# Apphemeride Precise Astronomy vs Mars Atlas

The clearest difference is review sentiment: Apphemeride Precise Astronomy at 100% against Mars Atlas's 0%. Apphemeride Precise Astronomy also leads on monetization model (free vs free with in-app purchases). Mars Atlas's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Apphemeride Precise Astronomy sells 2 one-off in-app purchases and Mars Atlas sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Apphemeride Precise Astronomy ships an update every 4 weeks, Mars Atlas fortnightly. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Apphemeride Precise Astronomy | Mars Atlas |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 442 MB | 1.5 GB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Csaba Lengyel](https://appshunter.io/developer/1888397396) | [SOICHIRO NISHI](https://appshunter.io/developer/1896732181) |

## What reviewers say

### Apphemeride Precise Astronomy

[App page](https://appshunter.io/ios/app/apphemeride-precise-astronomy/id6776641899)

This app provides precise astronomical data for sky analysis, including eclipses, Moon motion, and planetary positions. It offers location-based calculations and visual tools to understand celestial events and their visibility.

**Highlights:** Precise sky analysis, Eclipse and Moon motion tracking, Location-based celestial calculations, Horizon Tracker for celestial body movement, Detailed planetary and solar system data, Solar and lunar eclipse simulations, Configurable data display

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-day Trial | Free | one-time |
| Apphemeride Full Unlock | $49.99 | one-time |


### Mars Atlas

[App page](https://appshunter.io/ios/app/mars-atlas-3d-map-and-rovers/id6778795946)

Explore Mars with an interactive 3D globe, detailed imagery, and elevation profiles. Discover 450 Martian features, landing sites, and rover traverses. Includes astronomy calculations and orbital simulations.

**Highlights:** Interactive 3D Mars globe, 450 Martian features and landing sites, High-resolution surface imagery, Elevation profiles, Rover traverse visualization, Astronomy calculations, Earth-Mars orbital simulation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mars Atlas Full Unlock | $9.99 | one-time |


## Frequently asked questions

### Is Apphemeride Precise Astronomy free?

Apphemeride Precise Astronomy is free to download, with in-app purchases available.

### Is Mars Atlas free?

Mars Atlas is free to download, with in-app purchases available.

### Do Apphemeride Precise Astronomy or Mars Atlas have ads?

Neither Apphemeride Precise Astronomy nor Mars Atlas shows ads.

### Which is updated more often, Apphemeride Precise Astronomy or Mars Atlas?

Apphemeride Precise Astronomy ships an update every 4 weeks, and Mars Atlas fortnightly. Most recently, Apphemeride Precise Astronomy was updated on November 7, 2026 and Mars Atlas on November 5, 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.*