# Sonora Immersive Sound Machine vs lockstar

The clearest difference is in-app purchases: lockstar at none against Sonora Immersive Sound Machine's 4. lockstar also leads on update cadence (daily vs every 4 days). Sonora Immersive Sound Machine's advantage is device support (3 vs 1) and iOS requirement (15.5 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Sonora Immersive Sound Machine sells 4 in-app purchases, starting at $6.99 per month. lockstar asks for nothing beyond the download.

Sonora Immersive Sound Machine ships an update every 4 days, lockstar daily. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Sonora Immersive Sound Machine | lockstar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (517 ratings)](https://appshunter.io/ios/app/sonora-immersive-sound-machine/id6742157763/reviews)** | — |
| Number of ratings | **517** | — |
| Positive reviews | 94.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Monetization | Freemium | — |
| Size | 202 MB | 1 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sonoraa Audio Lab Schucker](https://appshunter.io/developer/1797116799) | [JISU LEE](https://appshunter.io/developer/1864799952) |

## What reviewers say

### Sonora Immersive Sound Machine

[App page](https://appshunter.io/ios/app/sonora-immersive-sound-machine/id6742157763)

Create personalized soundscapes for sleep, focus, and relaxation with studio-grade audio. Mix nature sounds, white noise, and binaural beats with customizable frequency controls and animated visuals. Save favorite mixes for quick access via home screen widgets.

**Highlights:** Customizable soundscape mixing, Premium library of nature sounds, White noise generator with frequency control, Binaural beats and isochronic tones, Animated soundscapes, Home screen widgets for quick access

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $6.99 | per month |
| 3-Month Premium Subscription | $14.99 | per 3 months |
| Annually Premium Subscription | $39.99 | per year |
| Lifetime Premium | $79.99 | one-time |


### lockstar

[App page](https://appshunter.io/ios/app/lockstar/id6758002597)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sonora Immersive Sound Machine free?

Sonora Immersive Sound Machine is free to download, with in-app purchases available.

### Is lockstar free?

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

### Do Sonora Immersive Sound Machine or lockstar have ads?

Neither Sonora Immersive Sound Machine nor lockstar shows ads.

### Which is updated more often, Sonora Immersive Sound Machine or lockstar?

Sonora Immersive Sound Machine ships an update every 4 days, and lockstar daily. Most recently, Sonora Immersive Sound Machine was updated on October 23, 2026 and lockstar on October 19, 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.*