III vs Periodic Table PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
III
Calculate material properties for III-V compound semiconductors like AlGaInAsP. It determines compositions, lattice constant, strain, bandgap, and effective masses for InP or GaAs substrates.
- III-V compound semiconductor calculations
- Material property determination
- Composition calculation (x, y, z)
- Lattice constant and strain analysis
- Bandgap and effective mass calculation
- Supports InP and GaAs substrates
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Application to calculate the compositions and material properties of a III-V compound semiconductor. Either InP or GaAs is assumed for the substrate. Some of the compositions and material parameters of the AlGaInAsP compound semiconductor are specified to determine the remain unknown parameters. The following properties are shown as a result: compositions (x, y, z), lattice constant, strain, bandgap, relative energy positions of the conduction and valence bands, and effective masses of the electron and holes.
Periodic Table PRO
Explore a virtual chemistry lab with interactive experiments and detailed information on all chemical elements. Features include atom structure simulations, downloadable PDFs, and studying analytics to enhance learning. Supports multiple languages and offers a cohesive, functional design.
- Virtual chemistry lab with experiments
- Detailed chemical element information
- Atom structure simulations
- Downloadable element PDFs
- Studying analytics
- Multi-language support
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Periodic Table PRO is a multiple-awarded and certified app that provides the following: 01. A virtual laboratory with cool chemistry experiments 02. Concise information for all chemical elements 03. Multi-language support 04. In memoriam Chernobyl 05. Hidden app secrets (easter eggs) 06. Studying analytics 07. Quick search & in-place information filtering 08. Downloadable PDFs for each chemical element 09. Presentation galleries & movie-clips 10. Atom structure simulations 11. Cohesive design focused on functionality 12. Controls for haptic feedback, sounds & visual effects The app complies with IUPAC's (International Union of Pure and Applied Chemistry) latest standardization and is used in more than 148 countries worldwide. Love the app? Rate us! We update the app regularly so we can make it better for you. If you have feedback & questions please visit our website: https://app.periodic-table.pro Periodic Table PRO - The chemistry lab in your pocket.
Screenshots
Verdict
The clearest difference is review sentiment: III at 100% against Periodic Table PRO's 50%. III also leads on in-app purchases (none vs 8) and iOS requirement (11.0 vs 15.0). Periodic Table PRO's advantage is price (Free vs $2.99) and rating (4.6 vs 4.0). On ads, monetization model 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
Periodic Table PRO is free to download; III costs $2.99 up front. Periodic Table PRO sells 8 one-off in-app purchases. III asks for nothing beyond the download.
Periodic Table PRO holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Periodic Table PRO has 87 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of III's written reviews are positive against 50% of Periodic Table PRO's, so the app with the better star average is not the one people write more warmly about.
III ships an update every 17 months, Periodic Table PRO every 6 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | III | Periodic Table PRO |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (1 ratings) | 4.6 (87 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 1 | 87 — better |
| Update frequency | Every 17 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 10 MB | 206 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuya Ishikawa | AGILE FLEX TECH |
Customer experience
III
Periodic Table PRO
In-app purchases
III
No in-app purchases
Periodic Table PRO
- SPECIAL OFFER!$9.99
- Chernobyl experiments$9.99
- Explosive experiments$9.99
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- Funny experiments$9.99
- Experiments with fire$9.99
- Gas bubbles experiments$9.99
- Melting experiments$9.99
- Oxidation experiments$9.99
Questions
Is III free?
Is Periodic Table PRO free?
Which has better reviews, III or Periodic Table PRO?
Do III or Periodic Table PRO have ads?
Which is updated more often, III or Periodic Table PRO?
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