# Depth vs Copernicus Sentinel

The clearest difference is price: Copernicus Sentinel at Free against Depth's $0.99. Copernicus Sentinel also leads on rating (4.3 vs 1.0) and update cadence (every 2 months vs every 21 months). Depth's advantage is review sentiment (50% vs 14%) 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; Depth costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Copernicus Sentinel holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: Copernicus Sentinel has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Depth's written reviews are positive against 14% of Copernicus Sentinel's, so the app with the better star average is not the one people write more warmly about.

Depth ships an update every 21 months, Copernicus Sentinel every 2 months. The most recent releases landed on August 22, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Depth | Copernicus Sentinel |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/depth/id336473396/reviews) | **[4.3 (18 ratings)](https://appshunter.io/ios/app/copernicus-sentinel/id1036738151/reviews)** |
| Number of ratings | 1 | **18** |
| Positive reviews | **50.0% of reviews** | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 73 MB | 56 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pietro Massimino](https://appshunter.io/developer/332379844) | [ESA - European Space Agency](https://appshunter.io/developer/429660009) |

## What reviewers say

### Depth

[App page](https://appshunter.io/ios/app/depth/id336473396)

Measure the depth of wells, cliffs, and other vertical drops by dropping an object and listening for the impact. It also calculates the speed of a falling object in real-time.

**Highlights:** Measure well and cliff depths, Calculate freefall speed, Real-time drop analysis, Uses sound for measurement

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Depth free?

Depth costs $0.99, with no in-app purchases.

### Is Copernicus Sentinel free?

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

### Which has better reviews, Depth or Copernicus Sentinel?

Copernicus Sentinel is rated higher. Depth averages 1.0 out of 5 from 1 ratings, while Copernicus Sentinel averages 4.3 from 18 ratings.

### Do Depth or Copernicus Sentinel have ads?

Neither Depth nor Copernicus Sentinel shows ads.

### Which is updated more often, Depth or Copernicus Sentinel?

Depth ships an update every 21 months, and Copernicus Sentinel every 2 months. Most recently, Depth was updated on August 22, 2026 and Copernicus Sentinel on October 2, 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.*