# Audio Tools vs Voltage Calculator

The clearest difference is in-app purchases: Voltage Calculator at none against Audio Tools's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Audio Tools sells 2 in-app purchases, starting at $0.99 per 7 days. Voltage Calculator asks for nothing beyond the download.

Audio Tools ships an update every 3 weeks, Voltage Calculator every 2 weeks. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Audio Tools | Voltage Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/audio-tools-vocal-remover/id6752895669/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 72 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [泓 段](https://appshunter.io/developer/1787222594) | [ESDEV Teknoloji](https://appshunter.io/developer/1693053468) |

## What reviewers say

### Audio Tools

[App page](https://appshunter.io/ios/app/audio-tools-vocal-remover/id6752895669)

This audio editing app offers over 20 professional tools for trimming, merging, applying effects, and converting audio formats. It's designed for podcasters, music producers, and video creators, providing a comprehensive solution for all audio needs.

**Highlights:** Audio trimming and merging, Volume and effects adjustment, Format and channel conversion, Speed and pitch shifting, Audio restoration, Extract audio from video, High-quality recording

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audio Tools – Weekly | $0.99 | per 7 days |
| Monthly Audio Tools | $1.99 | per month |


### Voltage Calculator

[App page](https://appshunter.io/ios/app/voltage-calculator/id6790529321)

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio Tools free?

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

### Is Voltage Calculator free?

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

### Do Audio Tools or Voltage Calculator have ads?

Neither Audio Tools nor Voltage Calculator shows ads.

### Which is updated more often, Audio Tools or Voltage Calculator?

Audio Tools ships an update every 3 weeks, and Voltage Calculator every 2 weeks. Most recently, Audio Tools was updated on October 5, 2026 and Voltage Calculator on October 3, 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.*