# Interval Timer vs Sleep Noise Machine

The clearest difference is review sentiment: Sleep Noise Machine at 33% against Interval Timer's 0%. Sleep Noise Machine also leads on update cadence (every 4 days vs monthly) and rating (4.6 vs 4.2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Interval Timer sells 3 in-app purchases, starting at $4.99 per 7 days and Sleep Noise Machine sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Sleep Noise Machine holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Sleep Noise Machine has 140 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 0% of Interval Timer's written reviews are positive against 33% of Sleep Noise Machine's.

Interval Timer ships an update monthly, Sleep Noise Machine every 4 days. The most recent releases landed on September 10, 2026 and August 5, 2026 respectively.

## The numbers

| Metric | Interval Timer | Sleep Noise Machine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (10 ratings)](https://appshunter.io/ios/app/interval-timer-hiit-workouts/id6742372753/reviews) | **[4.6 (140 ratings)](https://appshunter.io/ios/app/sleep-noise-machine/id6743419325/reviews)** |
| Number of ratings | 10 | **140** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 31 MB | 41 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lori Nguyen](https://appshunter.io/developer/1872689629) | [Simon Burgess](https://appshunter.io/developer/960547111) |

## What reviewers say

### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer-hiit-workouts/id6742372753)

This advanced interval timer supports HIIT, Tabata, and circuit training with customizable work, rest, and cooldown periods. Stay focused with voice alerts, background operation, and music integration for any fitness routine.

**Highlights:** Customizable workouts, Pre-set & custom intervals, Voice & sound alerts, Music integration, Background operation, Dark & light mode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Timer (weekly) | $4.99 | per 7 days |
| Premium Timer (monthly) | $12.99 | per month |
| Premium Timer (yearly) | $39.99 | per year |


### Sleep Noise Machine

[App page](https://appshunter.io/ios/app/sleep-noise-machine/id6743419325)

Generate high-quality white, pink, brown, and black noise with advanced audio customization. Create the ideal sound environment for sleep, focus, or masking distractions with real-time adjustments and a user-friendly interface.

**Highlights:** High-quality white, pink, brown, black noise, 10-band graphic equalizer, Adjustable high-pass and low-pass filters, Real-time audio spectrum visualization, Timer with auto-stop and fade out, Ear fatigue reduction methods, Customizable user presets

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Weekly With Trial | $3.99 | per 7 days |
| Premium Annual | $19.99 | per year |
| Premium Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Interval Timer free?

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

### Is Sleep Noise Machine free?

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

### Which has better reviews, Interval Timer or Sleep Noise Machine?

Sleep Noise Machine is rated higher. Interval Timer averages 4.2 out of 5 from 10 ratings, while Sleep Noise Machine averages 4.6 from 140 ratings.

### Do Interval Timer or Sleep Noise Machine have ads?

Neither Interval Timer nor Sleep Noise Machine shows ads.

### Which is updated more often, Interval Timer or Sleep Noise Machine?

Interval Timer ships an update monthly, and Sleep Noise Machine every 4 days. Most recently, Interval Timer was updated on September 10, 2026 and Sleep Noise Machine on August 5, 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.*