Comparison

Science 8 vs Rissa Citizen Science

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Science 8

This app offers interactive tools and practice tests to help middle school students visualize and understand key science concepts. It includes simulations for density, molecular activity, and population dynamics, along with practice tests covering various science subjects.

Highlights
  • Interactive molecular activity demonstration
  • Density and buoyancy simulation
  • Comprehensive science practice tests
  • Category building exercises
  • Statistics exploration tool
  • Food web population dynamics simulation
Features
Read full description

These are a few tools for helping visualize middle school science. I spent a year volunteer tutoring middle school (grade 8) science students. While doing that, I created an app with a few simple demonstrations and practice tests to help them. The modules included were those that illustrated or helped practice the concepts my students had trouble either understanding or remembering. The test module contains every test the students took. Hot Molecules is an interactive demonstration of the effects of heating and cooling on molecular activity. Will it float? is an interactive lab simulation for determining density. Questions is a test-practice module for all subjects thus far covered (phase changes, heat transfer, density, atoms, molecules, reactions, atmosphere). Buckets is a category builder to help understand grouping of like things on arbitrary traits Which is Bigger? is an interactive statistics exploration, showing how much overlap there is between categories and how important sample size is. How do population dynamics of the species populations in a food web interact? Play with the simulation and ecological and human-introduced factors. Watch out for natural disasters! Other demonstrations and test topics are added periodically.

About

Rissa Citizen Science

Read full description

Rissa Citizen Science is a mobile platform designed to support citizen scientists and researchers in collecting valuable field data across multiple research initiatives. Join us in this growing platform for citizen science and help bridge the gap between scientific research and community participation! For more information, please visit: www.rissa-cs.org

Screenshots

Science 84 screens
Rissa Citizen Science4 screens

Verdict

The call

The clearest difference is iOS requirement: Science 8 at 11.0 against Rissa Citizen Science's 13.0. On price, update cadence, ads and in-app purchases 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.

UpkeepUpdate frequency

Science 8 ships an update every 3 months, Rissa Citizen Science every 4 months. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 8 level
Science 8 versus Rissa Citizen Science: the parameters behind the verdict, then further details
ParameterScience 8Rissa Citizen Science
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size32 MB57 MB
Age rating4+4+
DeveloperIdeateGamesRissa Citizen Science

In-app purchases

None

Science 8

No in-app purchases

None

Rissa Citizen Science

No in-app purchases

Questions

Is Science 8 free?
Science 8 is free to download, with no in-app purchases.
Is Rissa Citizen Science free?
Rissa Citizen Science is free to download, with no in-app purchases.
Do Science 8 or Rissa Citizen Science have ads?
Neither Science 8 nor Rissa Citizen Science shows ads.
Which is updated more often, Science 8 or Rissa Citizen Science?
Science 8 ships an update every 3 months, and Rissa Citizen Science every 4 months. Most recently, Science 8 was updated on October 2, 2026 and Rissa Citizen Science on October 12, 2026.

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