# onSleep vs Duovoco

The clearest difference is ads: onSleep at none against Duovoco's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. onSleep sells 2 in-app purchases, starting at $3.99 per month and Duovoco sells 3 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

onSleep ships an update monthly, Duovoco every 4 weeks. The most recent releases landed on September 9, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | onSleep | Duovoco |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 4 weeks** |
| Size | 73 MB | 37 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [appsix](https://appshunter.io/developer/1867625178) | [Duovoco](https://appshunter.io/developer/1895231346) |

## What reviewers say

### onSleep

[App page](https://appshunter.io/ios/app/onsleep-sleep-tracker-and-diary/id6757688486)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| onSleep Pro Monthly Plan | $3.99 | per month |
| onSleep Pro Yearly Plan | $29.99 | per year |


### Duovoco

[App page](https://appshunter.io/ios/app/duovoco/id6763245298)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duovoco Pro Monthly | $11.99 | per month |
| Duovoco Pro Yearly | $87.99 | per year |
| Duovoco Pro Lifetime | $219.00 | one-time |


## Frequently asked questions

### Is onSleep free?

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

### Is Duovoco free?

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

### Do onSleep or Duovoco have ads?

Duovoco shows ads; onSleep does not.

### Which is updated more often, onSleep or Duovoco?

onSleep ships an update monthly, and Duovoco every 4 weeks. Most recently, onSleep was updated on September 9, 2026 and Duovoco on September 17, 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.*