# Binary O'Clock vs Retro Notes

The clearest difference is in-app purchases: Binary O'Clock at none against Retro Notes's 4. Binary O'Clock also leads on device support (5 vs 2). Retro Notes's advantage is update cadence (every 8 days vs every 3 weeks) and iOS requirement (18.0 vs 26.0). On price and ads there is nothing between them.

Both are free to download. Retro Notes sells 4 in-app purchases, starting at $0.99 per 7 days. Binary O'Clock asks for nothing beyond the download.

Binary O'Clock ships an update every 3 weeks, Retro Notes every 8 days. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Binary O'Clock | Retro Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 8 MB | 19 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Backslashed](https://appshunter.io/developer/499276703) | [EGE AYBEK](https://appshunter.io/developer/1871937675) |

## What reviewers say

### Binary O'Clock

[App page](https://appshunter.io/ios/app/binary-oclock/id1166356115)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Retro Notes

[App page](https://appshunter.io/ios/app/retro-notes-notetaker/id6758278823)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Annual | $39.99 | per year |


## Frequently asked questions

### Is Binary O'Clock free?

Binary O'Clock is free to download, with no in-app purchases.

### Is Retro Notes free?

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

### Do Binary O'Clock or Retro Notes have ads?

Neither Binary O'Clock nor Retro Notes shows ads.

### Which is updated more often, Binary O'Clock or Retro Notes?

Binary O'Clock ships an update every 3 weeks, and Retro Notes every 8 days. Most recently, Binary O'Clock was updated on October 20, 2026 and Retro Notes on October 28, 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.*