# Smart 2do vs Chaos Contacts

The clearest difference is iOS requirement: Chaos Contacts at 17.0 against Smart 2do's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Smart 2do ships an update every 6 days, Chaos Contacts every 8 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Smart 2do | Chaos Contacts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/chaos-contacts/id6784129170/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 8 days |
| Monetization | — | Free |
| Size | 4 MB | 2 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SOURABH MAZUMDER](https://appshunter.io/developer/1874851493) | [Chaos Software Group, Inc.](https://appshunter.io/developer/894156724) |

## What reviewers say

### Smart 2do

[App page](https://appshunter.io/ios/app/smart-2do/id6758761425)

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

**In-app purchases:** none


### Chaos Contacts

[App page](https://appshunter.io/ios/app/chaos-contacts/id6784129170)

This app syncs your Windows PC contacts to your iPhone and iPad, maintaining a separate, private database. It offers filtering, linking with other productivity apps, and import/export capabilities.

**Highlights:** Syncs Windows PC contacts to iOS, Independent contact database for privacy, Filter contacts by groups, Link events and tasks to contacts, Import and share contacts

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart 2do free?

Smart 2do is free to download, with no in-app purchases.

### Is Chaos Contacts free?

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

### Do Smart 2do or Chaos Contacts have ads?

Neither Smart 2do nor Chaos Contacts shows ads.

### Which is updated more often, Smart 2do or Chaos Contacts?

Smart 2do ships an update every 6 days, and Chaos Contacts every 8 days. Most recently, Smart 2do was updated on November 9, 2026 and Chaos Contacts on November 10, 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.*