# Sound Meter vs Thought Processor

The clearest difference is ads: Thought Processor at none against Sound Meter's shown. Thought Processor also leads on update cadence (every 2 days vs monthly). Sound Meter's advantage is iOS requirement (15.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Sound Meter sells 3 in-app purchases, starting at $4.99 per month and Thought Processor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sound Meter ships an update monthly, Thought Processor every 2 days. Both last shipped on October 9, 2026.

## The numbers

| Metric | Sound Meter | Thought Processor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (36 ratings)](https://appshunter.io/ios/app/sound-meter-noise-detector-app/id1568927312/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 24 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yalintech](https://appshunter.io/developer/1530568426) | [Brandon Gould](https://appshunter.io/developer/6811041301) |

## What reviewers say

### Sound Meter

[App page](https://appshunter.io/ios/app/sound-meter-noise-detector-app/id1568927312)

Measure and visualize sound levels in decibels with a professional graphic display. Track historical data, back up recordings, and access various device tools like a compass and metal detector. Offers multiple language support and device information.

**Highlights:** Decibel measurement and display, Logarithmic graph for Max/Avg/Min values, Sound data history, Backup and synchronize files, Device information access, Digital compass, Metal detector

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $7.99 | per year |
| One time purchase | $10.99 | one-time |


### Thought Processor

[App page](https://appshunter.io/ios/app/thought-processor/id6811041299)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thought Processor — Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is Sound Meter free?

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

### Is Thought Processor free?

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

### Do Sound Meter or Thought Processor have ads?

Sound Meter shows ads; Thought Processor does not.

### Which is updated more often, Sound Meter or Thought Processor?

Sound Meter ships an update monthly, and Thought Processor every 2 days. Most recently, Sound Meter was updated on October 9, 2026 and Thought Processor on October 9, 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.*