# Playground Physics vs Relay Smart Agent

The clearest difference is rating: Playground Physics at 4.6 against Relay Smart Agent's 1.2. Playground Physics also leads on review sentiment (40% vs 0%). Relay Smart Agent's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (33 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Playground Physics holds the better App Store score, 4.6 against 1.2. That said, the two scores are not equally well evidenced: Relay Smart Agent has 33 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 40% of Playground Physics's written reviews are positive against 0% of Relay Smart Agent's.

Playground Physics ships an update every 5 months, Relay Smart Agent every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Playground Physics | Relay Smart Agent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/playground-physics/id947124790/reviews)** | [1.2 (33 ratings)](https://appshunter.io/ios/app/relay-smart-agent/id1374371214/reviews) |
| Number of ratings | 5 | **33** |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 45 MB | 9 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [New York Hall of Science](https://appshunter.io/developer/947124789) | [Lightspeed Solutions, LLC](https://appshunter.io/developer/367422071) |

## What reviewers say

### Playground Physics

[App page](https://appshunter.io/ios/app/playground-physics/id947124790)

Record videos of motion, trace paths, and analyze physics concepts like forces and energy. This tool helps educators bring Newton's Laws to life with interactive graphs and slow-motion playback. Ideal for middle and high school science.

**Highlights:** Record and analyze motion in videos, Trace paths and examine movement, Interactive scrubbable graphs, Slow-motion playback, Calculate forces and energy, Save and share performance videos

**In-app purchases:** none


### Relay Smart Agent

[App page](https://appshunter.io/ios/app/relay-smart-agent/id1374371214)

This application offers web filtering and safety features for iOS devices, ensuring CIPA compliance for schools. It provides on and off-campus protection and reports on student activity, acting as a hardware-free cloud solution.

**Highlights:** CIPA compliant web filtering, On/off campus safety, Student activity reporting, Hardware-free cloud solution, Anytime, anywhere filtering

**In-app purchases:** none


## Frequently asked questions

### Is Playground Physics free?

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

### Is Relay Smart Agent free?

Relay Smart Agent is free to download, with no in-app purchases.

### Which has better reviews, Playground Physics or Relay Smart Agent?

Playground Physics is rated higher. Playground Physics averages 4.6 out of 5 from 5 ratings, while Relay Smart Agent averages 1.2 from 33 ratings.

### Do Playground Physics or Relay Smart Agent have ads?

Neither Playground Physics nor Relay Smart Agent shows ads.

### Which is updated more often, Playground Physics or Relay Smart Agent?

Playground Physics ships an update every 5 months, and Relay Smart Agent every 2 months. Most recently, Playground Physics was updated on November 1, 2026 and Relay Smart Agent on November 2, 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.*