# Efemeris vs Spaceship Commander John Ray

The clearest difference is update cadence: Spaceship Commander John Ray at fortnightly against Efemeris's every 8 months. Efemeris's advantage is price ($3.99 vs $5.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Efemeris costs $3.99 and Spaceship Commander John Ray $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Efemeris ships an update every 8 months, Spaceship Commander John Ray fortnightly. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Efemeris | Spaceship Commander John Ray |
| --- | --- | --- |
| Price | **$3.99** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Fortnightly** |
| Size | 130 MB | 65 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 9+ |
| Developer | [DTDA Games](https://appshunter.io/developer/1291540307) | [Adam Musial-Bright](https://appshunter.io/developer/586079623) |

## What reviewers say

### Efemeris

[App page](https://appshunter.io/ios/app/efemeris/id1667323204)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Spaceship Commander John Ray

[App page](https://appshunter.io/ios/app/spaceship-commander-john-ray/id6457432592)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Efemeris free?

Efemeris costs $3.99, with no in-app purchases.

### Is Spaceship Commander John Ray free?

Spaceship Commander John Ray costs $5.99, with no in-app purchases.

### Do Efemeris or Spaceship Commander John Ray have ads?

Neither Efemeris nor Spaceship Commander John Ray shows ads.

### Which is updated more often, Efemeris or Spaceship Commander John Ray?

Efemeris ships an update every 8 months, and Spaceship Commander John Ray fortnightly. Most recently, Efemeris was updated on October 25, 2026 and Spaceship Commander John Ray on October 27, 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.*