# EVE Pro vs Simple Invoice Maker

The clearest difference is in-app purchases: EVE Pro at none against Simple Invoice Maker's 3. EVE Pro also leads on update cadence (monthly vs every 4 months) and iOS requirement (10.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Simple Invoice Maker sells 3 in-app purchases, starting at $3.99 per month. EVE Pro asks for nothing beyond the download.

EVE Pro ships an update monthly, Simple Invoice Maker every 4 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | EVE Pro | Simple Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/eve-pro/id1282939660/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | — |
| Size | 65 MB | 14 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Integrated Scuba Systems, llc](https://appshunter.io/developer/1261742495) | [iComet](https://appshunter.io/developer/408908544) |

## What reviewers say

### EVE Pro

[App page](https://appshunter.io/ios/app/eve-pro/id1282939660)

This application helps teaching professionals manage their tasks, schedules, and student information. It allows for offline access, direct sales integration, and real-time synchronization with a central database. Designed for scuba diving instructors and businesses, it streamlines operations and enhances customer service.

**Highlights:** Task and schedule management, Customer detail management, Class attendance tracking, Offline data access and synchronization, Direct sales and booking integration, Certification tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Invoice Maker

[App page](https://appshunter.io/ios/app/simple-invoice-maker/id6446448566)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| 6 Months Subscription | $19.99 | per 6 months |
| 1 Year Subscription | $39.99 | per year |


## Frequently asked questions

### Is EVE Pro free?

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

### Is Simple Invoice Maker free?

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

### Do EVE Pro or Simple Invoice Maker have ads?

Neither EVE Pro nor Simple Invoice Maker shows ads.

### Which is updated more often, EVE Pro or Simple Invoice Maker?

EVE Pro ships an update monthly, and Simple Invoice Maker every 4 months. Most recently, EVE Pro was updated on October 24, 2026 and Simple Invoice Maker on October 20, 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.*