# WQS vs Invoice Maker

The clearest difference is in-app purchases: WQS at none against Invoice Maker's 2. WQS also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). Invoice Maker's advantage is update cadence (fortnightly vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Invoice Maker sells 2 in-app purchases, starting at $9.99 per month. WQS asks for nothing beyond the download.

WQS ships an update every 2 months, Invoice Maker fortnightly. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | WQS | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 51 MB | 20 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [WCA USA, Inc.](https://appshunter.io/developer/663038238) | [Sergey FONOV](https://appshunter.io/developer/1077345102) |

## What reviewers say

### WQS

[App page](https://appshunter.io/ios/app/wqs/id6479597449)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-receipt-and-bill/id6824646182)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Yearly Pro | $49.99 | per year |


## Frequently asked questions

### Is WQS free?

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

### Is Invoice Maker free?

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

### Do WQS or Invoice Maker have ads?

Neither WQS nor Invoice Maker shows ads.

### Which is updated more often, WQS or Invoice Maker?

WQS ships an update every 2 months, and Invoice Maker fortnightly. Most recently, WQS was updated on November 4, 2026 and Invoice Maker on November 6, 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.*