# Sound Machine for Deep Sleep vs Diary Star

The clearest difference is update cadence: Sound Machine for Deep Sleep at every 11 days against Diary Star's monthly. Sound Machine for Deep Sleep also leads on device support (3 vs 1) and iOS requirement (9.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Sound Machine for Deep Sleep sells 1 in-app purchase, starting at $4.99 per month and Diary Star sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sound Machine for Deep Sleep ships an update every 11 days, Diary Star monthly. The most recent releases landed on October 20, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Sound Machine for Deep Sleep | Diary Star |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (61 ratings)](https://appshunter.io/ios/app/sound-machine-for-deep-sleep/id1217345846/reviews)** | — |
| Number of ratings | **61** | — |
| Positive reviews | 95.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 119 MB | 8 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aaditya Garg](https://appshunter.io/developer/823461462) | [Chengdu Xingguan Technology Co., Ltd.](https://appshunter.io/developer/998279524) |

## What reviewers say

### Sound Machine for Deep Sleep

[App page](https://appshunter.io/ios/app/sound-machine-for-deep-sleep/id1217345846)

This app provides a variety of ambient sounds and white noise to help users relax, focus, and cure insomnia. It offers customizable sound mixes, timers, and alarms, and can be used offline. Users can also access a blog for sleep hygiene information.

**Highlights:** Customizable sound mixes, Sleep and focus aid, Offline functionality, Gradual fade timers and alarms, Bedside clock, Sleep hygiene blog

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $4.99 | per month |

**What reviewers like**

- 😴 Highly effective for sleep and insomnia relief
- 🎵 Wide variety of high-quality, realistic sounds
- 🎚️ Ability to mix and combine multiple sounds
- 💾 Custom sound presets can be saved
- 🆓 Excellent free sound options available

**What reviewers complain about**

- 🔐 Limited sounds available without paid subscription
- 💰 Paywall for premium sounds
- 🐛 Subscription issues causing loss of access despite payment
- ⚠️ Sound quality can be inconsistent
- 🎁 Free trial reward system not working as advertised

**Reported bugs**

- Subscription lapses incorrectly reverting paid users to free version
- Free trial reward sounds not unlocking after rating app
- Sound quality inconsistencies

**Requested features**

- Guided sleep meditation with spoken narration
- More sound variety and options
- Removal or reduction of trial-based paywalls
- Better integration with audio streaming services


### Diary Star

[App page](https://appshunter.io/ios/app/diary-star/id6448612043)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |


## Frequently asked questions

### Is Sound Machine for Deep Sleep free?

Sound Machine for Deep Sleep is free to download, with in-app purchases available.

### Is Diary Star free?

Diary Star is free to download, with in-app purchases available.

### Do Sound Machine for Deep Sleep or Diary Star have ads?

Neither Sound Machine for Deep Sleep nor Diary Star shows ads.

### Which is updated more often, Sound Machine for Deep Sleep or Diary Star?

Sound Machine for Deep Sleep ships an update every 11 days, and Diary Star monthly. Most recently, Sound Machine for Deep Sleep was updated on October 20, 2026 and Diary Star on October 29, 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.*