# TMS服務系統 vs SoundMeter

The clearest difference is in-app purchases: TMS服務系統 at none against SoundMeter's 1. TMS服務系統 also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.0). SoundMeter's advantage is update cadence (every 2 weeks vs monthly). On price and device support there is nothing between them.

Both are free to download. SoundMeter sells 1 one-off in-app purchase. TMS服務系統 asks for nothing beyond the download.

TMS服務系統 ships an update monthly, SoundMeter every 2 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | TMS服務系統 | SoundMeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 10 MB | 6 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Streams System Corporation](https://appshunter.io/developer/386268761) | [Yusuke Takeuchi](https://appshunter.io/developer/1103617788) |

## What reviewers say

### TMS服務系統

[App page](https://appshunter.io/ios/app/tms/id1551904623)

**In-app purchases:** none


### SoundMeter

[App page](https://appshunter.io/ios/app/soundmeter-decibel-db-meter/id6794570606)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is TMS服務系統 free?

TMS服務系統 is free to download, with no in-app purchases.

### Is SoundMeter free?

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

### Do TMS服務系統 or SoundMeter have ads?

SoundMeter shows ads; TMS服務系統 does not.

### Which is updated more often, TMS服務系統 or SoundMeter?

TMS服務系統 ships an update monthly, and SoundMeter every 2 weeks. Most recently, TMS服務系統 was updated on November 3, 2026 and SoundMeter on November 10, 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.*