# Perfume Ratio vs Schlummer

The clearest difference is ads: Perfume Ratio at none against Schlummer's shown. Perfume Ratio also leads on update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Perfume Ratio sells 3 one-off in-app purchases and Schlummer sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Perfume Ratio ships an update every 5 days, Schlummer every 3 weeks. Both last shipped on October 14, 2026.

## The numbers

| Metric | Perfume Ratio | Schlummer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 1 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [守信 尚](https://appshunter.io/developer/1889197777) | [Levin David Schwab](https://appshunter.io/developer/1896432297) |

## What reviewers say

### Perfume Ratio

[App page](https://appshunter.io/ios/app/perfume-ratio/id6771569582)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |


### Schlummer

[App page](https://appshunter.io/ios/app/schlummer-sleep-tracker/id6783421618)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Schlummer Pro Monthly | $3.99 | per month |
| Schlummer Pro Yearly | $24.99 | per year |
| Schlummer Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Perfume Ratio free?

Perfume Ratio is free to download, with in-app purchases available.

### Is Schlummer free?

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

### Do Perfume Ratio or Schlummer have ads?

Schlummer shows ads; Perfume Ratio does not.

### Which is updated more often, Perfume Ratio or Schlummer?

Perfume Ratio ships an update every 5 days, and Schlummer every 3 weeks. Most recently, Perfume Ratio was updated on October 14, 2026 and Schlummer on October 14, 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.*