# Clean Is Mandatory Studio vs Invoice App by Invoice Maker

The clearest difference is in-app purchases: Clean Is Mandatory Studio at none against Invoice App by Invoice Maker's 5. Clean Is Mandatory Studio also leads on ratings volume (7 vs 1) and iOS requirement (12.0 vs 15.0). Invoice App by Invoice Maker's advantage is update cadence (every 11 days vs every 6 months). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Invoice App by Invoice Maker sells 5 in-app purchases, starting at $12.00 per month. Clean Is Mandatory Studio asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Clean Is Mandatory Studio against 5.0 for Invoice App by Invoice Maker. That said, the two scores are not equally well evidenced: Clean Is Mandatory Studio has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Clean Is Mandatory Studio ships an update every 6 months, Invoice App by Invoice Maker every 11 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Clean Is Mandatory Studio | Invoice App by Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/clean-is-mandatory-studio/id827640456/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/invoice-app-by-invoice-maker/id6784695284/reviews) |
| Number of ratings | **7** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 11 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 30 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RALPH FEVRIER](https://appshunter.io/developer/1487378138) | [Invoice Maker](https://appshunter.io/developer/1541231918) |

## What reviewers say

### Clean Is Mandatory Studio

[App page](https://appshunter.io/ios/app/clean-is-mandatory-studio/id827640456)

This app simplifies appointment booking, allowing users to find and schedule services 24/7. It offers instant booking, appointment reminders, and easy rescheduling options to manage your schedule efficiently.

**Highlights:** 24/7 appointment booking, Instant booking with providers, Appointment reminders, Easy rescheduling and editing, Manage appointments on-the-fly

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice App by Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-app-by-invoice-maker/id6784695284)

Create professional invoices quickly and easily. This app helps freelancers and small businesses generate clear billing documents, track payments, and maintain organized financial records. Streamline your billing process and get paid faster.

**Highlights:** Create professional invoices in minutes, Add client, product, and service details, Calculate taxes, discounts, and totals, Add payment terms and due dates, Preview and share invoices as PDFs, Organize billing details

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Essentials Monthly | $12.00 | per month |
| Complete Monthly | $24.00 | per month |
| Essentials Yearly | $100.00 | per year |
| Complete Yearly | $200.00 | per year |
| Complete Yearly – Special Offer | $200.00 | per year |


## Frequently asked questions

### Is Clean Is Mandatory Studio free?

Clean Is Mandatory Studio is free to download, with no in-app purchases.

### Is Invoice App by Invoice Maker free?

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

### Which has better reviews, Clean Is Mandatory Studio or Invoice App by Invoice Maker?

Clean Is Mandatory Studio and Invoice App by Invoice Maker are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.

### Do Clean Is Mandatory Studio or Invoice App by Invoice Maker have ads?

Neither Clean Is Mandatory Studio nor Invoice App by Invoice Maker shows ads.

### Which is updated more often, Clean Is Mandatory Studio or Invoice App by Invoice Maker?

Clean Is Mandatory Studio ships an update every 6 months, and Invoice App by Invoice Maker every 11 days. Most recently, Clean Is Mandatory Studio was updated on November 1, 2026 and Invoice App by Invoice Maker on November 5, 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.*