CassiniMIMI vs Pocket Planets
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CassiniMIMI
Explore stunning images and data from NASA's Cassini mission to Saturn. This app provides access to energetic particle data, ENA images, and spectrograms from Saturn's magnetosphere. Discover new scientific releases and browse daily updated plots and movies.
- Energetic charged particle environment study
- Energetic Neutral Atom (ENA) imaging of Saturn
- Spectrograms and plots from particle detectors
- Access to NASA's Planetary Data System (PDS)
- Daily updated plots and movies
- Selectable data by source, type, date, and style
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NASA’s Cassini mission to Saturn has provided a unique opportunity for the Magnetospheric IMaging Instruments (MIMI) to study the energetic charged particle environment, and obtain images of Saturn using Energetic Neutral Atom (ENA) imaging. There is a rich dataset of spectrograms, plots, movies, and images that are now accessible via a dedicated iOS app. Among the data products within the MIMI suite that are viewable through the app, include the ENA images of Saturn taken with the Ion and Neutral CAmera (INCA), and spectrograms and line plots from the Low Energy Magnetospheric Measurement System (LEMMS) and CHarge Energy Mass Spectrometer (CHEMS) particle detectors. The instrument health and safety data are restricted to Cassini team members, while the calibrated science data are available to all. The CassiniMIMI app provides easy access to some of Cassini browse products that are currently in NASA’s publically accessible Planetary Data System (PDS). For some products, the public is now able to see the most up-to-date plots produced on a daily basis. Also, the public now has access to new MIMI data products that are only in the process of being released to PDS. The publically available browse products are selectable by source, type, date, style, plots, and movies. Click on the link below to checkout a description of the public menu selections, highlights of the display, samples of public plots and movies, what’s shown in the icon, and links to supporting links, including the Cassini MIMI website, instrument user’s guide, and archive at PDS.
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: CassiniMIMI at none against Pocket Planets's shown. CassiniMIMI also leads on review sentiment (100% vs 67%) and rating (5.0 vs 4.6). Pocket Planets's advantage is ratings volume (22 vs 2). 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.
CassiniMIMI holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Pocket Planets has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of CassiniMIMI's written reviews are positive against 67% of Pocket Planets's.
CassiniMIMI ships an update weekly, Pocket Planets every 3 weeks. The most recent releases landed on October 8, 2026 and September 8, 2026 respectively.
| Parameter | CassiniMIMI | Pocket Planets |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.6 (22 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 2 | 22 — better |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 19 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Johns Hopkins University Applied Physics Laboratory | Ad Lunam Kereskedelmi es Szolgaltato Korlatolt Felelossegu Tarsasag |
Customer experience
CassiniMIMI
Pocket Planets
In-app purchases
CassiniMIMI
No in-app purchases
Pocket Planets
No in-app purchases
Questions
Is CassiniMIMI free?
Is Pocket Planets free?
Which has better reviews, CassiniMIMI or Pocket Planets?
Do CassiniMIMI or Pocket Planets have ads?
Which is updated more often, CassiniMIMI or Pocket Planets?
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