Comparison

DrPhos Science Calculator vs PDE Pro Database Engineer

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

Head to head
About

DrPhos Science Calculator

Features
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DrPhos Science Calculator is a focused scientific calculator for iPhone and iPad, designed for high school, college, and everyday science work. Enter decimal values or scientific notation, control significant-figure formatting, and view results in both normal and scientific displays. Clear controls, accessible labels, restrained native haptics, and helpful error messages make calculations easier to enter and review. Features include: โ€ข Standard arithmetic and chained calculations โ€ข Scientific-notation and exponent entry โ€ข Adjustable significant-figure formatting โ€ข Normal and scientific result displays โ€ข Clear handling of incomplete entries and invalid operations โ€ข Accessible calculator controls โ€ข Restrained native haptic feedback โ€ข Full offline operation โ€ข Support for iPhone and iPad A separate, user-opened More Chemistry Tools screen provides an optional link to DrPhos Chemistry Pro for those who need additional chemistry tools.

About

PDE Pro Database Engineer

Features
Read full description

PASS YOUR PROFESSIONAL CLOUD DATABASE ENGINEER EXAM 500+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? Certified Google Cloud database engineers earn up to $203K annually (Skillsoft 2024). Professional Cloud Database Engineer validates expertise in designing, managing, and troubleshooting scalable database solutions. WHAT YOU'LL MASTER: Database capacity planning and performance tuning High availability with multi-regional and zonal strategies Database connectivity with networking and encryption Managed vs unmanaged services comparison SQL and NoSQL requirements for structured and unstructured data IAM and access management for database security Monitoring with query optimization and resource contention Backup and recovery with RTO, RPO, and PITR Cost optimization and scaling strategies Database migration with zero-downtime and fallback plans Replication strategies and read replicas Generative AI and LLM database use cases STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into database engineering expertise. Download now. Pass your exam. Master Google Cloud databases.

Screenshots

DrPhos Science Calculator2 screens
PDE Pro Database Engineer3 screens

Verdict

The call

The clearest difference is in-app purchases: PDE Pro Database Engineer at none against DrPhos Science Calculator's 10. PDE Pro Database Engineer also leads on iOS requirement (15.0 vs 18.5). DrPhos Science Calculator's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. DrPhos Science Calculator sells 10 one-off in-app purchases. PDE Pro Database Engineer asks for nothing beyond the download.

UpkeepUpdate frequency

DrPhos Science Calculator ships an update every 3 weeks, PDE Pro Database Engineer every 3 months. The most recent releases landed on September 24, 2026 and September 28, 2026 respectively.

Scorecard3 real differences ยท 3 level
DrPhos Science Calculator versus PDE Pro Database Engineer: the parameters behind the verdict, then further details
ParameterDrPhos Science CalculatorPDE Pro Database Engineer
PriceFreeFree
Update frequencyEvery 3 weeks โ€” betterEvery 3 months
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS18.515.0 โ€” better
Further details โ€” not scored
Size11 MB30 MB
Age rating4+4+
DeveloperMonte L HelmDavy Raitt

In-app purchases

10 purchases

DrPhos Science Calculator

One-time10
  • Quadratic Equation Solver$0.99
  • Solution Concentrations$0.99
  • Molar Mass Calculator$0.99
Show 7 more
  • Ionic Compound Builder$0.99
  • Reaction Balancer$0.99
  • Naming Compounds$0.99
  • pH Calculator$0.99
  • Stoichiometry$0.99
  • Kinetics$0.99
  • Significant Figures Counter$0.99
None

PDE Pro Database Engineer

No in-app purchases

Questions

Is DrPhos Science Calculator free?
DrPhos Science Calculator is free to download, with in-app purchases available.
Is PDE Pro Database Engineer free?
PDE Pro Database Engineer is free to download, with no in-app purchases.
Do DrPhos Science Calculator or PDE Pro Database Engineer have ads?
Neither DrPhos Science Calculator nor PDE Pro Database Engineer shows ads.
Which is updated more often, DrPhos Science Calculator or PDE Pro Database Engineer?
DrPhos Science Calculator ships an update every 3 weeks, and PDE Pro Database Engineer every 3 months. Most recently, DrPhos Science Calculator was updated on September 24, 2026 and PDE Pro Database Engineer on September 28, 2026.

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