# Stack Invoice vs Inventory Pro by Heero

Stack Invoice and Inventory Pro by Heero 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. Neither carries in-app purchases, so what you see is what you pay.

Stack Invoice ships an update every 5 days, Inventory Pro by Heero every 9 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Stack Invoice | Inventory Pro by Heero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stack-invoice/id6755344078/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | Free | — |
| Size | 82 MB | 54 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GrayCrest Technologies Limited](https://appshunter.io/developer/1833810707) | [Alpha Applications LLC](https://appshunter.io/developer/1883909991) |

## What reviewers say

### Stack Invoice

[App page](https://appshunter.io/ios/app/stack-invoice/id6755344078)

Manage your business inventory and create professional invoices on the go. Track stock levels, add product details, and generate custom invoices quickly. Share them instantly via email or messaging apps to get paid faster.

**Highlights:** Inventory Management, Real-Time Stock Tracking, Professional Invoice Generation, Client Management, Fast Sharing Options, Offline Support

**Features:** macOS Compatibility

**In-app purchases:** none


### Inventory Pro by Heero

[App page](https://appshunter.io/ios/app/inventory-pro-by-heero/id6760328025)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stack Invoice free?

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

### Is Inventory Pro by Heero free?

Inventory Pro by Heero is free to download, with no in-app purchases.

### Do Stack Invoice or Inventory Pro by Heero have ads?

Neither Stack Invoice nor Inventory Pro by Heero shows ads.

### Which is updated more often, Stack Invoice or Inventory Pro by Heero?

Stack Invoice ships an update every 5 days, and Inventory Pro by Heero every 9 days. Most recently, Stack Invoice was updated on November 12, 2026 and Inventory Pro by Heero on November 9, 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.*