# LetzFly Ground School vs Physics Playground App

The clearest difference is in-app purchases: Physics Playground App at none against LetzFly Ground School's 10. LetzFly Ground School's advantage is update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. LetzFly Ground School sells 10 one-off in-app purchases. Physics Playground App asks for nothing beyond the download.

LetzFly Ground School ships an update every 5 days, Physics Playground App every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | LetzFly Ground School | Physics Playground App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/physics-playground-app/id6773154302/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 188 MB | 24 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NeatCapital OU](https://appshunter.io/developer/841531887) | [AJA Digital LLC](https://appshunter.io/developer/1329243304) |

## What reviewers say

### LetzFly Ground School

[App page](https://appshunter.io/ios/app/letzfly-ground-school/id6768289173)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Air Law | $5.99 | one-time |
| Aircraft General Knowledge | $5.99 | one-time |
| Flight Performance and Planning | $5.99 | one-time |
| Human Performance | $5.99 | one-time |
| Meteorology | $5.99 | one-time |
| Navigation | $5.99 | one-time |
| Operational Procedures | $5.99 | one-time |
| Principles of Flight | $5.99 | one-time |
| Communications | $5.99 | one-time |
| Unlock All Topics | $29.99 | one-time |


### Physics Playground App

[App page](https://appshunter.io/ios/app/physics-playground-app/id6773154302)

Explore the universe of physics and math through interactive simulations and real-time equation adjustments. Learn concepts from basic counting to advanced theories with hands-on playgrounds and mini-games that earn you badges. Designed for all levels of understanding, from children to PhDs.

**Highlights:** Interactive physics and math playgrounds, Real-time equation adjustments, Adjustable difficulty slider (Child to PhD), Mini-games with badge rewards, Concept map for interconnected ideas, Offline-first functionality, No ads or accounts required

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

**In-app purchases:** none


## Frequently asked questions

### Is LetzFly Ground School free?

LetzFly Ground School is free to download, with in-app purchases available.

### Is Physics Playground App free?

Physics Playground App is free to download, with no in-app purchases.

### Do LetzFly Ground School or Physics Playground App have ads?

Neither LetzFly Ground School nor Physics Playground App shows ads.

### Which is updated more often, LetzFly Ground School or Physics Playground App?

LetzFly Ground School ships an update every 5 days, and Physics Playground App every 3 weeks. Most recently, LetzFly Ground School was updated on October 24, 2026 and Physics Playground App on October 28, 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.*