III vs 元素
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.
元素
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元素記号の暗記アプリです。 化学式も暗記することができます。
Screenshots
Verdict
The clearest difference is price: 元素 at Free against III's $2.99. 元素 also leads on update cadence (every 4 months vs every 17 months). III's advantage is ads (none vs shown) and iOS requirement (11.0 vs 13.0). On in-app purchases 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
元素 is free to download; III costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
III ships an update every 17 months, 元素 every 4 months. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.
| Parameter | III | 元素 |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 17 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 87 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuya Ishikawa | Ohmori Takeru |
In-app purchases
III
No in-app purchases
元素
No in-app purchases
