# Decibel Meter vs ABBY

The clearest difference is in-app purchases: ABBY at none against Decibel Meter's 4. ABBY also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Decibel Meter sells 4 in-app purchases, starting at $4.99 per month. ABBY asks for nothing beyond the download.

Decibel Meter ships an update every 4 weeks, ABBY every 3 weeks. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Decibel Meter | ABBY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Size | 14 MB | 88 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nico Schroeder](https://appshunter.io/developer/432790036) | [Emmanuel Reyes Telles](https://appshunter.io/developer/1237314549) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-noise-analyzer/id6747433637)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Premium | $4.99 | per month |
| One Week Premium | $5.99 | per 7 days |
| One Year Premium | $19.99 | per year |
| Lifetime Premium | $29.99 | one-time |


### ABBY

[App page](https://appshunter.io/ios/app/abby/id6748325690)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter free?

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

### Is ABBY free?

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

### Do Decibel Meter or ABBY have ads?

Decibel Meter shows ads; ABBY does not.

### Which is updated more often, Decibel Meter or ABBY?

Decibel Meter ships an update every 4 weeks, and ABBY every 3 weeks. Most recently, Decibel Meter was updated on October 28, 2026 and ABBY on October 30, 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.*