# Stack Investment vs Invoice Maker

The clearest difference is in-app purchases: Stack Investment at none against Invoice Maker's 2. Stack Investment also leads on iOS requirement (18 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Invoice Maker sells 2 in-app purchases, starting at $2.99 per month. Stack Investment asks for nothing beyond the download.

Stack Investment ships an update every 11 days, Invoice Maker every 9 days. The most recent releases landed on September 16, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Stack Investment | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 9 days** |
| Size | 43 MB | 11 MB |
| Requires iOS | **18** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ibrahim Azzam](https://appshunter.io/developer/1846762388) | [Enid Hadaj](https://appshunter.io/developer/1234407733) |

## What reviewers say

### Stack Investment

[App page](https://appshunter.io/ios/app/stack-investment/id6754151114)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-involumo/id6760113404)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $2.99 | per month |
| Pro Version | $9.99 | per year |


## Frequently asked questions

### Is Stack Investment free?

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

### Is Invoice Maker free?

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

### Do Stack Investment or Invoice Maker have ads?

Neither Stack Investment nor Invoice Maker shows ads.

### Which is updated more often, Stack Investment or Invoice Maker?

Stack Investment ships an update every 11 days, and Invoice Maker every 9 days. Most recently, Stack Investment was updated on September 16, 2026 and Invoice Maker on September 14, 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.*