# PRO Basic FirePlus vs Decibel Meter

The clearest difference is update cadence: Decibel Meter at monthly against PRO Basic FirePlus's every 4 months. PRO Basic FirePlus's advantage is iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PRO Basic FirePlus sells 7 one-off in-app purchases and Decibel Meter sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PRO Basic FirePlus ships an update every 4 months, Decibel Meter monthly. The most recent releases landed on September 12, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | PRO Basic FirePlus | Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 3 MB | 1 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DILTS JAPAN, LIMITED LIABILITY CO.](https://appshunter.io/developer/780416956) | [Brais Castro](https://appshunter.io/developer/1604438132) |

## What reviewers say

### PRO Basic FirePlus

[App page](https://appshunter.io/ios/app/pro-basic-fireplus/id1669035416)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GROM JC61 | $3.99 | one-time |
| Z125 PRO | $3.99 | one-time |
| CYGNUS-X FI | $3.99 | one-time |
| NMAX125 SE86J | $3.99 | one-time |
| 4-CYGNUS-X | $3.99 | one-time |
| MAJESTY-S SG28J | $3.99 | one-time |
| FI-MONKEY AB27 | $3.99 | one-time |


### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-sound-level/id6741395557)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $3.99 | per 7 days |
| Yearly subscription | $39.99 | per year |


## Frequently asked questions

### Is PRO Basic FirePlus free?

PRO Basic FirePlus is free to download, with in-app purchases available.

### Is Decibel Meter free?

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

### Do PRO Basic FirePlus or Decibel Meter have ads?

Neither PRO Basic FirePlus nor Decibel Meter shows ads.

### Which is updated more often, PRO Basic FirePlus or Decibel Meter?

PRO Basic FirePlus ships an update every 4 months, and Decibel Meter monthly. Most recently, PRO Basic FirePlus was updated on September 12, 2026 and Decibel Meter on September 27, 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.*