# Average Variable Cost vs Headphone Sound Check

The clearest difference is in-app purchases: Average Variable Cost at none against Headphone Sound Check's 1. Average Variable Cost also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Headphone Sound Check sells 1 one-off in-app purchase. Average Variable Cost asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Average Variable Cost | Headphone Sound Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/headphone-sound-check/id6771039438/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 36 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Nadzeya Yashchuk](https://appshunter.io/developer/1835856077) |

## What reviewers say

### Average Variable Cost

[App page](https://appshunter.io/ios/app/average-variable-cost/id1618659899)

**Features:** macOS Compatibility

**In-app purchases:** none


### Headphone Sound Check

[App page](https://appshunter.io/ios/app/headphone-sound-check/id6771039438)

Verify new headphones or earbuds function perfectly with quick, accurate audio tests. Check channels, stereo balance, bass response, and microphone quality. An optional upgrade offers detailed reports and an ad-free experience.

**Highlights:** Left/Right channel balance test, Stereo sweep and bass pulse tests, Full frequency spectrum sweep, White and pink noise generation, Spatial audio and head tracking test, Microphone record and playback test, Detailed test reports (Pro)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | one-time |


## Frequently asked questions

### Is Average Variable Cost free?

Average Variable Cost is free to download, with no in-app purchases.

### Is Headphone Sound Check free?

Headphone Sound Check is free to download, with in-app purchases available.

### Do Average Variable Cost or Headphone Sound Check have ads?

Neither Average Variable Cost nor Headphone Sound Check shows ads.

### Which is updated more often, Average Variable Cost or Headphone Sound Check?

Average Variable Cost ships an update every 3 weeks, and Headphone Sound Check every 3 weeks. Most recently, Average Variable Cost was updated on October 27, 2026 and Headphone Sound Check on October 28, 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.*