Mars Book vs Mars Today
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!
Mars Today
Access the latest images of Mars from NASA's Curiosity rover. Browse current photos or explore past images from Curiosity, Spirit, and Opportunity by SOL. Bookmark and share your favorite discoveries.
- Latest Mars images from Curiosity
- View past images from Spirit and Opportunity
- Browse by Mars SOL
- Bookmark favorite images
- Easy sharing functionality
- No login required
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Mars Today brings you the latest images of Mars from NASA’s Curiosity rover. You can view the current photos or jump to any Mars SOL to view past photos from Curiosity, Spirit, and Opportunity. Bookmark your favorite images and easily share with your friends. No login required. Explore the red planet today!
Screenshots
Verdict
The clearest difference is update cadence: Mars Today at monthly against Mars Book's every 13 months. Mars Book's advantage is iOS requirement (9.0 vs 15.2). 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, Mars Today monthly. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.
| Parameter | Mars Book | Mars Today |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — 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 | 15.2 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Vixen Co.,Ltd. | James Buckhouse |
In-app purchases
Mars Book
No in-app purchases
Mars Today
No in-app purchases
