# Burrow Tunnel vs AcoustiCalc

The clearest difference is price: Burrow Tunnel at Free against AcoustiCalc's $3.99. AcoustiCalc's advantage is in-app purchases (none vs 1) and update cadence (daily vs every 2 weeks). On ads, device support and iOS requirement there is nothing between them.

Burrow Tunnel is free to download; AcoustiCalc costs $3.99 up front. Burrow Tunnel sells 1 one-off in-app purchase. AcoustiCalc asks for nothing beyond the download.

Burrow Tunnel ships an update every 2 weeks, AcoustiCalc daily. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Burrow Tunnel | AcoustiCalc |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Size | 45 MB | 43 MB |
| Requires iOS | 17.0 | 17 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [鑫 姜](https://appshunter.io/developer/1893112777) | [TRIMECH Dhaker](https://appshunter.io/developer/1832697893) |

## What reviewers say

### Burrow Tunnel

[App page](https://appshunter.io/ios/app/burrow-tunnel/id6764009166)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Burrow Pro | $14.99 | one-time |


### AcoustiCalc

[App page](https://appshunter.io/ios/app/acousticalc/id6764106645)

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

**In-app purchases:** none


## Frequently asked questions

### Is Burrow Tunnel free?

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

### Is AcoustiCalc free?

AcoustiCalc costs $3.99, with no in-app purchases.

### Do Burrow Tunnel or AcoustiCalc have ads?

Neither Burrow Tunnel nor AcoustiCalc shows ads.

### Which is updated more often, Burrow Tunnel or AcoustiCalc?

Burrow Tunnel ships an update every 2 weeks, and AcoustiCalc daily. Most recently, Burrow Tunnel was updated on October 3, 2026 and AcoustiCalc on October 24, 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.*