# 복리계산 vs FaxExtension

The clearest difference is ads: FaxExtension at none against 복리계산's shown. 복리계산's advantage is update cadence (every 4 days vs every 12 months) and iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 복리계산 sells 1 one-off in-app purchase and FaxExtension sells 10 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

복리계산 ships an update every 4 days, FaxExtension every 12 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | 복리계산 | FaxExtension |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 12 months |
| Size | 49 MB | 0 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HYUNWOO LEE](https://appshunter.io/developer/1592216709) | [Solutium](https://appshunter.io/developer/1758055043) |

## What reviewers say

### 복리계산

[App page](https://appshunter.io/ios/app/id6504154689)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all ads | $9.99 | one-time |


### FaxExtension

[App page](https://appshunter.io/ios/app/faxextension/id6553987066)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Fax Service | $8.99 | per 7 days |
| Monthly Fax Service | $12.99 | per month |
| Yearly Fax Service | $179.00 | per year |
| Receive up to 100 fax pages | $7.99 | one-time |
| Receive up to 250 fax pages | $12.99 | one-time |
| Send up to 25 fax pages | $24.99 | one-time |
| Send up to 100 fax pages | $69.99 | one-time |
| Send up to 250 fax pages | $149.00 | one-time |
| Send up to 500 fax pages | $259.00 | one-time |
| Send up to 1000 fax pages | $399.00 | one-time |


## Frequently asked questions

### Is 복리계산 free?

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

### Is FaxExtension free?

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

### Do 복리계산 or FaxExtension have ads?

복리계산 shows ads; FaxExtension does not.

### Which is updated more often, 복리계산 or FaxExtension?

복리계산 ships an update every 4 days, and FaxExtension every 12 months. Most recently, 복리계산 was updated on November 4, 2026 and FaxExtension on November 4, 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.*