# III vs GED EXAM PREP 2026

The clearest difference is review sentiment: III at 100% against GED EXAM PREP 2026's 33%. III also leads on in-app purchases (none vs 10) and iOS requirement (11.0 vs 15.1). GED EXAM PREP 2026's advantage is price (Free vs $2.99) and rating (4.7 vs 4.0). On ads and device support there is nothing between them.

GED EXAM PREP 2026 is free to download; III costs $2.99 up front. GED EXAM PREP 2026 sells 9 in-app purchases, starting at $7.99 per 7 days. III asks for nothing beyond the download.

GED EXAM PREP 2026 holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: GED EXAM PREP 2026 has 334 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 33% of GED EXAM PREP 2026'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, GED EXAM PREP 2026 fortnightly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | III | GED EXAM PREP 2026 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/iii-v-comp/id475184953/reviews) | **[4.7 (334 ratings)](https://appshunter.io/ios/app/ged-exam-prep-2026/id6748577406/reviews)** |
| Number of ratings | 1 | **334** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 10 MB | 128 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [Prepia Inc](https://appshunter.io/developer/1843388606) |

## What reviewers say

### III

[App page](https://appshunter.io/ios/app/iii-v-comp/id475184953)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GED EXAM PREP 2026

[App page](https://appshunter.io/ios/app/ged-exam-prep-2026/id6748577406)

Prepare for your GED exam with expert-designed study tools. Features adaptive learning, practice tests, and detailed feedback to help you earn your certificate. Start with free access and unlock unlimited questions and personalized plans.

**Highlights:** Complete exam coverage (2026 updated), Expertly crafted practice questions, Smart learning plans, Real exam simulator, Instant feedback and explanations, Progress tracking, Personalized daily goals

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $7.99 | per 7 days |
| Weekly Subscription | $11.99 | per 7 days |
| Monthly Subscription | $16.99 | per month |
| Monthly Subscription | $16.99 | per month |
| Monthly Subscription | $19.99 | per month |
| Monthly Subscription | $19.99 | per month |
| 3 Months Subscription | $29.99 | per 3 months |
| 6 Months Subscription | $49.99 | per 6 months |
| 6 Months Subscription | $49.99 | per 6 months |


## Frequently asked questions

### Is III free?

III costs $2.99, with no in-app purchases.

### Is GED EXAM PREP 2026 free?

GED EXAM PREP 2026 is free to download, with in-app purchases available.

### Which has better reviews, III or GED EXAM PREP 2026?

GED EXAM PREP 2026 is rated higher. III averages 4.0 out of 5 from 1 ratings, while GED EXAM PREP 2026 averages 4.7 from 334 ratings.

### Do III or GED EXAM PREP 2026 have ads?

Neither III nor GED EXAM PREP 2026 shows ads.

### Which is updated more often, III or GED EXAM PREP 2026?

III ships an update every 17 months, and GED EXAM PREP 2026 fortnightly. Most recently, III was updated on November 6, 2026 and GED EXAM PREP 2026 on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*