Earth Science Explorer vs Project SPECTRA!
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Earth Science Explorer
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Discover fascinating information using the Interactive Earth Science Explorer. Select the topic that you wish to explore and then hit the power button to zoom off to views of the Earth that lead to even more interesting facts. When you arrive a myriad of interesting facts await you. Tap a button access interesting data about each of the topics with include the interior layers of the Earth, the structure and formation of volcanoes, types of rocks, continents and oceans -- all presented in an interactive format. Tap the info button to read interesting facts about each important each topic. Teachers will really like this app. After students have read about the Earth's structure and features, they can tap the quiz button to measure their reading comprehension. In addition to the quiz there is also a word game that helps students review the information presented. Charts and graphs are used to present comparison information about the volcanoes, continents and oceans. Interactive Earth Science Explorer is available for iOS and tvOS devices. It is just beautiful on a big screen TV and would be a wonderfully exciting tool in any science classroom.
Project SPECTRA!
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Learn about the Solar System using real data! The Project SPECTRA! app is a set of interactive lessons to help students learn science topics, particularly how light is used to explore the Solar System. It is meant to be an in-classroom activity, accompanying lessons found here: https://lasp.colorado.edu/home/education/k-12/project-spectra/ The app features interactive activities for 11 different lessons. Some of the activities serve as alternatives to purchasing scientific equipment to use in the classroom. For an accessible version of the app, see the above link.
Verdict
The clearest difference is price: Project SPECTRA! at Free against Earth Science Explorer's $1.99. Earth Science Explorer's advantage is update cadence (every 2 months vs every 33 months) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Project SPECTRA! is free to download; Earth Science Explorer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Earth Science Explorer ships an update every 2 months, Project SPECTRA! every 33 months. The most recent releases landed on September 10, 2026 and June 5, 2026 respectively.
| Parameter | Earth Science Explorer | Project SPECTRA! |
|---|---|---|
| Price | $1.99 | Free โ better |
| Update frequency | Every 2 months โ better | Every 33 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad, Mac, Apple TV โ better | iPad |
| Requires iOS | 12.0 | 12.0 |
| Further details โ not scored | ||
| Size | 57 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Ventura Educational Systems | University of Colorado Boulder |
In-app purchases
Earth Science Explorer
No in-app purchases
Project SPECTRA!
No in-app purchases
Questions
Is Earth Science Explorer free?
Is Project SPECTRA! free?
Do Earth Science Explorer or Project SPECTRA! have ads?
Which is updated more often, Earth Science Explorer or Project SPECTRA!?
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