Mars Book vs Pocket Planets
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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!
Pocket Planets
Explore our solar system with detailed information on planets, moons, and astronauts. Track who is currently in space and receive notifications for new launches. Access NASA images and compare celestial body characteristics.
- Detailed planet and moon data
- Astronaut information and missions
- Real-time space occupancy
- Launch notifications
- NASA image gallery
- Celestial body comparisons
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Pocket Planets gives you all the information you need about our solar system and human activity in space. Learn more about all 565 astronauts who been to space. What was their mission? How long had they been up there? See who is in space now! Get notified when somebody goes into space. Get up to date information about every planet and moon in the solar system. Including: - Physical characteristics: mass, radius, density, gravity, escape velocity - Orbital characteristics: real-time distance from the Sun and Earth, orbital period, orbital speed, eccentricity, apsis, periapsis, visualise orbit - Atmosphere: pressure, atmospheric composition - Images from Nasa - Moons: compare their size and distance
Screenshots
Verdict
The clearest difference is ads: Mars Book at none against Pocket Planets's shown. Mars Book also leads on iOS requirement (9.0 vs 12.0). Pocket Planets's advantage is update cadence (every 3 weeks vs every 13 months). On price, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Mars Book ships an update every 13 months, Pocket Planets every 3 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.
| Parameter | Mars Book | Pocket Planets |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (22 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 22 — better |
| Update frequency | Every 13 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 14 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Vixen Co.,Ltd. | Ad Lunam Kereskedelmi es Szolgaltato Korlatolt Felelossegu Tarsasag |
In-app purchases
Mars Book
No in-app purchases
Pocket Planets
No in-app purchases
Questions
Is Mars Book free?
Is Pocket Planets free?
Do Mars Book or Pocket Planets have ads?
Which is updated more often, Mars Book or Pocket Planets?
Other comparisons
