# Interval Clock vs Relax SoundMachine

The clearest difference is rating: Relax SoundMachine at 4.7 against Interval Clock's 3.3. Relax SoundMachine also leads on review sentiment (50% vs 25%) and ratings volume (233 vs 4). Interval Clock's advantage is in-app purchases (none vs 15) and iOS requirement (5.1.1 vs 15.0). On price there is nothing between them.

Both are free to download. Relax SoundMachine sells 14 in-app purchases, starting at $4.99 per 7 days. Interval Clock asks for nothing beyond the download.

Relax SoundMachine holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Relax SoundMachine has 233 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 25% of Interval Clock's written reviews are positive against 50% of Relax SoundMachine's.

## The numbers

| Metric | Interval Clock | Relax SoundMachine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/interval-clock/id961918081/reviews) | **[4.7 (233 ratings)](https://appshunter.io/ios/app/relax-soundmachine-sensity/id1615963035/reviews)** |
| Number of ratings | 4 | **233** |
| Positive reviews | 25.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 203 MB |
| Requires iOS | **5.1.1** | 15.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Adam Dachis](https://appshunter.io/developer/623445098) | [INSP MOBILE LIMITED](https://appshunter.io/developer/1555291529) |

## What reviewers say

### Interval Clock

[App page](https://appshunter.io/ios/app/interval-clock/id961918081)

This app provides a customizable countdown timer for interval training. It alerts users to speed up or slow down, making it suitable for various exercise equipment or audio-only workouts. Users can set their own interval lengths and timers, with the app remembering the last configuration.

**Highlights:** Customizable interval lengths, Countdown timer with alerts, Supports audio-only workouts, Remembers last interval settings, Ideal for stationary bikes and treadmills

**In-app purchases:** none


### Relax SoundMachine

[App page](https://appshunter.io/ios/app/relax-soundmachine-sensity/id1615963035)

This app offers a wide range of ambient sounds and guided meditations to improve sleep, reduce stress, and boost focus. Create custom soundscapes by mixing multiple audio tracks and utilize features like bedtime reminders and motivational quotes to enhance your daily well-being.

**Highlights:** Massive library of ambient sounds, Custom soundscape mixer, Bedtime reminders, Motivational quotes and affirmations, Nature sounds, white noise, and ASMR, Calms children and pets

**Features:** macOS Compatibility

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleep Sounds – 1 Week Access | $4.99 | per 7 days |
| Sleep Sounds - 1 Week + trial | $4.99 | per 7 days |
| Sleep Sounds - 1 Week Access | $7.99 | per 7 days |
| Sleep Sounds – Monthly Access | $9.99 | per month |
| Sleep Sounds – Monthly Access | $9.99 | per month |
| Sleep Sounds – 3 Months Access | $19.99 | per 3 months |
| Get Sleepy: 1 Year Membership | $49.99 | per year |
| Sleep Sounds - 1 Year + trial | $59.99 | per year |
| Sleep Sounds - 1 Year Access | $59.99 | per year |
| Sleep Sounds - 1 Year Access | $59.99 | per year |
| Sleep Sounds - 1 Year + trial | $89.99 | per year |
| Get Sleep: Lifetime Membership | $39.99 | one-time |
| Get Sleep: Lifetime Membership | $49.99 | one-time |
| Get Sleep: Lifetime Membership | $59.99 | one-time |


## Frequently asked questions

### Is Interval Clock free?

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

### Is Relax SoundMachine free?

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

### Which has better reviews, Interval Clock or Relax SoundMachine?

Relax SoundMachine is rated higher. Interval Clock averages 3.3 out of 5 from 4 ratings, while Relax SoundMachine averages 4.7 from 233 ratings.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*