# TST FLY vs SonicX Water Eject Audio Meter

The clearest difference is in-app purchases: TST FLY at none against SonicX Water Eject Audio Meter's 3. TST FLY also leads on update cadence (every 3 days vs every 6 weeks) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. SonicX Water Eject Audio Meter sells 3 in-app purchases, starting at $5.99 per 7 days. TST FLY asks for nothing beyond the download.

TST FLY ships an update every 3 days, SonicX Water Eject Audio Meter every 6 weeks. The most recent releases landed on October 26, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | TST FLY | SonicX Water Eject Audio Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sonicx-water-eject-audio-meter/id6503296597/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 57 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHENZHEN TOUCHSTONE TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1441759734) | [INNOVX DİJİTAL HİZMETLER ANONİM ŞİRKETİ](https://appshunter.io/developer/1748062294) |

## What reviewers say

### TST FLY

[App page](https://appshunter.io/ios/app/tst-fly/id1441759735)

**Features:** macOS Compatibility

**In-app purchases:** none


### SonicX Water Eject Audio Meter

[App page](https://appshunter.io/ios/app/sonicx-water-eject-audio-meter/id6503296597)

Maintain your phone's speaker with advanced frequency technology for crystal-clear sound and longevity. This tool accurately measures sound levels and offers a user-friendly interface for easy operation. Enjoy enhanced audio performance and a cleaner listening experience.

**Highlights:** Speaker maintenance, Frequency technology, Decibel measurement, User-friendly interface, Regular updates, Enhance speaker performance

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 days Free Trial - Weekly | $5.99 | per 7 days |
| Monthly | $14.99 | per month |
| Annual | $59.99 | per year |


## Frequently asked questions

### Is TST FLY free?

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

### Is SonicX Water Eject Audio Meter free?

SonicX Water Eject Audio Meter is free to download, with in-app purchases available.

### Do TST FLY or SonicX Water Eject Audio Meter have ads?

Neither TST FLY nor SonicX Water Eject Audio Meter shows ads.

### Which is updated more often, TST FLY or SonicX Water Eject Audio Meter?

TST FLY ships an update every 3 days, and SonicX Water Eject Audio Meter every 6 weeks. Most recently, TST FLY was updated on October 26, 2026 and SonicX Water Eject Audio Meter on October 5, 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.*