Comparison

Periodic Table vs Arithmetic Worksheet

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 atomic structure of molecules with advanced 3D visualization. Access a comprehensive periodic table, detailed formulas, and scientific resources for enhanced learning and research.

Highlights
  • 3D molecular visualization
  • Atomic structure exploration
  • Comprehensive periodic table
  • Detailed molecular formulas
  • Scientific resources database
  • Chemical analysis tools
Features
Read full description

Chemistry Explorer brings an interactive periodic table, 2D/3D molecules, an equation balancer, and 29 chemistry tools into one focused app for students, teachers, and curious minds. PERIODIC TABLE, PERFECTED • All 118 elements in a clean, color-coded layout • Tap any element for properties, isotopes, spectra, and real-world uses • Instant search by name, symbol, or atomic number MOLECULES IN 2D & 3D • Enter any valid SMILES to generate a structure with RDKit • Search the curated catalog by molecule name or formula • Calculate molecular weight, logP, TPSA, and more on device • Rotate and explore structures in interactive 3D OFFLINE MOLECULE DATABASE • Search 500 source-ranked compounds for free • Chemistry Pro unlocks all 8,000 included compounds • On iOS 26.4 or later, Pro can download the complete 467,735-compound library through Apple 29 TOOLS FOR CHEMISTRY, 25 OF THEM FREE • Balance equations; calculate molar mass and stoichiometry; explore pH/pOH, buffers, gas laws, kinetics, equilibrium, solutions, and more DESIGNED FOR FOCUS • Chemistry calculations and molecular processing run on device; no account required • English, Français, 简体中文, 繁體中文, 日本語, Español, Deutsch, Português, 한국어, Русский, and Tiếng Việt • Optimized for iPhone and iPad Twenty-five of the twenty-nine tools are free, the reaction predictor and every reference table among them, plus two SMILES builds a day and 500 offline compounds. Chemistry Pro is available as monthly, yearly, or lifetime access and unlocks the other four tools — buffers, equilibrium, reaction rate, and Arrhenius — along with unlimited SMILES builds and all 8,000 bundled compounds. Paid users of the original app keep Legacy Pro. Daily free advanced-tool choices: 1. Reopening a chosen tool that day is unlimited. Usage and crash reporting are on by default. You can turn them off in Settings. No advertising ID is collected. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Arithmetic Worksheet

Features
Read full description

1 Select the respondent, and also edit or add user information. 2 Set question types, including addition, subtraction, multiplication, division and mixing. 3 Set the number of questions, as 5, 10, or 20. 4 Complete the questions. 5 Click "Home" to return and save the results to the local album. 6 Please share your learning results with parents.

Screenshots

Periodic Table4 screens
Arithmetic Worksheet4 screens

Verdict

The call

The clearest difference is in-app purchases: Arithmetic Worksheet at none against Periodic Table's 3. Arithmetic Worksheet also leads on iOS requirement (12.0 vs 18.0). Periodic Table's advantage is update cadence (every 5 days vs every 4 months). On price, 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 3 in-app purchases, starting at $0.99 per month. Arithmetic Worksheet asks for nothing beyond the download.

UpkeepUpdate frequency

Periodic Table ships an update every 5 days, Arithmetic Worksheet every 4 months. The most recent releases landed on September 22, 2026 and February 27, 2026 respectively.

Scorecard3 real differences · 7 level
Periodic Table versus Arithmetic Worksheet: the parameters behind the verdict, then further details
ParameterPeriodic TableArithmetic Worksheet
PriceFreeFree
Rating5.0 (2 ratings) — better
Positive reviews72.7% of reviews
Number of ratings2 — better
Update frequencyEvery 5 days — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.012.0 — better
Further details — not scored
Size48 MB87 MB
Age rating12+4+
Developer吉帅 仇Yan Xu

In-app purchases

3 purchases

Periodic Table

Subscriptions2
  • Chemistry Pro Monthly3 Days trial$0.991 Month
  • Chemistry Pro Yearly7 Days trial$2.991 Year
One-time1
  • Chemistry Pro Lifetime$6.99
None

Arithmetic Worksheet

No in-app purchases

Questions

Is Periodic Table free?
Periodic Table is free to download, with in-app purchases available.
Is Arithmetic Worksheet free?
Arithmetic Worksheet is free to download, with no in-app purchases.
Do Periodic Table or Arithmetic Worksheet have ads?
Neither Periodic Table nor Arithmetic Worksheet shows ads.
Which is updated more often, Periodic Table or Arithmetic Worksheet?
Periodic Table ships an update every 5 days, and Arithmetic Worksheet every 4 months. Most recently, Periodic Table was updated on September 22, 2026 and Arithmetic Worksheet on February 27, 2026.

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