# ZettaMic vs Decibels

The clearest difference is in-app purchases: ZettaMic at none against Decibels's 1. ZettaMic also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (9.3 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Decibels sells 1 one-off in-app purchase. ZettaMic asks for nothing beyond the download.

ZettaMic ships an update every 2 months, Decibels every 5 months. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ZettaMic | Decibels |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 12 MB | 6 MB |
| Requires iOS | **9.3** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RCS](https://appshunter.io/developer/348000582) | [Merano Studio Limited](https://appshunter.io/developer/1783493234) |

## What reviewers say

### ZettaMic

[App page](https://appshunter.io/ios/app/zettamic/id1141561379)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibels

[App page](https://appshunter.io/ios/app/decibels/id6749821741)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave a Tip | $0.99 | one-time |


## Frequently asked questions

### Is ZettaMic free?

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

### Is Decibels free?

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

### Do ZettaMic or Decibels have ads?

Neither ZettaMic nor Decibels shows ads.

### Which is updated more often, ZettaMic or Decibels?

ZettaMic ships an update every 2 months, and Decibels every 5 months. Most recently, ZettaMic was updated on November 2, 2026 and Decibels 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.*