# SWS IoT vs Invoice Maker

The clearest difference is in-app purchases: SWS IoT at none against Invoice Maker's 2. SWS IoT also leads on iOS requirement (12.0 vs 15.0). Invoice Maker's advantage is update cadence (every 5 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Invoice Maker sells 2 in-app purchases, starting at $19.00 per month. SWS IoT asks for nothing beyond the download.

SWS IoT ships an update every 3 months, Invoice Maker every 5 weeks. The most recent releases landed on October 27, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SWS IoT | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Size | 39 MB | 39 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Simplyworks Solutions Limited](https://appshunter.io/developer/1721465366) | [Caractiv Tech](https://appshunter.io/developer/1712980218) |

## What reviewers say

### SWS IoT

[App page](https://appshunter.io/ios/app/sws-iot/id6474379047)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-estimate-bill/id6756495015)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership Monthly | $19.00 | per month |
| Premium Membership Annually | $199.00 | per year |


## Frequently asked questions

### Is SWS IoT free?

SWS IoT 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 SWS IoT or Invoice Maker have ads?

Neither SWS IoT nor Invoice Maker shows ads.

### Which is updated more often, SWS IoT or Invoice Maker?

SWS IoT ships an update every 3 months, and Invoice Maker every 5 weeks. Most recently, SWS IoT was updated on October 27, 2026 and Invoice Maker on October 17, 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.*