# COSI Science vs LLSD ParentSquare

The clearest difference is review sentiment: COSI Science at 64% against LLSD ParentSquare's 0%. COSI Science also leads on iOS requirement (11.0 vs 17.0). LLSD ParentSquare's advantage is update cadence (weekly vs every 2 months) and rating (4.4 vs 4.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

LLSD ParentSquare holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 28 and 26 respectively. Written reviews complicate that: 64% of COSI Science's written reviews are positive against 0% of LLSD ParentSquare's, so the app with the better star average is not the one people write more warmly about.

COSI Science ships an update every 2 months, LLSD ParentSquare weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | COSI Science | LLSD ParentSquare |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (28 ratings)](https://appshunter.io/ios/app/cosi-science/id1251512700/reviews) | **[4.4 (26 ratings)](https://appshunter.io/ios/app/llsd-parentsquare/id6480926374/reviews)** |
| Number of ratings | **28** | 26 |
| Positive reviews | **64.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Size | 21 MB | 153 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [COSI](https://appshunter.io/developer/1251512698) | [ParentSquare](https://appshunter.io/developer/908126682) |

## What reviewers say

### COSI Science

[App page](https://appshunter.io/ios/app/cosi-science/id1251512700)

Explore science at home with engaging videos and hands-on activities. Participate in citizen science projects or take virtual tours. This app brings the Center of Science and Industry's educational content to your family.

**Highlights:** At-home science discovery, Engaging science videos, Hands-on science activities, Citizen science participation, Virtual museum tours, Science challenges

**Features:** macOS Compatibility

**In-app purchases:** none


### LLSD ParentSquare

[App page](https://appshunter.io/ios/app/llsd-parentsquare/id6480926374)

This app connects schools and families, providing a centralized platform for communication. It delivers important alerts, messages from teachers, and school updates, ensuring families stay informed about their child's education and school activities.

**Highlights:** School news and updates, Direct messaging with teachers, Automatic language translation, Attendance and fee management, Group conversations, Volunteer and conference sign-ups

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

**In-app purchases:** none


## Frequently asked questions

### Is COSI Science free?

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

### Is LLSD ParentSquare free?

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

### Which has better reviews, COSI Science or LLSD ParentSquare?

LLSD ParentSquare is rated higher. COSI Science averages 4.0 out of 5 from 28 ratings, while LLSD ParentSquare averages 4.4 from 26 ratings.

### Do COSI Science or LLSD ParentSquare have ads?

Neither COSI Science nor LLSD ParentSquare shows ads.

### Which is updated more often, COSI Science or LLSD ParentSquare?

COSI Science ships an update every 2 months, and LLSD ParentSquare weekly. Most recently, COSI Science was updated on October 24, 2026 and LLSD ParentSquare on October 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.*