# MS Shuttle vs Sd2 Voice Amplifier App

The clearest difference is update cadence: MS Shuttle at every 6 weeks against Sd2 Voice Amplifier App's every 32 months. MS Shuttle also leads on iOS requirement (11.0 vs 13.1). On price, ads, 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.

MS Shuttle ships an update every 6 weeks, Sd2 Voice Amplifier App every 32 months. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | MS Shuttle | Sd2 Voice Amplifier App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sd2-voice-amplifier-app/id1613578391/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 32 months |
| Monetization | — | Free |
| Size | 30 MB | 1 MB |
| Requires iOS | **11.0** | 13.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DPV Transportation](https://appshunter.io/developer/1289337675) | [Transport Financial Services, LLC](https://appshunter.io/developer/1613578393) |

## What reviewers say

### MS Shuttle

[App page](https://appshunter.io/ios/app/ms-shuttle/id1487858850)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sd2 Voice Amplifier App

[App page](https://appshunter.io/ios/app/sd2-voice-amplifier-app/id1613578391)

This utility app enhances your voice, making it clearer and louder, especially when speaking through a mask. It's also useful for public speaking with external speakers or for individuals with medical conditions affecting their vocal volume.

**Highlights:** Reduces muffled mask voice, Amplifies voice for public speaking, Assists individuals with low vocal volume, Clearer and louder speech output

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MS Shuttle free?

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

### Is Sd2 Voice Amplifier App free?

Sd2 Voice Amplifier App is free to download, with no in-app purchases.

### Do MS Shuttle or Sd2 Voice Amplifier App have ads?

Neither MS Shuttle nor Sd2 Voice Amplifier App shows ads.

### Which is updated more often, MS Shuttle or Sd2 Voice Amplifier App?

MS Shuttle ships an update every 6 weeks, and Sd2 Voice Amplifier App every 32 months. Most recently, MS Shuttle was updated on October 12, 2026 and Sd2 Voice Amplifier App on October 1, 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.*