Science 8 vs Double Displacement Reaction
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Interactive molecular activity demonstration
- Density and buoyancy simulation
- Comprehensive science practice tests
- Category building exercises
- Statistics exploration tool
- Food web population dynamics simulation
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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.
Double Displacement Reaction
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"Double Displacement Reaction" is a comprehensive chemistry lab experiment app for high school students. Explore the intricate world of double displacement reactions through a guided tour, step-by-step protocols, interactive 3D models, and insightful explanations. Key Highlights: 1. Dive into the realm of double displacement reactions 2. Tailored learning for high school students 3. Detailed 3D models and rotational views enhance understanding 4. Audio guide for comprehensive insights 5. Zoom functionality for closer examination Features: 1. Detailed 3D models with labeled apparatus 2. Informative audio guide 3. Rotational models for varied perspectives 4. Ideal for hands-on lab experiments 5. Interactive zoom functionality for detailed examination
Screenshots
Verdict
The clearest difference is price: Science 8 at Free against Double Displacement Reaction's $1.99. Science 8 also leads on update cadence (every 3 months vs every 33 months). On ads, in-app purchases, device support and iOS requirement 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
Science 8 is free to download; Double Displacement Reaction costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Science 8 ships an update every 3 months, Double Displacement Reaction every 33 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.
| Parameter | Science 8 | Double Displacement Reaction |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months — better | Every 33 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 32 MB | 152 MB |
| Age rating | 4+ | 4+ |
| Developer | IdeateGames | VIRTUAL FILAMENTS PRIVATE LIMITED |
In-app purchases
Science 8
No in-app purchases
Double Displacement Reaction
No in-app purchases
Questions
Is Science 8 free?
Is Double Displacement Reaction free?
Do Science 8 or Double Displacement Reaction have ads?
Which is updated more often, Science 8 or Double Displacement Reaction?
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