# # Simple Invoice vs 척척노트

The clearest difference is in-app purchases: 척척노트 at none against # Simple Invoice's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. # Simple Invoice sells 2 in-app purchases, starting at $1.99 per month. 척척노트 asks for nothing beyond the download.

# Simple Invoice ships an update every 8 days, 척척노트 every 9 days. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | # Simple Invoice | 척척노트 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 days |
| Size | 48 MB | 50 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YUKI TANAIKE](https://appshunter.io/developer/478558546) | [jaehwan Eom](https://appshunter.io/developer/6805526507) |

## What reviewers say

### # Simple Invoice

[App page](https://appshunter.io/ios/app/simple-invoice/id6761528129)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Invoice Pro (Monthly) | $1.99 | per month |
| Invoice Pro (Annual) | $18.00 | per year |


### 척척노트

[App page](https://appshunter.io/ios/app/id6805526505)

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

**In-app purchases:** none


## Frequently asked questions

### Is # Simple Invoice free?

# Simple Invoice is free to download, with in-app purchases available.

### Is 척척노트 free?

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

### Do # Simple Invoice or 척척노트 have ads?

Neither # Simple Invoice nor 척척노트 shows ads.

### Which is updated more often, # Simple Invoice or 척척노트?

# Simple Invoice ships an update every 8 days, and 척척노트 every 9 days. Most recently, # Simple Invoice was updated on October 18, 2026 and 척척노트 on October 24, 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.*