# Spectrolite vs EyeSound Vocal

The clearest difference is in-app purchases: EyeSound Vocal at none against Spectrolite's 1. EyeSound Vocal also leads on update cadence (every 3 weeks vs every 8 months). Spectrolite's advantage is iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Spectrolite sells 1 one-off in-app purchase. EyeSound Vocal asks for nothing beyond the download.

Spectrolite ships an update every 8 months, EyeSound Vocal every 3 weeks. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Spectrolite | EyeSound Vocal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (65 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** | — |
| Number of ratings | **65** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Waxing Wave](https://appshunter.io/developer/392942046) | [keith house](https://appshunter.io/developer/1728464247) |

## What reviewers say

### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


### EyeSound Vocal

[App page](https://appshunter.io/ios/app/eyesound-vocal/id6476980675)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spectrolite free?

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

### Is EyeSound Vocal free?

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

### Do Spectrolite or EyeSound Vocal have ads?

Neither Spectrolite nor EyeSound Vocal shows ads.

### Which is updated more often, Spectrolite or EyeSound Vocal?

Spectrolite ships an update every 8 months, and EyeSound Vocal every 3 weeks. Most recently, Spectrolite was updated on October 29, 2026 and EyeSound Vocal on October 15, 2026.

---

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