# National Parks Encyclopedia vs STEM Tutor

The clearest difference is iOS requirement: National Parks Encyclopedia at 15.0 against STEM Tutor's 18.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. National Parks Encyclopedia sells 3 in-app purchases, starting at $2.99 per month and STEM Tutor sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | National Parks Encyclopedia | STEM Tutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (13 ratings)](https://appshunter.io/ios/app/national-parks-encyclopedia/id1131301628/reviews)** | — |
| Number of ratings | **13** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free | — |
| Size | 198 MB | 6 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [Curayt, LLC](https://appshunter.io/developer/1012363586) |

## What reviewers say

### National Parks Encyclopedia

[App page](https://appshunter.io/ios/app/national-parks-encyclopedia/id1131301628)

Discover U.S. National Parks through thousands of articles and high-definition photos. This comprehensive guide offers engaging content suitable for all ages, with offline access for on-the-go learning. Earn badges as you explore.

**Highlights:** Thousands of articles and HD photos, Comprehensive U.S. National Parks information, Simple organization and user interface, Offline access, Badge collection system, Suitable for all ages

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $19.99 | per year |
| Full Version | $9.99 | one-time |


### STEM Tutor

[App page](https://appshunter.io/ios/app/stem-tutor/id6759301043)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STEM Tutor Premium | $0.99 | per month |


## Frequently asked questions

### Is National Parks Encyclopedia free?

National Parks Encyclopedia is free to download, with in-app purchases available.

### Is STEM Tutor free?

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

### Do National Parks Encyclopedia or STEM Tutor have ads?

Neither National Parks Encyclopedia nor STEM Tutor shows ads.

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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.*