# Birds Complete Reference Guide vs Echoes

The clearest difference is review sentiment: Birds Complete Reference Guide at 100% against Echoes's 38%. Birds Complete Reference Guide also leads on rating (5.0 vs 3.3). Echoes's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Birds Complete Reference Guide sells 1 one-off in-app purchase. Echoes asks for nothing beyond the download.

Birds Complete Reference Guide holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Echoes has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Birds Complete Reference Guide's written reviews are positive against 38% of Echoes's.

## The numbers

| Metric | Birds Complete Reference Guide | Echoes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/birds-complete-reference-guide/id1363773995/reviews)** | [3.3 (22 ratings)](https://appshunter.io/ios/app/echoes/id1529300249/reviews) |
| Number of ratings | 1 | **22** |
| Positive reviews | **100.0% of reviews** | 37.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 171 MB | 79 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Faisal Akhtar](https://appshunter.io/developer/1783643697) | [King's Mobile](https://appshunter.io/developer/547238250) |

## What reviewers say

### Birds Complete Reference Guide

[App page](https://appshunter.io/ios/app/birds-complete-reference-guide/id1363773995)

Explore a comprehensive guide to over 11,400 bird species, featuring high-quality songs, calls, and detailed information. Organize your findings with personal lists and access external resources like Wikipedia for deeper insights. This app helps you manage and learn about birds both online and offline.

**Highlights:** 11,400+ bird species coverage, High-quality bird songs and calls, Offline access to bird data, Search by English or Scientific name, Personalized favorite and finding lists, Links to Wikipedia, Avibase, and Ebird

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertisements | $0.99 | one-time |


### Echoes

[App page](https://appshunter.io/ios/app/echoes/id1529300249)

Visualize and record your heartbeat using your smartphone. Contribute to anonymized research at King's College London and Maastricht University to advance heart diagnosis technologies.

**Highlights:** Hear and visualize heartbeat, Save heart sound recordings, Observe heart sound evolution, Contribute to anonymized research, Understand heart diagnosis limits

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Birds Complete Reference Guide free?

Birds Complete Reference Guide is free to download, with in-app purchases available.

### Is Echoes free?

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

### Which has better reviews, Birds Complete Reference Guide or Echoes?

Birds Complete Reference Guide is rated higher. Birds Complete Reference Guide averages 5.0 out of 5 from 1 ratings, while Echoes averages 3.3 from 22 ratings.

### Do Birds Complete Reference Guide or Echoes have ads?

Birds Complete Reference Guide shows ads; Echoes does not.

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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.*