# Work Order Invoice vs Sawin Mobile Inventory

The clearest difference is in-app purchases: Sawin Mobile Inventory at none against Work Order Invoice's 2. Sawin Mobile Inventory also leads on ads (none vs shown) and iOS requirement (9.0 vs 14.0). Work Order Invoice's advantage is update cadence (every 6 months vs every 36 months). On price and device support there is nothing between them.

Both are free to download. Work Order Invoice sells 2 in-app purchases, starting at $0.99 per month. Sawin Mobile Inventory asks for nothing beyond the download.

Work Order Invoice ships an update every 6 months, Sawin Mobile Inventory every 36 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Work Order Invoice | Sawin Mobile Inventory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 36 months |
| Size | 37 MB | 79 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Snappii Corporation](https://appshunter.io/developer/587096976) | [SAWIN Service Automation, Inc](https://appshunter.io/developer/1546774383) |

## What reviewers say

### Work Order Invoice

[App page](https://appshunter.io/ios/app/work-order-invoice/id1144760298)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Annual Subscription | $9.99 | per year |


### Sawin Mobile Inventory

[App page](https://appshunter.io/ios/app/sawin-mobile-inventory/id1546774381)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Work Order Invoice free?

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

### Is Sawin Mobile Inventory free?

Sawin Mobile Inventory is free to download, with no in-app purchases.

### Do Work Order Invoice or Sawin Mobile Inventory have ads?

Work Order Invoice shows ads; Sawin Mobile Inventory does not.

### Which is updated more often, Work Order Invoice or Sawin Mobile Inventory?

Work Order Invoice ships an update every 6 months, and Sawin Mobile Inventory every 36 months. Most recently, Work Order Invoice was updated on October 26, 2026 and Sawin Mobile Inventory on October 27, 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.*