# SSK (ССК) vs Smart Invoice Maker Pro

The clearest difference is update cadence: Smart Invoice Maker Pro at every 3 days against SSK (ССК)'s every 6 weeks. SSK (ССК)'s advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SSK (ССК) ships an update every 6 weeks, Smart Invoice Maker Pro every 3 days. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | SSK (ССК) | Smart Invoice Maker Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Size | 39 MB | 29 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ТОО "Центр устойчивого развития столицы"](https://appshunter.io/developer/941383649) | [MBDTECH LTD](https://appshunter.io/developer/1817225204) |

## What reviewers say

### SSK (ССК)

[App page](https://appshunter.io/ios/app/ssk/id6443502872)

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

**In-app purchases:** none


### Smart Invoice Maker Pro

[App page](https://appshunter.io/ios/app/smart-invoice-maker-pro/id6755522995)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SSK (ССК) free?

SSK (ССК) is free to download, with no in-app purchases.

### Is Smart Invoice Maker Pro free?

Smart Invoice Maker Pro is free to download, with no in-app purchases.

### Do SSK (ССК) or Smart Invoice Maker Pro have ads?

Neither SSK (ССК) nor Smart Invoice Maker Pro shows ads.

### Which is updated more often, SSK (ССК) or Smart Invoice Maker Pro?

SSK (ССК) ships an update every 6 weeks, and Smart Invoice Maker Pro every 3 days. Most recently, SSK (ССК) was updated on September 21, 2026 and Smart Invoice Maker Pro on October 2, 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.*