# Photronium vs Leanfast Play

The clearest difference is in-app purchases: Leanfast Play at none against Photronium's 1. Photronium's advantage is update cadence (monthly vs every 11 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Photronium sells 1 one-off in-app purchase. Leanfast Play asks for nothing beyond the download.

Photronium ships an update monthly, Leanfast Play every 11 months. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Photronium | Leanfast Play |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/photronium-physics-equations/id1546383517/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 11 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 49 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hao Nguyen](https://appshunter.io/developer/1546383519) | [The Members](https://appshunter.io/developer/1653824858) |

## What reviewers say

### Photronium

[App page](https://appshunter.io/ios/app/photronium-physics-equations/id1546383517)

Access over 360 physics equations with clear explanations and powerful search tools. Test your knowledge with custom quizzes and learn offline anywhere, anytime. This educational reference is designed for learners of all levels.

**Highlights:** 360+ physics equations, Offline access, Intelligent Search, Symbol Search, Customizable quizzes, Bookmarking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multicolored Bookmarks | $0.99 | one-time |


### Leanfast Play

[App page](https://appshunter.io/ios/app/leanfast-play/id6468610951)

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

**In-app purchases:** none


## Frequently asked questions

### Is Photronium free?

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

### Is Leanfast Play free?

Leanfast Play is free to download, with no in-app purchases.

### Do Photronium or Leanfast Play have ads?

Neither Photronium nor Leanfast Play shows ads.

### Which is updated more often, Photronium or Leanfast Play?

Photronium ships an update monthly, and Leanfast Play every 11 months. Most recently, Photronium was updated on October 23, 2026 and Leanfast Play on October 9, 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.*