Comparison

Periodic vs DrPhos Science Calculator

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

Head to head
About

Periodic

Features
Read full description

The PeriodicTableElements is an elegant app that is interactive and fun. Easy to use, easy to understand, simple and effective. It shows the periodic table of elements in variety of ways 1) Classic grid with name that is color coded. You can configure it to look however you like. 2) Visually appealing electron distribution. 3) Visually appealing Lewis dot structure. 4) List that can be sorted based on different element properties like group, period, category etc. These awesome periodic tables can be shared by simple double click anywhere on the table. It is possible to copy the periodic table diagrams as high quality SVG xml. Drag your finger on the periodic table canvas to update elements automatically or tap on an element to see more details. Tap on an element and all the rest of the related elements are highlighted. Details of a selected element is shown in a beautifully drawn animated element. Tap on the animated element and you will see more details that can also be shared. Tapping on the list element will navigate you to a page that shows details of the element. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. This is a perfect app if you are a student learning chemistry. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!

About

DrPhos Science Calculator

This scientific calculator app is designed for high school and college students, as well as everyday science tasks. It offers precise control over significant figures and displays results in both normal and scientific formats. The interface is user-friendly with clear controls and helpful error messages, supporting offline use on iPhone and iPad.

Highlights
  • Standard arithmetic and chained calculations
  • Scientific-notation and exponent entry
  • Adjustable significant-figure formatting
  • Normal and scientific result displays
  • Clear error handling
  • Offline operation
  • iPhone and iPad support
Features
Read 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: • Standard arithmetic and chained calculations • Scientific-notation and exponent entry • Adjustable significant-figure formatting • Normal and scientific result displays • Clear handling of incomplete entries and invalid operations • Accessible calculator controls • Restrained native haptic feedback • Full offline operation • 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.

Screenshots

Periodic4 screens
DrPhos Science Calculator2 screens

Verdict

The call

The clearest difference is in-app purchases: Periodic at none against DrPhos Science Calculator's 10. Periodic also leads on iOS requirement (15.1 vs 18.5). DrPhos Science Calculator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 5 weeks). 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. DrPhos Science Calculator sells 10 one-off in-app purchases. Periodic asks for nothing beyond the download.

UpkeepUpdate frequency

Periodic ships an update every 5 weeks, DrPhos Science Calculator every 3 weeks. Both last shipped on November 5, 2026.

Scorecard4 real differences · 5 level
Periodic versus DrPhos Science Calculator: the parameters behind the verdict, then further details
ParameterPeriodicDrPhos Science Calculator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.5
Further details — not scored
Size35 MB11 MB
Age rating4+4+
DeveloperOm Prakash ChapagainMonte L Helm

In-app purchases

None

Periodic

No 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

Questions

Is Periodic free?
Periodic is free to download, with no in-app purchases.
Is DrPhos Science Calculator free?
DrPhos Science Calculator is free to download, with in-app purchases available.
Do Periodic or DrPhos Science Calculator have ads?
Periodic shows ads; DrPhos Science Calculator does not.
Which is updated more often, Periodic or DrPhos Science Calculator?
Periodic ships an update every 5 weeks, and DrPhos Science Calculator every 3 weeks. Most recently, Periodic was updated on November 5, 2026 and DrPhos Science Calculator on November 5, 2026.

Other comparisons