# D vs Sleepillow

The clearest difference is update cadence: Sleepillow at every 8 months against D's every 27 months. Sleepillow also leads on iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

D ships an update every 27 months, Sleepillow every 8 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | D | Sleepillow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 8 months** |
| Size | 14 MB | 135 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yun Kwok Wing](https://appshunter.io/developer/1603030553) | [Hong Kong Playground Association](https://appshunter.io/developer/886115780) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-momo/id1617990805)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleepillow

[App page](https://appshunter.io/ios/app/sleepillow/id6450578586)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is Sleepillow free?

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

### Do D or Sleepillow have ads?

Neither D nor Sleepillow shows ads.

### Which is updated more often, D or Sleepillow?

D ships an update every 27 months, and Sleepillow every 8 months. Most recently, D was updated on November 7, 2026 and Sleepillow on November 7, 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.*