NASA vs Chronos Notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NASA
Explore the universe with access to live and on-demand NASA+ videos, a vast collection of stunning images, and the latest mission news. Discover interactive augmented reality experiences and track the International Space Station's path.
- NASA+ video streaming
- 21,000+ NASA images
- Latest NASA news
- Mission updates
- Podcasts
- ISS tracking and Sky View
- Augmented reality experiences
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The redesigned NASA App unlocks access to the new NASA+ video streaming service, plus all the latest NASA images, news, mission information, podcasts, and interactive augmented reality experiences to explore -- putting the universe at your fingertips! With the NASA App, you'll be able to: • Explore with unlimited access to NASA+, featuring all of NASA's official live coverage and original on-demand video series. No subscription required. • Easily view over 21,000 of the latest NASA images • Rate images and explore all of the highest rated ones • Read all the latest NASA news and feature articles • Get the latest updates on Artemis, the James Webb Space Telescope, and other exciting NASA missions. • Listen to our podcasts featuring astronauts and experts who take you on a tour of the galaxy without ever leaving Earth. • Set an alert for when the International Space Station will fly over your location and use the Sky View feature to help you locate the station during the visible pass • Experience our rovers and rockets up close and personal with augmented reality. • And so much more! Download the updated NASA App now!
Chronos Notes
Organize historical notes and events into a visual, chronological timeline. Create timelines for any historical period or event, navigate through them, and use tags for easy searching and filtering.
- Chronological timeline creation
- Organize notes by date
- Navigate via timeline or event list
- Tagging for easy filtering
- Search historical events
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Chronos Notes offers a way to organize historical notes into a coherent, chronological timeline. Notes can be created in any order and Chronos Notes will arrange them into a timeline for you. Want to see the first world war mapped in time and place? What about the crusades? You can create any kind of historical events; Chronos Notes will help you organize them. You can navigate using the timeline or view events directly using the event list. Attaching tags to events will help you find them easily through filtering and search.
Screenshots
Verdict
The clearest difference is price: NASA at Free against Chronos Notes's $0.99. NASA also leads on rating (4.8 vs 4.0) and update cadence (every 2 weeks vs every 9 months). Chronos Notes's advantage is review sentiment (100% vs 70%). On ads, in-app purchases, device support and iOS requirement 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
NASA is free to download; Chronos Notes costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NASA holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: NASA has 64K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 70% of NASA's written reviews are positive against 100% of Chronos Notes's, so the app with the better star average is not the one people write more warmly about.
NASA ships an update every 2 weeks, Chronos Notes every 9 months. The most recent releases landed on September 25, 2026 and June 6, 2026 respectively.
| Parameter | NASA | Chronos Notes |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.8 (64K ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 69.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 64K — better | 1 |
| Update frequency | Every 2 weeks — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 60 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | NASA | Jan-Wouter Arendsen |
Customer experience
NASA
Chronos Notes
Bugs and requests
NASA
Reported bugs
4 issues- Crashes on launch for some devices
- Inability to close/exit image viewer
- Notifications not working as expected
- Incompatibility issues with newer iOS versions
Requested features
5 requests- Add live streaming of NASA TV
- Improve navigation and search
- Implement dark mode option
- Bring back old features (e.g. APOD widget, ISS sightings)
- Enhance 3D models and AR capabilities
Chronos Notes
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NASA
No in-app purchases
Chronos Notes
No in-app purchases
