# EchoLab vs Observe.

The clearest difference is price: Observe. at Free against EchoLab's $4.99. Observe. also leads on iOS requirement (13.0 vs 18.0). EchoLab's advantage is update cadence (every 4 months vs every 8 months). On ads, in-app purchases and device support there is nothing between them.

Observe. is free to download; EchoLab costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EchoLab ships an update every 4 months, Observe. every 8 months. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | EchoLab | Observe. |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Monetization | Paid | — |
| Size | 46 MB | 29 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Medical Appware, LLC](https://appshunter.io/developer/427460808) | [SELECT ICT Systems SAE](https://appshunter.io/developer/1780577476) |

## What reviewers say

### EchoLab

[App page](https://appshunter.io/ios/app/echolab/id427460805)

This app provides a comprehensive framework for teaching and performing quantitative echocardiography. It offers a wide array of calculations, graphical displays of equations, and integrates current guidelines for a cohesive overview of cardiac ultrasound analysis. A companion Apple Watch app is also included for on-the-go reference.

**Highlights:** Quantitative echocardiography calculations, Integration of ASE/EACVI guidelines, Analytic Engine for synthesized results, Companion Apple Watch app, Graphical display of equations, Medical literature references with hyperlinks, Wide array of echocardiographic calculations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Observe.

[App page](https://appshunter.io/ios/app/observe/id6738393422)

**In-app purchases:** none


## Frequently asked questions

### Is EchoLab free?

EchoLab costs $4.99, with no in-app purchases.

### Is Observe. free?

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

### Do EchoLab or Observe. have ads?

Neither EchoLab nor Observe. shows ads.

### Which is updated more often, EchoLab or Observe.?

EchoLab ships an update every 4 months, and Observe. every 8 months. Most recently, EchoLab was updated on September 22, 2026 and Observe. on September 15, 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.*