# Echos. vs Stackwax

The clearest difference is in-app purchases: Echos. at none against Stackwax's 3. Stackwax's advantage is update cadence (every 5 days vs every 2 months) and iOS requirement (15.0 vs 18.6). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Stackwax sells 3 in-app purchases, starting at $4.99 per month. Echos. asks for nothing beyond the download.

Echos. ships an update every 2 months, Stackwax every 5 days. The most recent releases landed on September 29, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Echos. | Stackwax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/echos/id6476243823/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | **Free** | Freemium |
| Size | 22 MB | 18 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gina Victoria](https://appshunter.io/developer/1726277730) | [Martin Allais](https://appshunter.io/developer/1895003438) |

## What reviewers say

### Echos.

[App page](https://appshunter.io/ios/app/echos/id6476243823)

Explore global music by genre, country, or year. Discover trending playlists and top tracks, and create custom playlists. Find local music events and enjoy DJ mode for unique mixes.

**Highlights:** Discover music by genre and country, Find top tracks by country, Search tracks by year or decade, Create custom playlists, DJ mode for custom mixes, Find music events

**In-app purchases:** none


### Stackwax

[App page](https://appshunter.io/ios/app/stackwax/id6762770909)

Instantly identify music playing around you, detect its BPM and key, and add it to your digital library. Organize your music by key or BPM, plan DJ sets, and discover vinyl versions through integrated Discogs listings.

**Highlights:** Real-time track identification, BPM and key detection, Camelot code generation, Digital music library, DJ set planning, Discogs vinyl integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackwax Pro Monthly | $4.99 | per month |
| Stackwax Pro Annual | $34.99 | per year |
| Stackwax Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Echos. free?

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

### Is Stackwax free?

Stackwax is free to download, with in-app purchases available.

### Do Echos. or Stackwax have ads?

Neither Echos. nor Stackwax shows ads.

### Which is updated more often, Echos. or Stackwax?

Echos. ships an update every 2 months, and Stackwax every 5 days. Most recently, Echos. was updated on September 29, 2026 and Stackwax on September 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*