# Spectre vs D

The clearest difference is price: D at Free against Spectre's $0.99. Spectre's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 16.0). On ads and device support there is nothing between them.

D is free to download; Spectre costs $0.99 up front. D sells 1 one-off in-app purchase. Spectre asks for nothing beyond the download.

## The numbers

| Metric | Spectre | D |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/spectre/id913027939/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 96 months | — |
| Monetization | Paid | — |
| Size | 46 MB | 28 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Hand](https://appshunter.io/developer/854186096) | [Shoma Kondo](https://appshunter.io/developer/1884832972) |

## What reviewers say

### Spectre

[App page](https://appshunter.io/ios/app/spectre/id913027939)

This audio analysis utility provides real-time FFT and oscilloscope views for sound input. Customize waveform display, control sample rates, and zoom in for detailed analysis on iOS devices.

**Highlights:** FFT Analysis, Oscilloscope, Customizable Waveform, Linear & Logarithmic Forms, Pause/Play Controls, Zoom Functionality

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

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-chorus/id6761195373)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| D-Chorus Full Version | $4.99 | one-time |


## Frequently asked questions

### Is Spectre free?

Spectre costs $0.99, with no in-app purchases.

### Is D free?

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

### Do Spectre or D have ads?

Neither Spectre nor D shows ads.

---

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