# PianoStream vs MSE OS

The clearest difference is review sentiment: PianoStream at 94% against MSE OS's 0%. PianoStream also leads on rating (4.8 vs 1.8) and update cadence (every 2 months vs every 29 months). MSE OS's advantage is in-app purchases (none vs 6) and iOS requirement (9.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. PianoStream sells 6 in-app purchases, starting at $9.99 per 7 days. MSE OS asks for nothing beyond the download.

PianoStream holds the better App Store score, 4.8 against 1.8. That said, the two scores are not equally well evidenced: PianoStream has 217 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 94% of PianoStream's written reviews are positive against 0% of MSE OS's.

PianoStream ships an update every 2 months, MSE OS every 29 months. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | PianoStream | MSE OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (217 ratings)](https://appshunter.io/ios/app/pianostream/id1232509288/reviews)** | [1.8 (5 ratings)](https://appshunter.io/ios/app/mse-os-app/id1398770138/reviews) |
| Number of ratings | **217** | 5 |
| Positive reviews | **93.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 29 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#154** | — |
| Size | 39 MB | 27 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [B&T Entertainment Inc](https://appshunter.io/developer/484279008) | [MS Electronics LLC](https://appshunter.io/developer/1398645873) |

## What reviewers say

### PianoStream

[App page](https://appshunter.io/ios/app/pianostream/id1232509288)

**Currently charting:** #154 Top Grossing · Music (US App Store)

Experience high-quality piano performances on your player piano or digital piano. Enjoy curated stations, exclusive artist content, and seamless playback. Upload your own MIDI files and create custom playlists for a personalized musical experience.

**Highlights:** Live concert-quality piano performances, Curated music stations by genre and era, Universal compatibility with digital and analog pianos, Upload personal MIDI files, Create custom playlists, Exclusive artist content

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Trial Weekly | $9.99 | per 7 days |
| Weekly Subscription | $9.99 | per 7 days |
| Premium Trial Monthly | $19.99 | per month |
| Monthly Subscription | $24.99 | per month |
| Yearly Subscription | $179.99 | per year |
| Premium Trial Yearly | $179.99 | per year |

**What reviewers like**

- 👍 Easy setup and use
- 🚀 Seamless Bluetooth/MIDI connectivity
- 💎 Extensive music library with frequent updates
- 🔊 High-quality piano performances
- 💯 Excellent customer support and responsiveness

**What reviewers complain about**

- 🐛 Occasional technical issues with connectivity
- 🔍 Lacking advanced search/filtering features
- 📱 User interface could be more intuitive

**Reported bugs**

- Occasional app crashes or freezes
- Inconsistent behavior when switching between digital and analog modes

**Requested features**

- Ability to create and save custom playlists
- Landscape mode support for better tablet experience
- Expanded audio output options (e.g., integrating with home audio systems)


### MSE OS

[App page](https://appshunter.io/ios/app/mse-os-app/id1398770138)

This application allows users to control the Phasetech OS440 Amplifier. It provides a direct interface for managing amplifier settings and functions.

**Highlights:** Phasetech OS440 Amplifier control, Direct interface, Settings management, Function control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PianoStream free?

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

### Is MSE OS free?

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

### Which has better reviews, PianoStream or MSE OS?

PianoStream is rated higher. PianoStream averages 4.8 out of 5 from 217 ratings, while MSE OS averages 1.8 from 5 ratings.

### Do PianoStream or MSE OS have ads?

Neither PianoStream nor MSE OS shows ads.

### Which is updated more often, PianoStream or MSE OS?

PianoStream ships an update every 2 months, and MSE OS every 29 months. Most recently, PianoStream was updated on November 4, 2026 and MSE OS on November 2, 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.*