Relay Smart Agent vs HMH Science Dimensions
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Relay Smart Agent
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.
- CIPA compliant web filtering
- On/off campus safety
- Student activity reporting
- Hardware-free cloud solution
- Anytime, anywhere filtering
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This app provides anytime, anywhere filtering, safety, and reporting on iOS devices for schools using the Relay web filter from Lightspeed Systems. With the Relay Smart Agent for iOS, schools get: CIPA compliant web filtering On/off campus safety Reporting on student activity A hardware-free cloud solution And more!
HMH Science Dimensions
This augmented reality app transforms book covers into interactive science experiments. Students can scan their textbooks to launch 3D models and explore concepts like weather, solar energy, and the solar system. It's designed to make learning engaging and fun for young students.
- Augmented reality science experiments
- Scan book covers to activate content
- Interactive 3D models
- Explores various science topics
- Engaging learning experience
- Group or pair work friendly
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HMH Science Dimensions AR! (In order to access this app’s content, you will need any Student Edition book cover from HMH’s California Science Dimensions AR program). HMH Science Dimensions AR is an augmented reality tool that turns your students’ book cover into a fun, unique learning experience. To play, open the app and scan the Student Activity Book cover from any grade using a smartphone or tablet. Then watch an augmented reality experiment pop right out of it! HMH Science Dimensions AR gets students out of their seats and thinking about the science they’ll be learning in the coming year. It can also serve as a short, fun homework activity. For target images please go to: https://prod-hmhco-vmg-craftcms-private.s3.amazonaws.com/documents/CA_SD_AR_Covers.pdf Experiments and investigations include… Weather Materials Solar Energy Food Chains Biological Systems Photosynthesis The Solar System Sound Waves How Crystals Form Tips Move your device around the cover and even move the cover itself to get the full experience. The experiments lend themselves well to students working in small groups or pairs. App Info This app does not collect any personally identifiable information. This app contains no social media sharing or links to websites. This app does not track the user’s location. For users age 6 or younger, we recommend child-safe device covers. Avoid pressing buttons or controls outside the main screen area when holding the device as doing so may minimize or close the game.
Screenshots
Verdict
The clearest difference is rating: HMH Science Dimensions at 2.3 against Relay Smart Agent's 1.2. HMH Science Dimensions also leads on review sentiment (25% vs 0%) and iOS requirement (9.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HMH Science Dimensions holds the better App Store score, 2.3 against 1.2. Both are backed by a comparable volume of ratings — 33 and 17 respectively. Written reviews point the same way: 0% of Relay Smart Agent's written reviews are positive against 25% of HMH Science Dimensions's.
Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 2, 2026.
| Parameter | Relay Smart Agent | HMH Science Dimensions |
|---|---|---|
| Price | Free | Free |
| Rating | 1.2 (33 ratings) | 2.3 (17 ratings) — better |
| Positive reviews | 0.0% of reviews | 25.0% of reviews — better |
| Number of ratings | 33 — better | 17 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | Lightspeed Solutions, LLC | Houghton Mifflin Harcourt |
Customer experience
Relay Smart Agent
HMH Science Dimensions
In-app purchases
Relay Smart Agent
No in-app purchases
HMH Science Dimensions
No in-app purchases
Questions
Is Relay Smart Agent free?
Is HMH Science Dimensions free?
Which has better reviews, Relay Smart Agent or HMH Science Dimensions?
Do Relay Smart Agent or HMH Science Dimensions have ads?
Which is updated more often, Relay Smart Agent or HMH Science Dimensions?
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