# Efemeris vs Pax Viking Junior

The clearest difference is price: Pax Viking Junior at Free against Efemeris's $3.99. Pax Viking Junior also leads on update cadence (every 6 weeks vs every 8 months). Efemeris's advantage is iOS requirement (15.0 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

Pax Viking Junior is free to download; Efemeris costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Efemeris ships an update every 8 months, Pax Viking Junior every 6 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Efemeris | Pax Viking Junior |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 weeks** |
| Size | 130 MB | 337 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [DTDA Games](https://appshunter.io/developer/1291540307) | [Ion Game Design](https://appshunter.io/developer/1012297789) |

## What reviewers say

### Efemeris

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

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

**In-app purchases:** none


### Pax Viking Junior

[App page](https://appshunter.io/ios/app/pax-viking-junior/id6738200211)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Efemeris free?

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

### Is Pax Viking Junior free?

Pax Viking Junior is free to download, with no in-app purchases.

### Do Efemeris or Pax Viking Junior have ads?

Neither Efemeris nor Pax Viking Junior shows ads.

### Which is updated more often, Efemeris or Pax Viking Junior?

Efemeris ships an update every 8 months, and Pax Viking Junior every 6 weeks. Most recently, Efemeris was updated on October 25, 2026 and Pax Viking Junior on October 25, 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.*