# OS Explorer Flashcards vs PSI eGuide

The clearest difference is device support: OS Explorer Flashcards at 2 against PSI eGuide's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | OS Explorer Flashcards | PSI eGuide |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | — | Every 25 months |
| Monetization | Free | — |
| Size | 6 MB | 145 MB |
| Requires iOS | 15.2 | **15.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Xperience Web Hosting Ltd](https://appshunter.io/developer/1570484473) | [Stephen Glassey](https://appshunter.io/developer/1686784623) |

## What reviewers say

### OS Explorer Flashcards

[App page](https://appshunter.io/ios/app/os-explorer-flashcards/id6446698106)

Learn Ordnance Survey map symbols with this free flashcard app. Test your knowledge of symbols used on OS Explorer maps, ideal for beginners in map reading. All images are © Ordnance Survey Limited.

**Highlights:** Learn OS map symbols, Flashcard format, Test map knowledge, Beginner-friendly, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### PSI eGuide

[App page](https://appshunter.io/ios/app/psi-eguide/id6448883102)

**In-app purchases:** none


## Frequently asked questions

### Is OS Explorer Flashcards free?

OS Explorer Flashcards is free to download, with no in-app purchases.

### Is PSI eGuide free?

PSI eGuide is free to download, with no in-app purchases.

---

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