# Krub.ai vs AI Invoice Maker

The clearest difference is in-app purchases: Krub.ai at none against AI Invoice Maker's 2. Krub.ai also leads on update cadence (weekly vs every 2 months). AI Invoice Maker's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. AI Invoice Maker sells 2 in-app purchases, starting at $14.99 per month. Krub.ai asks for nothing beyond the download.

Krub.ai ships an update weekly, AI Invoice Maker every 2 months. The most recent releases landed on September 8, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Krub.ai | AI Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 68 MB | 83 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [SeeBiz Inc.](https://appshunter.io/developer/1637430432) | [Focuslabs LLC](https://appshunter.io/developer/1816666107) |

## What reviewers say

### Krub.ai

[App page](https://appshunter.io/ios/app/krubai/id6747217722)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### AI Invoice Maker

[App page](https://appshunter.io/ios/app/ai-invoice-maker-servifocus/id6749580848)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $14.99 | per month |
| Yearly | $69.99 | per year |


## Frequently asked questions

### Is Krub.ai free?

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

### Is AI Invoice Maker free?

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

### Do Krub.ai or AI Invoice Maker have ads?

Neither Krub.ai nor AI Invoice Maker shows ads.

### Which is updated more often, Krub.ai or AI Invoice Maker?

Krub.ai ships an update weekly, and AI Invoice Maker every 2 months. Most recently, Krub.ai was updated on September 8, 2026 and AI Invoice Maker on September 16, 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.*