# FlexiGas vs Sound Amplifier +

The clearest difference is ads: FlexiGas at none against Sound Amplifier +'s shown. Sound Amplifier +'s advantage is update cadence (every 4 days vs every 10 days). 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.

FlexiGas ships an update every 10 days, Sound Amplifier + every 4 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FlexiGas | Sound Amplifier + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (14 ratings)](https://appshunter.io/ios/app/sound-amplifier-plus/id6782403208/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | — | Ad-supported |
| Size | 22 MB | 61 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [FLEXIGAS LIMITED](https://appshunter.io/developer/1886681056) | [heekyung moon](https://appshunter.io/developer/6779193748) |

## What reviewers say

### FlexiGas

[App page](https://appshunter.io/ios/app/flexigas/id6760897957)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sound Amplifier +

[App page](https://appshunter.io/ios/app/sound-amplifier-plus/id6782403208)

Enhance your hearing in everyday situations. This tool uses your phone's microphone to amplify nearby sounds and deliver them to your earphones in real time. Adjust sound with an equalizer, reduce background noise, and protect your hearing with a volume limiter.

**Highlights:** Live audio amplification, 3-band equalizer with presets, Speech boost and noise reduction, Left/right balance control, Safe-volume limiter, Offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is FlexiGas free?

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

### Is Sound Amplifier + free?

Sound Amplifier + is free to download, with no in-app purchases.

### Do FlexiGas or Sound Amplifier + have ads?

Sound Amplifier + shows ads; FlexiGas does not.

### Which is updated more often, FlexiGas or Sound Amplifier +?

FlexiGas ships an update every 10 days, and Sound Amplifier + every 4 days. Most recently, FlexiGas was updated on October 24, 2026 and Sound Amplifier + on October 31, 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.*