Periodic Table vs Arithmetic Worksheet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 3D molecular visualization
- Atomic structure exploration
- Comprehensive periodic table
- Detailed molecular formulas
- Scientific resources database
- Chemical analysis tools
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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/
Arithmetic Worksheet
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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
Verdict
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
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.
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.
| Parameter | Periodic Table | Arithmetic Worksheet |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 72.7% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 48 MB | 87 MB |
| Age rating | 12+ | 4+ |
| Developer | 吉帅 仇 | Yan Xu |
In-app purchases
Periodic Table
- Chemistry Pro Monthly3 Days trial$0.991 Month
- Chemistry Pro Yearly7 Days trial$2.991 Year
- Chemistry Pro Lifetime$6.99
Arithmetic Worksheet
No in-app purchases
Questions
Is Periodic Table free?
Is Arithmetic Worksheet free?
Do Periodic Table or Arithmetic Worksheet have ads?
Which is updated more often, Periodic Table or Arithmetic Worksheet?
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