# Light Lab vs Chemistry App

The clearest difference is in-app purchases: Chemistry App at none against Light Lab's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Light Lab sells 2 one-off in-app purchases. Chemistry App asks for nothing beyond the download.

Light Lab ships an update every 3 months, Chemistry App every 4 months. The most recent releases landed on September 14, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Light Lab | Chemistry App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Size | 8 MB | 35 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [THSS](https://appshunter.io/developer/1722239755) | [KheniTech](https://appshunter.io/developer/1580419338) |

## What reviewers say

### Light Lab

[App page](https://appshunter.io/ios/app/light-lab-learn-optics/id6504238420)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase all lenses | $4.99 | one-time |
| Lens Ticket Issuance Function | $9.99 | one-time |


### Chemistry App

[App page](https://appshunter.io/ios/app/chemistry-app/id6762002269)

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

**In-app purchases:** none


## Frequently asked questions

### Is Light Lab free?

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

### Is Chemistry App free?

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

### Do Light Lab or Chemistry App have ads?

Neither Light Lab nor Chemistry App shows ads.

### Which is updated more often, Light Lab or Chemistry App?

Light Lab ships an update every 3 months, and Chemistry App every 4 months. Most recently, Light Lab was updated on September 14, 2026 and Chemistry App on September 25, 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.*