# Photronium vs Termolisis

The clearest difference is in-app purchases: Termolisis at none against Photronium's 1. Photronium's advantage is update cadence (monthly vs every 2 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. Termolisis asks for nothing beyond the download.

Photronium ships an update monthly, Termolisis every 2 months. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Photronium | Termolisis |
| --- | --- | --- |
| 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 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 5 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hao Nguyen](https://appshunter.io/developer/1546383519) | [Herbert Caller](https://appshunter.io/developer/1352839830) |

## 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 |


### Termolisis

[App page](https://appshunter.io/ios/app/termolisis/id6450969427)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Photronium free?

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

### Is Termolisis free?

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

### Do Photronium or Termolisis have ads?

Neither Photronium nor Termolisis shows ads.

### Which is updated more often, Photronium or Termolisis?

Photronium ships an update monthly, and Termolisis every 2 months. Most recently, Photronium was updated on October 23, 2026 and Termolisis on October 12, 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.*