# CAScience vs PLTW Events

The clearest difference is update cadence: CAScience at fortnightly against PLTW Events's every 3 months. CAScience also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CAScience ships an update fortnightly, PLTW Events every 3 months. The most recent releases landed on September 14, 2026 and August 11, 2026 respectively.

## The numbers

| Metric | CAScience | PLTW Events |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 53 MB | 60 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [California Science Teachers Association](https://appshunter.io/developer/1479599097) | [Project Lead The Way](https://appshunter.io/developer/1439603753) |

## What reviewers say

### CAScience

[App page](https://appshunter.io/ios/app/cascience/id1479599098)

**Features:** macOS Compatibility

**In-app purchases:** none


### PLTW Events

[App page](https://appshunter.io/ios/app/pltw-events/id6615060807)

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

**In-app purchases:** none


## Frequently asked questions

### Is CAScience free?

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

### Is PLTW Events free?

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

### Do CAScience or PLTW Events have ads?

Neither CAScience nor PLTW Events shows ads.

### Which is updated more often, CAScience or PLTW Events?

CAScience ships an update fortnightly, and PLTW Events every 3 months. Most recently, CAScience was updated on September 14, 2026 and PLTW Events on August 11, 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.*