Comparison

Mars Book vs ReactorN

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

Head to head
About

Mars Book

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The Mars Book is an app that is dedicated for observing Mars which will make close approach in summer 2020. Mars will come close to Earth from September 2020 through October 2020. Closest approach will take place on October 6, 2020. Mars Book is a highly useful Mars observing app which will indicate the location of Mars visible in the sky. It shows you why Mars Close Approach will take place, and it is explained readily using animated illustrations and star charts at a viewpoint from outer Space. Mars Close Approaches taking place 23 times from the year 2003 through 2050 will be displayed and apparent retrograde motion of Mars will be displayed. Enjoy Mars Close Approach this summer with the Mars Book app!

About

ReactorN

Features
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Reactor N is a free way for students and the nuclear-curious to explore the U.S. nuclear industry โ€” built to help with your studies, coursework, and thesis. WHAT YOU CAN DO โ€” ALL FREE โ€ข Browse all 94 U.S. nuclear reactors in one place โ€” status, location, and key facts โ€ข Explore the energy-vs-AI-datacenter demand story reshaping the grid (the convergence layer) โ€ข Follow live regulatory activity (NRC + Federal Register) โ€ข Check energy market data (EIA) โ€ข Ask the AI copilot questions about the U.S. nuclear fleet โ€ข Prep for the reactor operator certification exam โ€” flashcards, quizzes, and progress tracking BUILT FOR STUDENTS Whether you study nuclear engineering, energy, policy, or finance, Reactor N gives you real industry data instead of a textbook โ€” useful for class projects, presentations, thesis research, and studying for the reactor operator (RO/SRO) licensing exam. Data is drawn from public sources (NRC, EIA, U.S. Federal Register) so you can trace and cite it. EVERYTHING IS FREE No account required. No subscription. No paywall. Nothing is sold in, through, or in connection with the app. Open the app and explore. ABOUT Reactor N is an independent product from OpenAgent. It aggregates publicly available information for educational and informational purposes only, and is not affiliated with or endorsed by the U.S. Nuclear Regulatory Commission, the U.S. Energy Information Administration, or any utility or reactor operator. All trademarks belong to their respective owners. Privacy Policy: https://openagent-legal.vercel.app/reactorn/privacy

Screenshots

Mars Book3 screens
ReactorN4 screens

Verdict

The call

The clearest difference is iOS requirement: Mars Book at 9.0 against ReactorN's 17.0. On price, ads, in-app purchases and device support 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

Scorecard1 real difference ยท 5 level
Mars Book versus ReactorN: the parameters behind the verdict, then further details
ParameterMars BookReactorN
PriceFreeFree
Update frequencyEvery 13 monthsโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS9.0 โ€” better17.0
Further details โ€” not scored
Size14 MB5 MB
Age rating4+4+
DeveloperVixen Co.,Ltd.TYH DANIEL MC LEAN

In-app purchases

None

Mars Book

No in-app purchases

None

ReactorN

No in-app purchases

Questions

Is Mars Book free?
Mars Book is free to download, with no in-app purchases.
Is ReactorN free?
ReactorN is free to download, with no in-app purchases.
Do Mars Book or ReactorN have ads?
Neither Mars Book nor ReactorN shows ads.

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