# Smart Invoice vs EAC Smart Duty

The clearest difference is in-app purchases: EAC Smart Duty at none against Smart Invoice's 2. EAC Smart Duty also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Smart Invoice sells 2 in-app purchases, starting at $6.99 per 7 days. EAC Smart Duty asks for nothing beyond the download.

Smart Invoice ships an update every 3 months, EAC Smart Duty every 2 months. Both last shipped on October 4, 2026.

## The numbers

| Metric | Smart Invoice | EAC Smart Duty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/eac-smart-duty/id6479355181/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 63 MB | 51 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [CW Lee](https://appshunter.io/developer/1468639016) | [SYSTEMATIC Business Solution](https://appshunter.io/developer/1500215627) |

## What reviewers say

### Smart Invoice

[App page](https://appshunter.io/ios/app/smart-invoice/id1516600182)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $6.99 | per 7 days |
| Annually Subscription | $69.99 | per year |


### EAC Smart Duty

[App page](https://appshunter.io/ios/app/eac-smart-duty/id6479355181)

Manage employee attendance, leaves, and tasks with this utility app. It also handles duty rosters and payroll processing. Streamline workforce management for businesses.

**Highlights:** Attendance tracking, Leave management, Task assignment, Duty roster, Payroll processing, Fine management

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Invoice free?

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

### Is EAC Smart Duty free?

EAC Smart Duty is free to download, with no in-app purchases.

### Do Smart Invoice or EAC Smart Duty have ads?

Smart Invoice shows ads; EAC Smart Duty does not.

### Which is updated more often, Smart Invoice or EAC Smart Duty?

Smart Invoice ships an update every 3 months, and EAC Smart Duty every 2 months. Most recently, Smart Invoice was updated on October 4, 2026 and EAC Smart Duty on October 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.*