Auto-Enhance: Smart cropping and auto-correction ensure clear, sharp scans every time. Extract Text with OCR Powerful OCR: Convert your scans into editable and searchable text. Searchable PDFs: Find specific information easily within your digitized documents. Share and Manage Effortlessly Flexible Export: Email, save to Photos, or upload to Dropbox, Google Drive, iCloud Drive, Box, OneDrive, Evernote, OneNote. Print and Fax: Print wirelessly or fax documents directly from the app. Share Options: Send as PDF or JPEG via social media or email. PDF-Unlimited OCR Scan is your essential, free, and unlimited mobile scanning solution with smart text recognition. Download today and streamline your document management!

About

Cementing Engineer

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
Read full description

Cementing Engineer is a field calculator for oilfield cementing operations, built by a cementer for cementers. The app requires an auto-renewable in-app subscription after the 7-day free trial to access the calculator, Tally Book, saved jobs, schematics, and derived cementing results. Pick the job - conductor, surface, intermediate, production, two-stage, drilling or production liner, balanced plug, kick-off plug, plug & abandon, or Bradenhead squeeze - enter the wellbore geometry and slurry stack, and every number updates live as you type. DERIVED RESULTS, SHOWN WITH THE MATH - Annular, shoe track, and displacement volumes with the capacity factors behind each number - Fluid placement tops and returns at surface - Volume calculations by slurry with sacks and totals - Pump schedule with rates and durations - Thickening time requirements - Hydrostatic, differential, lift, and bump pressures with burst limits - Mix water and total water requirements LIVE WELL SCHEMATIC A measured-depth schematic of casing, open hole, and fluid placement that redraws as the design changes, including two-stage and liner jobs. TALLY BOOK Save any job to the Tally Book: a browsable log of every well with its full design, well information, schematic, and complete derived results. Reopen any saved job straight into the calculator. WORKS IN THE FIELD Calculations run on the device, so the math works with no signal at the wellsite. Sign in with Apple or Google to keep your Tally Book synced across your devices. SUBSCRIPTION REQUIRED AFTER TRIAL Start with a 7-day free trial. After the trial, Apple automatically bills the selected plan unless canceled before renewal: $9.99/month or $79.99/year. Cancel anytime in your App Store account settings. Terms of Use: https://cement-phone-calculator.pages.dev/terms Privacy Policy: https://cement-phone-calculator.pages.dev/privacy Field estimate only - verify final volumes, pressures, and regulatory requirements before pumping.

Screenshots

PDF4 screens
Cementing Engineer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
PDF versus Cementing Engineer: the parameters behind the verdict, then further details
ParameterPDFCementing Engineer
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings—4 — better
Update frequencyEvery 110 monthsFortnightly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size193 MB18 MB
Age rating4+4+
DeveloperRamalingam SivaramakrishnanRondo Wright

Customer experience

PDF

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Cementing Engineer

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PDF

No in-app purchases

2 purchases

Cementing Engineer

Subscriptions2
  • Pro Monthly7 Days trial$9.991 Month
  • Pro Annual7 Days trial$79.991 Year

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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