# Coating OS vs Arez AI

The clearest difference is in-app purchases: Coating OS at none against Arez AI's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Arez AI sells 3 in-app purchases, starting at $79.00 per month. Coating OS asks for nothing beyond the download.

Coating OS ships an update every 11 days, Arez AI every 2 weeks. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Coating OS | Arez AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/arez-ai/id6763435291/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 weeks |
| Monetization | — | Subscription |
| Size | 120 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jackson Stephenson](https://appshunter.io/developer/1750033151) | [GERARDO MARTINEZ GOMEZ](https://appshunter.io/developer/1895313242) |

## What reviewers say

### Coating OS

[App page](https://appshunter.io/ios/app/coating-os/id6758826079)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


### Arez AI

[App page](https://appshunter.io/ios/app/arez-ai/id6763435291)

Streamline your contracting business with AI-powered estimates and project management. Generate detailed quotes from text, photos, or blueprints, send professional proposals, and track jobs from bid to paid. Optimize your workflow and close deals faster.

**Highlights:** AI-powered estimates from text, photos, or blueprints, Customizable pricing and supplier pricebooks, Electronic signature proposals, End-to-end project management dashboard, AI renovation previews, Invoicing and job costing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter | $79.00 | per month |
| Professional | $159.00 | per month |
| Agency | $259.00 | per month |


## Frequently asked questions

### Is Coating OS free?

Coating OS is free to download, with no in-app purchases.

### Is Arez AI free?

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

### Do Coating OS or Arez AI have ads?

Neither Coating OS nor Arez AI shows ads.

### Which is updated more often, Coating OS or Arez AI?

Coating OS ships an update every 11 days, and Arez AI every 2 weeks. Most recently, Coating OS was updated on October 11, 2026 and Arez AI on October 8, 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.*