# PreventivOk vs Invoice Generator

PreventivOk and Invoice Generator are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. PreventivOk sells 2 in-app purchases, starting at $2.99 per month and Invoice Generator sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 12, 2026.

## The numbers

| Metric | PreventivOk | Invoice Generator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Size | 45 MB | 56 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Augello](https://appshunter.io/developer/1844412810) | [Constantin Ginga](https://appshunter.io/developer/1835403346) |

## What reviewers say

### PreventivOk

[App page](https://appshunter.io/ios/app/preventivok/id6753686989)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced | $2.99 | per month |
| Premium | $4.99 | per month |


### Invoice Generator

[App page](https://appshunter.io/ios/app/invoice-generator-easy-maker/id6757959227)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Yearly | $64.99 | per year |
| Premium Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is PreventivOk free?

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

### Is Invoice Generator free?

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

### Do PreventivOk or Invoice Generator have ads?

Neither PreventivOk nor Invoice Generator shows ads.

### Which is updated more often, PreventivOk or Invoice Generator?

PreventivOk ships an update fortnightly, and Invoice Generator fortnightly. Most recently, PreventivOk was updated on October 12, 2026 and Invoice Generator on October 12, 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.*