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.
DrPhos Science Calculator
Read full descriptionHide full description
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: โข Standard arithmetic and chained calculations โข Scientific-notation and exponent entry โข Adjustable significant-figure formatting โข Normal and scientific result displays โข Clear handling of incomplete entries and invalid operations โข Accessible calculator controls โข Restrained native haptic feedback โข Full offline operation โข 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.
PDE Pro Database Engineer
Read full descriptionHide 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
Verdict
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
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.
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.
| Parameter | DrPhos Science Calculator | PDE Pro Database Engineer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks โ better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 18.5 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 11 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Monte L Helm | Davy Raitt |
In-app purchases
DrPhos Science Calculator
- Quadratic Equation Solver$0.99
- Solution Concentrations$0.99
- Molar Mass Calculator$0.99
Show 7 moreShow fewer
- 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
PDE Pro Database Engineer
No in-app purchases
Questions
Is DrPhos Science Calculator free?
Is PDE Pro Database Engineer free?
Do DrPhos Science Calculator or PDE Pro Database Engineer have ads?
Which is updated more often, DrPhos Science Calculator or PDE Pro Database Engineer?
Other comparisons















