Comparison

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.

Head to head
About

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.

Highlights
  • CIPA compliant web filtering
  • On/off campus safety
  • Student activity reporting
  • Hardware-free cloud solution
  • Anytime, anywhere filtering
Read full description

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!

About

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.

Highlights
  • 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
Features
Read full description

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

Relay Smart Agent1 screens
HMH Science Dimensions4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 2, 2026.

Scorecard3 real differences · 7 level
Relay Smart Agent versus HMH Science Dimensions: the parameters behind the verdict, then further details
ParameterRelay Smart AgentHMH Science Dimensions
PriceFreeFree
Rating1.2 (33 ratings)2.3 (17 ratings) — better
Positive reviews0.0% of reviews25.0% of reviews — better
Number of ratings33 — better17
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size9 MB227 MB
Age rating4+4+
DeveloperLightspeed Solutions, LLCHoughton Mifflin Harcourt

Customer experience

Relay Smart Agent

All ratings32 ratings
Positive6.3%
Neutral0.0%
Negative93.8%
Written reviews11 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

HMH Science Dimensions

All ratings16 ratings
Positive31.3%
Neutral6.3%
Negative62.5%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

None

Relay Smart Agent

No in-app purchases

None

HMH Science Dimensions

No in-app purchases

Questions

Is Relay Smart Agent free?
Relay Smart Agent is free to download, with no in-app purchases.
Is HMH Science Dimensions free?
HMH Science Dimensions is free to download, with no in-app purchases.
Which has better reviews, Relay Smart Agent or HMH Science Dimensions?
HMH Science Dimensions is rated higher. Relay Smart Agent averages 1.2 out of 5 from 33 ratings, while HMH Science Dimensions averages 2.3 from 17 ratings.
Do Relay Smart Agent or HMH Science Dimensions have ads?
Neither Relay Smart Agent nor HMH Science Dimensions shows ads.
Which is updated more often, Relay Smart Agent or HMH Science Dimensions?
Relay Smart Agent ships an update every 2 months, and HMH Science Dimensions every 2 months. Most recently, Relay Smart Agent was updated on November 2, 2026 and HMH Science Dimensions on November 2, 2026.

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