# Prime Arch Int. vs Pansophia

The clearest difference is in-app purchases: Prime Arch Int. at none against Pansophia's 10. Prime Arch Int. also leads on iOS requirement (15.0 vs 17.0). Pansophia's advantage is ads (none vs shown) and update cadence (every 4 days vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Pansophia sells 10 one-off in-app purchases. Prime Arch Int. asks for nothing beyond the download.

Prime Arch Int. ships an update every 4 months, Pansophia every 4 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Prime Arch Int. | Pansophia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/pansophia-science-reference/id6760565801/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 54 MB | 29 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV** |
| Age rating | 17+ | 12+ |
| Developer | [aRway AB](https://appshunter.io/developer/1421779695) | [Bonsai Horizons, LLC](https://appshunter.io/developer/1885017794) |

## What reviewers say

### Prime Arch Int.

[App page](https://appshunter.io/ios/app/prime-arch-int/id1492454234)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pansophia

[App page](https://appshunter.io/ios/app/pansophia-science-reference/id6760565801)

Access a vast collection of STEM reference data, including species, chemical compounds, engineering components, and more, all in one place. Features include a scientific calculator, unit converter, and quiz tools. Explore 18 disciplines with extensive cross-references.

**Highlights:** 3,000+ biological species data, 1,200+ chemical compounds reference, Extensive engineering component data, Scientific calculator and unit converter, Quiz and flashcard tools with spaced repetition, Cross-discipline concept linking

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Biomedical Engineering | $0.99 | one-time |
| Unlock Astronomy | $0.99 | one-time |
| Unlock Civil Engineering | $0.99 | one-time |
| Unlock Materials Science | $0.99 | one-time |
| Unlock Artificial Intelligence | $0.99 | one-time |
| Unlock Statistics | $0.99 | one-time |
| Unlock Pharmacology | $0.99 | one-time |
| Unlock Earth Science | $0.99 | one-time |
| Unlock Nuclear Engineering | $0.99 | one-time |
| Unlock All Disciplines | $9.99 | one-time |


## Frequently asked questions

### Is Prime Arch Int. free?

Prime Arch Int. is free to download, with no in-app purchases.

### Is Pansophia free?

Pansophia is free to download, with in-app purchases available.

### Do Prime Arch Int. or Pansophia have ads?

Prime Arch Int. shows ads; Pansophia does not.

### Which is updated more often, Prime Arch Int. or Pansophia?

Prime Arch Int. ships an update every 4 months, and Pansophia every 4 days. Most recently, Prime Arch Int. was updated on November 7, 2026 and Pansophia on October 31, 2026.

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