# Black Audio Tool vs VPD Tool

The clearest difference is update cadence: VPD Tool at every 2 months against Black Audio Tool's every 24 months. VPD Tool also leads on price ($0.49 vs $1.99). Black Audio Tool's advantage is ratings volume (7 vs 1) and iOS requirement (15.6 vs 18.5). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Black Audio Tool costs $1.99 and VPD Tool $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Black Audio Tool against 5.0 for VPD Tool. That said, the two scores are not equally well evidenced: Black Audio Tool has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Black Audio Tool ships an update every 24 months, VPD Tool every 2 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Black Audio Tool | VPD Tool |
| --- | --- | --- |
| Price | $1.99 | **$0.49** |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/black-audio-tool-bat/id6476655926/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/vpd-tool/id6751213834/reviews) |
| Number of ratings | **7** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.6** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Philippe Zay](https://appshunter.io/developer/1200498230) | [Nicholas Hwang](https://appshunter.io/developer/1802240669) |

## What reviewers say

### Black Audio Tool

[App page](https://appshunter.io/ios/app/black-audio-tool-bat/id6476655926)

This app is a versatile sound generation tool for exploring audio. It allows users to create and control a wide range of sounds, from classic waveforms to various noise colors, with built-in effects for further shaping. Designed for audiophiles, sound designers, and musicians, it offers precise real-time control for creative experimentation.

**Highlights:** Precise waveform generation, Multiple noise colors, Built-in reverb and distortion, Real-time parameter control, Infra sonic and ultra sonic modes, Audio recording to file

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

**In-app purchases:** none


### VPD Tool

[App page](https://appshunter.io/ios/app/vpd-tool/id6751213834)

This utility app helps growers understand Vapor Pressure Deficit (VPD) for optimal plant growth. It features an interactive heatmap and stage presets to guide environmental adjustments. Calculations are performed on-device for privacy.

**Highlights:** Interactive VPD heatmap, Stage-specific VPD ranges, Leaf and Air VPD calculation, Home and Lock Screen widgets, On-device calculations, CSV log export

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

**In-app purchases:** none


## Frequently asked questions

### Is Black Audio Tool free?

Black Audio Tool costs $1.99, with no in-app purchases.

### Is VPD Tool free?

VPD Tool costs $0.49, with no in-app purchases.

### Which has better reviews, Black Audio Tool or VPD Tool?

Black Audio Tool and VPD Tool are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.

### Do Black Audio Tool or VPD Tool have ads?

Neither Black Audio Tool nor VPD Tool shows ads.

### Which is updated more often, Black Audio Tool or VPD Tool?

Black Audio Tool ships an update every 24 months, and VPD Tool every 2 months. Most recently, Black Audio Tool was updated on October 24, 2026 and VPD Tool on October 18, 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.*