# Noise Machine vs ASPIRE Study

The clearest difference is in-app purchases: ASPIRE Study at none against Noise Machine's 10. ASPIRE Study also leads on ads (none vs shown) and iOS requirement (14.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Noise Machine sells 10 in-app purchases, starting at $0.99 per 7 days. ASPIRE Study asks for nothing beyond the download.

Noise Machine ships an update every 3 weeks, ASPIRE Study monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Noise Machine | ASPIRE Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/noise-machine-brown-white/id1261956119/reviews)** | — |
| Number of ratings | **4.3K** | — |
| Positive reviews | 65.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 119 MB | 73 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Daiser Ltd](https://appshunter.io/developer/1856303142) |

## What reviewers say

### Noise Machine

[App page](https://appshunter.io/ios/app/noise-machine-brown-white/id1261956119)

Drift off to sleep, enhance focus, or simply relax with a variety of scientifically accurate noise types. This app offers brown, green, pink, and white noise, along with a sleep timer and the ability to mix sounds. Control playback with Siri and enjoy a beautiful, dark mode interface.

**Highlights:** High-quality noise generation, Integrated sleep timer, Mix noise with other app audio, Siri integration for playback control, Relaxing dark mode, Play on various audio devices

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $0.99 | per 7 days |
| Unlimited Access | $8.99 | per 7 days |
| Unlimited Noise Subscription | $9.99 | per year |
| Unlimited Noise | $12.99 | per year |
| Unlimited Noise | $14.99 | per year |
| Unlimited Noise | $19.99 | per year |
| Full Access | $19.99 | per month |
| Noise Machine Lifetime Unlock | $0.99 | one-time |
| Noise Machine Lifetime Unlock | $6.99 | one-time |
| Noise Machine Lifetime Unlock | $9.99 | one-time |

**What reviewers like**

- 🚀 Great for sleep
- 🚀 Helps block out noise
- 👍 Simple and easy to use
- 👍 Variety of sound options
- 👍 Useful for travel and home

**What reviewers complain about**

- 🐛 Constant pop-up for rating
- 🐛 Requires internet connection
- 🔋 High battery consumption
- 💰 Subscription model is expensive

**Reported bugs**

- App crashes or stops playing randomly
- Skipping or looping issues with sound

**Requested features**

- More sound options (purple, blue noise)
- Ability to mix/layer sounds
- Longer timer options (e.g. 30 mins)
- Ability to cast to other devices


### ASPIRE Study

[App page](https://appshunter.io/ios/app/aspire-study/id6762404950)

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

**In-app purchases:** none


## Frequently asked questions

### Is Noise Machine free?

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

### Is ASPIRE Study free?

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

### Do Noise Machine or ASPIRE Study have ads?

Noise Machine shows ads; ASPIRE Study does not.

### Which is updated more often, Noise Machine or ASPIRE Study?

Noise Machine ships an update every 3 weeks, and ASPIRE Study monthly. Most recently, Noise Machine was updated on November 2, 2026 and ASPIRE Study on October 31, 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.*