# Low Frequency Detector vs Ai OBD Car Scanner

The clearest difference is price: Ai OBD Car Scanner at Free against Low Frequency Detector's $9.99. Ai OBD Car Scanner also leads on update cadence (every 2 months vs every 9 months) and iOS requirement (13 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

Ai OBD Car Scanner is free to download; Low Frequency Detector costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Low Frequency Detector ships an update every 9 months, Ai OBD Car Scanner every 2 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | Ai OBD Car Scanner |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 104 MB |
| Requires iOS | 26.2 | **13** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [yuui okuyama](https://appshunter.io/developer/6779515462) |

## What reviewers say

### Low Frequency Detector

[App page](https://appshunter.io/ios/app/low-frequency-detector/id1196584147)

This tool measures and analyzes low-frequency sounds that are difficult for the human ear to detect. It helps identify potential noise pollution from sources like construction or factories, providing detailed reports on frequency components and sound levels.

**Highlights:** Low-frequency power level measurement (<100Hz), Audible band power level measurement (Leq), 1/3 octave band analysis (OCT), FFT analysis (FFT), Time course graph (TIME), Measurement report generation, Calibration function

**In-app purchases:** none


### Ai OBD Car Scanner

[App page](https://appshunter.io/ios/app/ai-obd-car-scanner/id6779515460)

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

**In-app purchases:** none


## Frequently asked questions

### Is Low Frequency Detector free?

Low Frequency Detector costs $9.99, with no in-app purchases.

### Is Ai OBD Car Scanner free?

Ai OBD Car Scanner is free to download, with no in-app purchases.

### Do Low Frequency Detector or Ai OBD Car Scanner have ads?

Neither Low Frequency Detector nor Ai OBD Car Scanner shows ads.

### Which is updated more often, Low Frequency Detector or Ai OBD Car Scanner?

Low Frequency Detector ships an update every 9 months, and Ai OBD Car Scanner every 2 months. Most recently, Low Frequency Detector was updated on November 2, 2026 and Ai OBD Car Scanner on October 31, 2026.

---

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