# あんしんフィルター for J vs iFansum Decibel Meter

The clearest difference is in-app purchases: あんしんフィルター for J at none against iFansum Decibel Meter's 1. あんしんフィルター for J also leads on iOS requirement (9.0 vs 15.0). iFansum Decibel Meter's advantage is update cadence (every 2 days vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. iFansum Decibel Meter sells 1 in-app purchase, starting at $3.99 per month. あんしんフィルター for J asks for nothing beyond the download.

あんしんフィルター for J ships an update every 6 months, iFansum Decibel Meter every 2 days. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | あんしんフィルター for J | iFansum Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ifansum-decibel-meter/id6760994620/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 105 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KDDI CORPORATION](https://appshunter.io/developer/448137434) | [Xinyang iFansum Technology Co., Ltd.](https://appshunter.io/developer/1887187890) |

## What reviewers say

### あんしんフィルター for J

[App page](https://appshunter.io/ios/app/for-jcom/id1444573440)

This free filtering app for J:COM MOBILE users protects children from inappropriate websites and app usage. It allows parents to set filtering levels, block specific content, and manage usage times remotely. Ensure your child's safe online experience with customizable controls.

**Highlights:** Web filtering for inappropriate content, App usage blocking, Adjustable filtering intensity by age, Remote management of settings, Set internet and app usage times

**Features:** macOS Compatibility

**In-app purchases:** none


### iFansum Decibel Meter

[App page](https://appshunter.io/ios/app/ifansum-decibel-meter/id6760994620)

Measure sound levels with this professional tool. It offers A/C/Z weighting and specialized low-frequency detection for various environments. Document noise issues with photos and location data, and export detailed reports.

**Highlights:** Low-frequency detection (1-100 Hz), A/C/Z weighting, Unlimited audio/video recording, Watermark camera with dB readings, History and PDF export, Privacy-focused, local data storage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter - Monthly Premium | $3.99 | per month |


## Frequently asked questions

### Is あんしんフィルター for J free?

あんしんフィルター for J is free to download, with no in-app purchases.

### Is iFansum Decibel Meter free?

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

### Do あんしんフィルター for J or iFansum Decibel Meter have ads?

Neither あんしんフィルター for J nor iFansum Decibel Meter shows ads.

### Which is updated more often, あんしんフィルター for J or iFansum Decibel Meter?

あんしんフィルター for J ships an update every 6 months, and iFansum Decibel Meter every 2 days. Most recently, あんしんフィルター for J was updated on October 10, 2026 and iFansum Decibel Meter on October 25, 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.*