# Sound Amplifier vs Citation Mapper

The clearest difference is update cadence: Citation Mapper at daily against Sound Amplifier's every 2 weeks. Citation Mapper also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sound Amplifier sells 4 in-app purchases, starting at $9.99 per month and Citation Mapper sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sound Amplifier ships an update every 2 weeks, Citation Mapper daily. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Sound Amplifier | Citation Mapper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.2K ratings)](https://appshunter.io/ios/app/sound-amplifier/id1615079093/reviews)** | — |
| Number of ratings | **1.2K** | — |
| Positive reviews | 34.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 26 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Mighty Fine Apps LLC](https://appshunter.io/developer/973529494) | [Adeyemi Salau](https://appshunter.io/developer/1618952741) |

## What reviewers say

### Sound Amplifier

[App page](https://appshunter.io/ios/app/sound-amplifier/id1615079093)

Transform your phone into a powerful hearing aid. This app amplifies sound up to 100x, enhances voice clarity, and reduces background noise. Protect your hearing while easily listening to conversations, lectures, or TV with connected headphones.

**Highlights:** Volume amplification up to 100x, Voice isolation for clearer conversations, Hearing protection features, Background app operation, Simple one-tap amplification, Bluetooth headphone support

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $9.99 | per month |
| Full Access | $49.99 | per year |
| Full Access | $59.99 | per year |
| Full Access | $99.99 | per year |

**What reviewers like**

- ⭐ Excellent sound quality
- 🔊 Effective amplification
- 🎧 Works well with wireless headphones

**What reviewers complain about**

- 💰 Expensive subscription model
- 🔒 Locked behind paywall
- 🔁 Delayed audio playback
- 🚫 Doesn't work with built-in phone speakers

**Reported bugs**

- Subscription charges even after cancellation
- Inability to cancel free trial
- Compatibility issues with certain devices

**Requested features**

- Free trial option without payment info
- Ability to use without subscription
- Integration with iOS accessibility features


### Citation Mapper

[App page](https://appshunter.io/ios/app/citation-mapper/id6759833224)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Monthly | $24.99 | one-time |
| Premium Monthly | $49.99 | one-time |
| Enterprise Monthly | $99.99 | one-time |
| Professional Yearly | $239.99 | one-time |
| Premium Yearly | $479.99 | one-time |
| Enterprise Yearly | $959.99 | one-time |


## Frequently asked questions

### Is Sound Amplifier free?

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

### Is Citation Mapper free?

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

### Do Sound Amplifier or Citation Mapper have ads?

Neither Sound Amplifier nor Citation Mapper shows ads.

### Which is updated more often, Sound Amplifier or Citation Mapper?

Sound Amplifier ships an update every 2 weeks, and Citation Mapper daily. Most recently, Sound Amplifier was updated on October 19, 2026 and Citation Mapper on October 13, 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.*