# Copernicus Sentinel vs Sundial Builder

The clearest difference is price: Copernicus Sentinel at Free against Sundial Builder's $4.99. Sundial Builder's advantage is update cadence (every 2 days vs every 2 months) and iOS requirement (11.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

Copernicus Sentinel is free to download; Sundial Builder costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Copernicus Sentinel ships an update every 2 months, Sundial Builder every 2 days. The most recent releases landed on October 2, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Copernicus Sentinel | Sundial Builder |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.3 (18 ratings)](https://appshunter.io/ios/app/copernicus-sentinel/id1036738151/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 56 MB | 13 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ESA - European Space Agency](https://appshunter.io/developer/429660009) | [Pietro Massimino](https://appshunter.io/developer/332379844) |

## What reviewers say

### Copernicus Sentinel

[App page](https://appshunter.io/ios/app/copernicus-sentinel/id1036738151)

Explore and track Earth observation satellites in real-time. Discover satellite details, view 3D models, and receive notifications for overhead passes. Stay updated on the latest news and products from this space observation program.

**Highlights:** Real-time satellite tracking, Detailed 3D satellite models, Overhead pass notifications, Latest news and product updates, Historical data transmission visualization, Interactive 3D globe exploration

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

**In-app purchases:** none


### Sundial Builder

[App page](https://appshunter.io/ios/app/sundial-builder/id6747822468)

**In-app purchases:** none


## Frequently asked questions

### Is Copernicus Sentinel free?

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

### Is Sundial Builder free?

Sundial Builder costs $4.99, with no in-app purchases.

### Do Copernicus Sentinel or Sundial Builder have ads?

Neither Copernicus Sentinel nor Sundial Builder shows ads.

### Which is updated more often, Copernicus Sentinel or Sundial Builder?

Copernicus Sentinel ships an update every 2 months, and Sundial Builder every 2 days. Most recently, Copernicus Sentinel was updated on October 2, 2026 and Sundial Builder on September 18, 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.*