Comparison

Periodic Table vs eClass

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

Head to head
About

Periodic Table

Explore the universe's language with this interactive chemistry app. It offers a clear, visual, and fact-based approach to understanding elements, isotopes, and chemical reactions. Ideal for students, educators, and curious minds.

Highlights
  • Interactive Periodic Table
  • Detailed Element Cards
  • 3300+ Isotopes
  • Molar Mass Calculator
  • Chemistry Dictionary
  • Reactions & Equations
  • Solubility Chart & Orbital Models
Features
Read full description

▶ Why should you install this? Chemistry isn’t school torture — it’s the language of the universe. And if you still think chemistry is just boring tables, meaningless equations, and endless memorization, then no one ever really showed it to you the right way. This app makes chemistry clear. Useful. Beautiful. No boring lectures. No confusing terms. No ads. Just facts, visuals, and respect for your time. ▶ Who is it for? For students — to understand, not just memorize. For university learners — to save time and stress. For teachers — to keep everything essential within reach. For chemists — to stop dealing with outdated, clunky websites. For anyone curious about how the world really works. ▶ Why you’ll love it • Interactive Periodic Table — flexible layout, filters, and color themes.
• Detailed Element Cards — from atomic data to symmetry and radioactivity.
• 3300+ Isotopes — searchable, filterable, and presented clearly.
• Molar Mass Calculator — handles even the most complex formulas.
• Chemistry Dictionary — short, precise, human-readable definitions.
• Reactions & Equations — with clear conditions and explanations.
• Favorites, notes, and comparison tools to organize your knowledge.
• Solubility chart, orbital models, graphs, and visual symmetry tools. Everything you need — from the classroom to the lab. Chemistry isn’t a dry science — it’s the language of matter. And now, that language fits in your pocket — complete with all the glossaries and data about our universe.

About

eClass

Features
Read full description

WHAT IS ECLASS? - The best online English class for you. - Learn English whenever and wherever. ​ WHY ECLASS? Easy - Exciting - Effective - Learn through Skype at home or wherever and whenever. - Learn any programmes that you expect. - Hit your expectations quickly through lessons which are designed individually and based on student’s level of English.​ TEACHERS - You would like to develop your skills of communication, listening and speaking? Let’s do it by learning English with our native speakers. - Experienced English teachers all over the world would help you to reach this target easily.

Screenshots

Periodic Table4 screens
eClass3 screens

Verdict

The call

The clearest difference is in-app purchases: eClass at none against Periodic Table's 11. eClass also leads on iOS requirement (13.0 vs 16.1). On price, update cadence, ads 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. Periodic Table sells 9 in-app purchases, starting at $0.99 per month. eClass asks for nothing beyond the download.

UpkeepUpdate frequency

Periodic Table ships an update every 6 days, eClass every 11 days. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 8 level
Periodic Table versus eClass: the parameters behind the verdict, then further details
ParameterPeriodic TableeClass
PriceFreeFree
Rating4.8 (5.4K ratings) — better—
Positive reviews88.2% of reviews—
Number of ratings5.4K — better—
Update frequencyEvery 6 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS16.113.0 — better
Further details — not scored
Size152 MB33 MB
Age rating4+4+
DeveloperNikita ChernykhTRI LINH SERVICES AND TRADING COMPANY LIMITED

Bugs and requests

Periodic Table

Reported bugs

2 issues
  • Widget shows incorrect element positions
  • Electron configuration information missing for some elements

Requested features

5 requests
  • Add Arabic language support
  • Improve search functionality
  • Allow full periodic table view
  • Add pronunciation for element names
  • Include more physical constants and data

eClass

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Periodic Table

Subscriptions6
  • Professional: 1 Month$0.991 Month
  • Professional: 6 Months2 variants$3.996 Months
  • Professional: 6 Months7 Days trial$3.996 Months
Show 3 more
  • Professional: 1 Year2 variants$6.991 Year
  • Professional: 1 Year7 Days trial$6.991 Year
  • Professional: 1 Year$14.991 Year
One-time3
  • Professional: Unlimited$14.99
  • Professional: Unlimited$24.99
  • Professional: Unlimited$59.99
None

eClass

No in-app purchases

Questions

Is Periodic Table free?
Periodic Table is free to download, with in-app purchases available.
Is eClass free?
eClass is free to download, with no in-app purchases.
Do Periodic Table or eClass have ads?
Neither Periodic Table nor eClass shows ads.
Which is updated more often, Periodic Table or eClass?
Periodic Table ships an update every 6 days, and eClass every 11 days. Most recently, Periodic Table was updated on October 16, 2026 and eClass on October 13, 2026.

Other comparisons