# IOU vs SiteBoard

The clearest difference is ads: SiteBoard at none against IOU's shown. IOU's advantage is monetization model (ad-supported vs free with in-app purchases) and ratings volume (8 vs 1). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. IOU sells 1 in-app purchase, starting at $9.99 per month and SiteBoard sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for IOU against 5.0 for SiteBoard. That said, the two scores are not equally well evidenced: IOU has 8 ratings behind it against 1, so its average is the more settled of the two.

IOU ships an update every 5 days, SiteBoard every 3 days. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | IOU | SiteBoard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/iou-marker/id6746040680/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/siteboard/id6811742002/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 149 MB | 2 MB |
| Requires iOS | 18.4 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [IOU Marker](https://appshunter.io/developer/1814814238) | [Cameron Walker](https://appshunter.io/developer/6811742004) |

## What reviewers say

### IOU

[App page](https://appshunter.io/ios/app/iou-marker/id6746040680)

Create professional agreements and manage payments effortlessly. Draft documents using AI, e-sign, and track invoices and due dates in one organized platform. Secure sign-in ensures your data is protected.

**Highlights:** AI-powered agreement drafting, E-signature functionality, Payment and invoice management, Due date reminders, Dispute tracking, Secure sign-in

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IOU Pro | $9.99 | per month |


### SiteBoard

[App page](https://appshunter.io/ios/app/siteboard/id6811742002)

This app helps contractors manage job sites by organizing projects, tracking locations, and saving project photos. It simplifies task management and deadlines to keep projects running smoothly.

**Highlights:** Job management, Job locations tracking, Project dates management, Task lists organization, Project photo saving

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SiteBoard | $4.99 | per month |
| SiteBoard | $9.99 | per month |


## Frequently asked questions

### Is IOU free?

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

### Is SiteBoard free?

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

### Which has better reviews, IOU or SiteBoard?

IOU and SiteBoard are both rated 5.0 out of 5 on the App Store, from 8 and 1 ratings respectively.

### Do IOU or SiteBoard have ads?

IOU shows ads; SiteBoard does not.

### Which is updated more often, IOU or SiteBoard?

IOU ships an update every 5 days, and SiteBoard every 3 days. Most recently, IOU was updated on October 14, 2026 and SiteBoard on October 19, 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.*