Solar System Scope vs TestByState
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar System Scope
Explore and discover the solar system and outer space with realistic 3D visualizations and detailed celestial simulations. This app offers an educational and engaging experience for all ages, featuring a comprehensive encyclopedia and a night sky observatory.
- 3D Encyclopedia of celestial bodies
- Realistic 3D visualizations
- Night sky observatory with time simulation
- Accurate orbital parameter calculations
- High-quality planetary and moon maps
- Multilingual support
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Solar System Scope is a fun way of Exploring, Discovering and Playing with the Solar System and Outer Space. Solar System Scope (or just Solar) contains many views and celestial simulations, but most of all - it brings you closer to the furthest reaches of our world and lets you experience lots of fantastic space sceneries. It aspires to be the most illustrative, easy to understand and simple to use space model. - 3D Encyclopedia In Solar’s unique encyclopedia you will find the most interesting facts about every planet, dwarf planet, every major moon and more – and everything is accompanied by realistic 3D visualizations. Solar’s encyclopedia is available in 10 languages: English, Spanish, German, Russian, Italian, Korean and Slovak. More languages are coming soon! - Nightsky Observatory Enjoy Stars and constellation of the night sky as viewed from any given location on Earth. You can point your device at the sky to see all objects in their proper place, but you can also simulate Night sky in the past or in the future. Now with advanced options that let you simulate ecliptic, equatorial and azimuthal line, or grid (among other things). - Scientific Instrument Solar System Scope calculations are based on up-to-date orbital parameters published by NASA and let you simulate celestial positions at any given time. - For Everyone Solar System Scope is well suited for all audiences and ages: It is enjoyed by space enthusiasts, teachers, scientists, but Solar is successfully used even by children of 4+ years of age! - Unique Maps We are proud to present a very unique set of planetary and moon maps, that let you experience a true-color space as never before. These accurate maps are based on NASA elevation and imagery data. Colors and shades of the textures are tuned according to true-color photos made by Messenger, Viking, Cassini and New Horizon spacecrafts, and the Hubble Space Telescope. Basic resolution of these maps is for free – but if you would like the best experience, you can check out the highest quality, which is available with In-App purchase. - Join our vision Our vision is to build the ultimate space model and bring you the deepest space experience. And you can help - try Solar System Scope and if you like it, spread the word! And don’t forget to join the community and vote for new features on our homepage.
TestByState
Prepare for Massachusetts MCAS Math with grade-specific practice tests and daily sets for grades 3-8 and 10. Focus on specific topics or complete full-length simulations with detailed explanations and progress tracking for parents. One subscription covers up to five learners.
- Grade-specific practice (3-8, 10)
- Daily practice sets
- Practice by topic
- Full practice tests
- Detailed answer explanations
- Parent progress insights
- Supports up to 5 learners
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Math practice built for your state test. TestByState gives students targeted math practice while giving parents a clear view of their progress. Build a routine with daily questions, topic-focused review, and full-length practice tests designed around supported state assessments. Connect your child’s iPhone or iPad and see scores, strengths, and areas that need more practice from the parent dashboard on your own device. CHOOSE YOUR ASSESSMENT • Massachusetts MCAS Math — Grades 3–8 and 10 • Florida FAST Math — Grades 3–8 • Virginia SOL / Growth Math — Grades 3–8 • North Carolina EOG Math • Georgia Milestones Math • Ohio State Tests Math • Tennessee TCAP Math • Arizona AASA Math • New Jersey NJSLA Math See the assessment selector for supported grades. Each assessment keeps its own content, reporting categories, practice forms, calculator rules, and reference materials. Florida practice uses fixed-form PM3-style questions; the operational FAST assessment is computer-adaptive. STUDENTS PRACTICE. PARENTS FOLLOW PROGRESS. • Fresh questions for daily practice • Focused practice by topic • State-specific full and section practice tests • Clear explanations and answer review • Parent progress, recent results, and areas to practice next • Separate learner profiles with assessment-specific histories • Student-device pairing and optional practice reminders Parents create and manage the account, choose an assessment and grade, and connect each child’s device with a pairing code or QR code. Students practice in their own learner profile while parents review their progress. You can also use the same device for practice. Switching assessments keeps practice and progress separate. ONE PLAN. YOUR WHOLE FAMILY. One TestByState All Access subscription includes all supported state assessments, all included practice modes, and up to 5 learners per state. Choose monthly or annual billing. An active subscription is required for access. Your localized price, renewal terms, and any eligible introductory offer are shown before purchase. Creating an account does not start a free trial. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel an Apple subscription in your Apple account settings. Restore Purchases is available in the app. TestByState is an independent practice product. It is not affiliated with, endorsed by, or an official product of any state education agency. Questions are original practice content. Results are not official state test scores or guaranteed score predictions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Service terms: https://testbystate.com/terms Privacy: https://testbystate.com/privacy Support: https://testbystate.com/support
Screenshots
Verdict
The clearest difference is rating: TestByState at 5.0 against Solar System Scope's 4.4. TestByState also leads on update cadence (weekly vs every 4 months). Solar System Scope's advantage is ratings volume (882 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and monetization model 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. Solar System Scope sells 1 one-off in-app purchase and TestByState sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
TestByState holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Solar System Scope has 882 ratings behind it against 1, so its average is the more settled of the two.
Solar System Scope ships an update every 4 months, TestByState weekly. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.
| Parameter | Solar System Scope | TestByState |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (882 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 76.5% of reviews | — |
| Number of ratings | 882 — better | 1 |
| Update frequency | Every 4 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 154 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | INOVE, s.r.o. | Mahdi Alhady |
Customer experience
Solar System Scope
TestByState
Bugs and requests
Solar System Scope
Reported bugs
4 issues- Crashes when dragging Jupiter
- Upside-down orientation on tablets
- Unable to restore purchases
- Freezes and crashes on launch
Requested features
5 requests- Add more celestial bodies (Messier objects, Planet 9/10, black holes, etc.)
- Enable exploration of other galaxies and deep space objects
- Improve telescope/zoom functionality
- Add more moons and irregular satellites
- Implement continental drift and solar system evolution
TestByState
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solar System Scope
- HQ Textures / No Ads$5.99
TestByState
- MCAS Math Test Prep Monthly3 Days trial$7.991 Month
- MCAS Math Test Prep Annual7 Days trial$29.991 Year
Questions
Is Solar System Scope free?
Is TestByState free?
Which has better reviews, Solar System Scope or TestByState?
Do Solar System Scope or TestByState have ads?
Which is updated more often, Solar System Scope or TestByState?
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