# i Sound Level Meter vs GPC

The clearest difference is ads: GPC at none against i Sound Level Meter's shown. GPC also leads on monetization model (free vs ad-supported). i Sound Level Meter's advantage is update cadence (every 2 months vs every 17 months) and review sentiment (22% vs 0%). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

i Sound Level Meter ships an update every 2 months, GPC every 17 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | i Sound Level Meter | GPC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (38 ratings)](https://appshunter.io/ios/app/i-sound-level-meter/id912170360/reviews)** | — |
| Number of ratings | **38** | — |
| Positive reviews | **21.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 17 months |
| Monetization | Ad-supported | **Free** |
| Size | 7 MB | 47 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [Penrite Oil Company](https://appshunter.io/developer/1161277195) |

## What reviewers say

### i Sound Level Meter

[App page](https://appshunter.io/ios/app/i-sound-level-meter/id912170360)

Measure the noise levels around you with this sound meter. Track maximum and minimum decibel values during your measurements. For the most accurate readings, consider using a high-performance noise meter.

**Highlights:** Measures ambient noise levels, Tracks maximum noise values, Tracks minimum noise values, Displays noise measurements

**Features:** Vision Pro support

**In-app purchases:** none


### GPC

[App page](https://appshunter.io/ios/app/gpc/id1425696346)

This app helps users find the right oil and lubricant products for their vehicles. It provides recommendations based on specific vehicle information, ensuring optimal performance and maintenance.

**Highlights:** Product recommendations, Vehicle specific search, GPC store information, Oil and lubricant guide

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

**In-app purchases:** none


## Frequently asked questions

### Is i Sound Level Meter free?

i Sound Level Meter is free to download, with no in-app purchases.

### Is GPC free?

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

### Do i Sound Level Meter or GPC have ads?

i Sound Level Meter shows ads; GPC does not.

### Which is updated more often, i Sound Level Meter or GPC?

i Sound Level Meter ships an update every 2 months, and GPC every 17 months. Most recently, i Sound Level Meter was updated on October 29, 2026 and GPC on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*