# Saturn Barter App vs Invoice Maker Involea

The clearest difference is in-app purchases: Saturn Barter App at none against Invoice Maker Involea's 2. Saturn Barter App also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (15.0 vs 18.2). On price, ads and device support there is nothing between them.

Both are free to download. Invoice Maker Involea sells 2 in-app purchases, starting at $6.99 per 7 days. Saturn Barter App asks for nothing beyond the download.

Saturn Barter App ships an update weekly, Invoice Maker Involea every 3 weeks. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Saturn Barter App | Invoice Maker Involea |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 25 MB | 16 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KURT BRADLEY](https://appshunter.io/developer/550466509) | [Smart Automation SRL](https://appshunter.io/developer/1822502270) |

## What reviewers say

### Saturn Barter App

[App page](https://appshunter.io/ios/app/saturn-barter-app/id6758918901)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker Involea

[App page](https://appshunter.io/ios/app/invoice-maker-involea/id6778569566)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Involea Weekly | $6.99 | per 7 days |
| Involea Yearly | $49.99 | per year |


## Frequently asked questions

### Is Saturn Barter App free?

Saturn Barter App is free to download, with no in-app purchases.

### Is Invoice Maker Involea free?

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

### Do Saturn Barter App or Invoice Maker Involea have ads?

Neither Saturn Barter App nor Invoice Maker Involea shows ads.

### Which is updated more often, Saturn Barter App or Invoice Maker Involea?

Saturn Barter App ships an update weekly, and Invoice Maker Involea every 3 weeks. Most recently, Saturn Barter App was updated on October 31, 2026 and Invoice Maker Involea on October 25, 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.*