# ContactBoss vs ClientWindow

The clearest difference is update cadence: ClientWindow at fortnightly against ContactBoss's every 4 months. ContactBoss's advantage is iOS requirement (13.4 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ContactBoss ships an update every 4 months, ClientWindow fortnightly. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | ContactBoss | ClientWindow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clientwindow/id6446678741/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 19 MB | 15 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Contacts-DB Inc.](https://appshunter.io/developer/1571309912) | [Orange Shark Limited](https://appshunter.io/developer/1579332237) |

## What reviewers say

### ContactBoss

[App page](https://appshunter.io/ios/app/contactboss/id1571309910)

**Features:** macOS Compatibility

**In-app purchases:** none


### ClientWindow

[App page](https://appshunter.io/ios/app/clientwindow/id6446678741)

Streamline customer communication by integrating WhatsApp and other chat messages with the searchability and security of email. Offers professional messaging, in-app chat, and document sharing for enhanced business interactions.

**Highlights:** WhatsApp messaging integration, In-app chat features, Document sharing, Searchable communication history, Enhanced security

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ContactBoss free?

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

### Is ClientWindow free?

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

### Do ContactBoss or ClientWindow have ads?

Neither ContactBoss nor ClientWindow shows ads.

### Which is updated more often, ContactBoss or ClientWindow?

ContactBoss ships an update every 4 months, and ClientWindow fortnightly. Most recently, ContactBoss was updated on September 30, 2026 and ClientWindow on October 5, 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.*