# Decibel Meter vs Focus.AI

The clearest difference is update cadence: Focus.AI at every 3 days against Decibel Meter's every 4 weeks. Focus.AI also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter sells 4 in-app purchases, starting at $4.99 per month and Focus.AI sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Decibel Meter ships an update every 4 weeks, Focus.AI every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Decibel Meter | Focus.AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Size | 14 MB | 32 MB |
| Requires iOS | 17.0 | **16** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nico Schroeder](https://appshunter.io/developer/432790036) | [永生 刘](https://appshunter.io/developer/830484999) |

## 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 |


### Focus.AI

[App page](https://appshunter.io/ios/app/focusai-track-progress/id6751448871)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Quarterly Plan | $5.99 | per 3 months |
| Annual Plan | $17.99 | per year |


## Frequently asked questions

### Is Decibel Meter free?

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

### Is Focus.AI free?

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

### Do Decibel Meter or Focus.AI have ads?

Both Decibel Meter and Focus.AI show ads.

### Which is updated more often, Decibel Meter or Focus.AI?

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