# SPHERE OS vs Learn Acoustics Engineering

The clearest difference is price: SPHERE OS at Free against Learn Acoustics Engineering's $1.99. SPHERE OS also leads on update cadence (every 3 weeks vs every 31 months). Learn Acoustics Engineering's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

SPHERE OS is free to download; Learn Acoustics Engineering costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SPHERE OS ships an update every 3 weeks, Learn Acoustics Engineering every 31 months. The most recent releases landed on September 9, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | SPHERE OS | Learn Acoustics Engineering |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/sphere-os/id1579848717/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 31 months |
| Monetization | Free | — |
| Size | 951 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LNSOFT](https://appshunter.io/developer/1137904140) | [Muhammad Umair](https://appshunter.io/developer/1696049320) |

## What reviewers say

### SPHERE OS

[App page](https://appshunter.io/ios/app/sphere-os/id1579848717)

Explore Earth's dynamic systems with an interactive digital globe. Visualize real-time data like cloud cover, seismic activity, and pollution, and engage through voice commands, gestures, and augmented reality. This tool transforms learning about our planet for educational and exhibition purposes.

**Highlights:** Real-time scientific data visualization, Voice recognition for navigation, Gesture-based globe control, Augmented Reality (AR) mode, QR code content integration, Customizable playlists for presentations

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn Acoustics Engineering

[App page](https://appshunter.io/ios/app/learn-acoustics-engineering/id6451270819)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SPHERE OS free?

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

### Is Learn Acoustics Engineering free?

Learn Acoustics Engineering costs $1.99, with no in-app purchases.

### Do SPHERE OS or Learn Acoustics Engineering have ads?

Neither SPHERE OS nor Learn Acoustics Engineering shows ads.

### Which is updated more often, SPHERE OS or Learn Acoustics Engineering?

SPHERE OS ships an update every 3 weeks, and Learn Acoustics Engineering every 31 months. Most recently, SPHERE OS was updated on September 9, 2026 and Learn Acoustics Engineering on September 7, 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.*