# TEE Colour Doppler vs ECHO On

The clearest difference is price: ECHO On at Free against TEE Colour Doppler's $4.99. ECHO On also leads on rating (4.9 vs 3.0) and update cadence (weekly vs every 24 months). TEE Colour Doppler's advantage is iOS requirement (6.0 vs 15.6). On ads and in-app purchases there is nothing between them.

ECHO On is free to download; TEE Colour Doppler costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ECHO On holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: ECHO On has 14 ratings behind it against 2, so its average is the more settled of the two.

TEE Colour Doppler ships an update every 24 months, ECHO On weekly. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | TEE Colour Doppler | ECHO On |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/tee-colour-doppler/id752231916/reviews) | **[4.9 (14 ratings)](https://appshunter.io/ios/app/echo-on/id1519707786/reviews)** |
| Number of ratings | 2 | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 65 MB | 414 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [University Health Network](https://appshunter.io/developer/361257574) | [Robert Arrigo](https://appshunter.io/developer/1519707788) |

## What reviewers say

### TEE Colour Doppler

[App page](https://appshunter.io/ios/app/tee-colour-doppler/id752231916)

This medical app visualizes cardiac blood flow using 2D and 3D color Doppler imaging. It aids in diagnosing and quantifying the severity of cardiac lesions by demonstrating normal flow patterns across heart structures.

**Highlights:** 2D and 3D echocardiography visualization, Color Doppler imaging for blood flow assessment, Rotatable 3D heart models, Color compare video clips, Demonstrates normal blood flow patterns

**In-app purchases:** none


### ECHO On

[App page](https://appshunter.io/ios/app/echo-on/id1519707786)

This medical education app helps users learn Transesophageal Echocardiography with a question bank, cognitive aid, case log, and reference library. It provides guidance on performing and interpreting a standard 28-view exam, including anatomy, function, and Doppler interrogations.

**Highlights:** Transesophageal Echocardiography education, Enlarging question bank, Rescue TEE cognitive aid, Case Log system, Perioperative Quick Reference library, Offline echo loops, Pathology, technique, and normal loop examples

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

**In-app purchases:** none


## Frequently asked questions

### Is TEE Colour Doppler free?

TEE Colour Doppler costs $4.99, with no in-app purchases.

### Is ECHO On free?

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

### Which has better reviews, TEE Colour Doppler or ECHO On?

ECHO On is rated higher. TEE Colour Doppler averages 3.0 out of 5 from 2 ratings, while ECHO On averages 4.9 from 14 ratings.

### Do TEE Colour Doppler or ECHO On have ads?

Neither TEE Colour Doppler nor ECHO On shows ads.

### Which is updated more often, TEE Colour Doppler or ECHO On?

TEE Colour Doppler ships an update every 24 months, and ECHO On weekly. Most recently, TEE Colour Doppler was updated on October 4, 2026 and ECHO On on October 13, 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.*