# CloudLabs What is Light? vs Saras

The clearest difference is in-app purchases: CloudLabs What is Light? at none against Saras's 1. CloudLabs What is Light? also leads on iOS requirement (10.0 vs 17.0). Saras's advantage is update cadence (every 4 weeks vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Saras sells 1 in-app purchase, starting at $2.99 per month. CloudLabs What is Light? asks for nothing beyond the download.

CloudLabs What is Light? ships an update every 6 months, Saras every 4 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CloudLabs What is Light? | Saras |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cloudlabs-what-is-light/id1660127883/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 171 MB | 14 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Jiovany Orozco](https://appshunter.io/developer/1114670847) | [Eswar Venigalla](https://appshunter.io/developer/1821499800) |

## What reviewers say

### CloudLabs What is Light?

[App page](https://appshunter.io/ios/app/cloudlabs-what-is-light/id1660127883)

Explore the nature of light through interactive simulations. Classify natural and artificial light sources and experiment with how light interacts with various materials. This educational tool offers a hands-on approach to understanding fundamental physics concepts.

**Highlights:** Classify natural and artificial light sources, Simulate light travel through materials, Interactive educational experiments, Understand light physics concepts

**Features:** macOS Compatibility

**In-app purchases:** none


### Saras

[App page](https://appshunter.io/ios/app/saras-iit-jee/id6769708664)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $2.99 | per month |


## Frequently asked questions

### Is CloudLabs What is Light? free?

CloudLabs What is Light? is free to download, with no in-app purchases.

### Is Saras free?

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

### Do CloudLabs What is Light? or Saras have ads?

Neither CloudLabs What is Light? nor Saras shows ads.

### Which is updated more often, CloudLabs What is Light? or Saras?

CloudLabs What is Light? ships an update every 6 months, and Saras every 4 weeks. Most recently, CloudLabs What is Light? was updated on October 7, 2026 and Saras 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.*