Comparison

Thremark 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

Thremark

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
Read full description

Most AI answers from the internet. ◆ Thremark answers from your life. • No prompt engineering. Just talk. • No model picking. The right one kicks in. • No black box. See and edit what the AI knows. • No training on your data. API-only, by design. MARKS A fact you own. Your diet, routines, preferences, visible in a list, editable anytime. The AI uses your Marks in every chat without you repeating yourself. You always know what it knows. Set a reminder on any Mark. Thremark notifies you at exactly the right moment. MEMORY RECALLS Save a fact once. The AI brings it back in every conversation automatically. When a saved fact goes quiet too long, Thremark reaches out with a notification: "Still relevant?" Most apps wait to be opened. Thremark reaches out first. FILES Ask the AI to create a habit tracker, workout plan, trip itinerary, money log, or recipe. Your files live in the conversation: tell it to add a row, fix a section, rename a task, or start from scratch and it updates instantly. No editor to open. Just say it. Nobody else does this. Long-press any AI reply to save it as a file and keep it forever. FAST, SMART, AND FULL MODES GPT, Claude, Gemini. • Fast. Everyday questions, instant answers. • Smart. Complex problems, deeper thinking. • Full. Long-form work and deep research. The right AI kicks in automatically, you just ask. WEB SEARCH Real answers with real sources. Ask anything, Thremark finds it, summarizes it, remembers what matters. VOICE AI Tap the mic and talk. Thremark listens, responds, saves facts, and builds files, all in real time. Hands-free. IMAGE GENERATION Describe what you want. AI draws it. Tap to zoom, long-press to save or share. ABOUT YOU An AI portrait built from your conversations. Your interests, work, people. Private. Never leaves your device. WOVEN INTO iOS Siri Shortcuts. Widgets. Spotlight. Share from any app. Focus Filters. Control Center. StandBy. 30 Apple technologies, not bolted on. PRIVACY FIRST Anonymous device ID. No ads. No data sold. Thremark connects to GPT, Claude, and Gemini via API only. API terms are explicit: your conversations are never used to train their models. What you share with Thremark stays yours. Start in seconds. Upgrade when you need more. Privacy Policy: https://thremark.com/privacy Terms of Use: https://thremark.com/terms

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

Thremark4 screens
Cementing Engineer4 screens

Verdict

The call

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.

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. 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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
Thremark versus Cementing Engineer: the parameters behind the verdict, then further details
ParameterThremarkCementing Engineer
PriceFreeFree
Rating5.0 (2 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings23 — better
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size46 MB18 MB
Age rating17+4+
DeveloperKonstantin CherniatevRondo Wright

Customer experience

Thremark

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cementing Engineer

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

In-app purchases

4 purchases

Thremark

Subscriptions4
  • Thremark Plus7 Days trial$19.991 Month
  • Thremark Pro3 Days trial$39.991 Month
  • Plus (Annual)$179.991 Year
Show 1 more
  • Pro (Annual)$359.991 Year
2 purchases

Cementing Engineer

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

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.

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