Mars Book vs Discover Mars
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!
Discover Mars
Explore stunning, high-definition images captured on Mars by NASA rovers. View the latest photos, zoom in for detail, and learn fascinating facts about the Red Planet's atmosphere, gravity, and temperature.
- View latest Mars rover images
- Slideshow mode for full-screen viewing
- Zoom into high-definition photos
- Save images to your device
- Explore Mars' atmosphere, gravity, and temperature
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The Discover Mars app provides easy access to images taken on Mars by the NASA Mars rovers. - View the latest images taken on Mars by the Perseverance, Curiosity, Opportunity, and Spirit rovers. - Tapping on a photo launches it in slideshow mode to view the full high-definition image. You can double-tap to zoom into a photo or tap on the Share icon to save images directly onto your iPhone. - The Mars tab provides interesting visuals about Mars, such as its atmosphere, gravity, temperature, and much more. Designed by Spencer Everett Developed by Monte Thakkar
Screenshots
Verdict
The clearest difference is update cadence: Discover Mars at monthly against Mars Book's every 13 months. Mars Book's advantage is iOS requirement (9.0 vs 13.0). On price, ads, 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, Discover Mars monthly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Mars Book | Discover Mars |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (12 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 12 — better |
| Update frequency | Every 13 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 14 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Vixen Co.,Ltd. | Manthan B Thakkar |
In-app purchases
Mars Book
No in-app purchases
Discover Mars
No in-app purchases
Questions
Is Mars Book free?
Is Discover Mars free?
Do Mars Book or Discover Mars have ads?
Which is updated more often, Mars Book or Discover Mars?
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