# NASA SpaceTime vs NAPA

The clearest difference is rating: NASA SpaceTime at 5.0 against NAPA's 4.5. NASA SpaceTime also leads on review sentiment (100% vs 75%) and update cadence (every 4 weeks vs every 2 months). NAPA's advantage is iOS requirement (12.0 vs 14.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NASA SpaceTime holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 100% of NASA SpaceTime's written reviews are positive against 75% of NAPA's.

NASA SpaceTime ships an update every 4 weeks, NAPA every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | NASA SpaceTime | NAPA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/nasa-spacetime/id1553555795/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/napa-star-map/id6475964108/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 38 MB | 287 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jet Propulsion Laboratory](https://appshunter.io/developer/347075767) | [National Astronomical Research Institute of Thailand (Public Organization)](https://appshunter.io/developer/1725468782) |

## What reviewers say

### NASA SpaceTime

[App page](https://appshunter.io/ios/app/nasa-spacetime/id1553555795)

Track the current time on Mars for NASA's Perseverance and Curiosity rovers. View mission event schedules and operational meetings. Supports Siri integration for quick time queries.

**Highlights:** Mars time display, Earth time display, Rover mission schedules, Operational meeting views, Siri integration

**In-app purchases:** none


### NAPA

[App page](https://appshunter.io/ios/app/napa-star-map/id6475964108)

Explore the night sky with this astronomy and planetarium app. Identify stars, constellations, and planets by pointing your device at the sky. Plan future observations by adjusting the time and date.

**Highlights:** Point and observe celestial objects, Star map functionality, Time adjustment for observation planning, Simulate planet positions, Locate specific celestial objects, Real images of deep sky objects

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NASA SpaceTime free?

NASA SpaceTime is free to download, with no in-app purchases.

### Is NAPA free?

NAPA is free to download, with no in-app purchases.

### Which has better reviews, NASA SpaceTime or NAPA?

NASA SpaceTime is rated higher. NASA SpaceTime averages 5.0 out of 5 from 7 ratings, while NAPA averages 4.5 from 4 ratings.

### Do NASA SpaceTime or NAPA have ads?

Neither NASA SpaceTime nor NAPA shows ads.

### Which is updated more often, NASA SpaceTime or NAPA?

NASA SpaceTime ships an update every 4 weeks, and NAPA every 2 months. Most recently, NASA SpaceTime was updated on November 3, 2026 and NAPA on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*