# Pass Keeper vs Sound Amplifier +

The clearest difference is ads: Pass Keeper at none against Sound Amplifier +'s shown. Pass Keeper also leads on iOS requirement (12.0 vs 16.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Pass Keeper | Sound Amplifier + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (15 ratings)](https://appshunter.io/ios/app/sound-amplifier-plus/id6782403208/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 4 days |
| Monetization | — | Ad-supported |
| Size | 9 MB | 88 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [APPENTUS TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1585307670) | [heekyung moon](https://appshunter.io/developer/6779193748) |

## What reviewers say

### Pass Keeper

[App page](https://appshunter.io/ios/app/pass-keeper-securely-save/id1618577704)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sound Amplifier +

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

Enhance your hearing with real-time audio amplification and sound adjustment. This tool boosts voices and sounds through your earphones, offers a replay function for missed audio, and includes a personalized EQ based on a hearing test. It also features noise reduction and a safety limiter for a clearer listening experience.

**Highlights:** Real-time audio amplification, Replay last 10 seconds, Personalized EQ via hearing test, Voice leveller, Noise reduction, Customizable setups

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

**In-app purchases:** none


## Frequently asked questions

### Is Pass Keeper free?

Pass Keeper 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 Pass Keeper or Sound Amplifier + have ads?

Sound Amplifier + shows ads; Pass Keeper does not.

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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.*