# Efemeris vs InvaZium

The clearest difference is price: InvaZium at Free against Efemeris's $3.99. InvaZium also leads on update cadence (every 6 days vs every 8 months) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

InvaZium 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, InvaZium every 6 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Efemeris | InvaZium |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 days** |
| Size | 130 MB | 54 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DTDA Games](https://appshunter.io/developer/1291540307) | [Daniel Canete Campos](https://appshunter.io/developer/1273575992) |

## What reviewers say

### Efemeris

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

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

**In-app purchases:** none


### InvaZium

[App page](https://appshunter.io/ios/app/invazium/id6480328706)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Efemeris free?

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

### Is InvaZium free?

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

### Do Efemeris or InvaZium have ads?

Neither Efemeris nor InvaZium shows ads.

### Which is updated more often, Efemeris or InvaZium?

Efemeris ships an update every 8 months, and InvaZium every 6 days. Most recently, Efemeris was updated on October 3, 2026 and InvaZium on October 7, 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.*