# KATSAN vs Smart World

The clearest difference is review sentiment: Smart World at 60% against KATSAN's 50%. KATSAN's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 16.4). 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.

KATSAN ships an update every 3 weeks, Smart World monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KATSAN | Smart World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (253 ratings)](https://appshunter.io/ios/app/smart-world/id1460747930/reviews)** |
| Number of ratings | — | **253** |
| Positive reviews | 50.0% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 28 MB | 191 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AP (THAILAND) PUBLIC COMPANY LIMITED](https://appshunter.io/developer/1049624952) | [Vaari](https://appshunter.io/developer/1436458677) |

## What reviewers say

### KATSAN

[App page](https://appshunter.io/ios/app/katsan/id1422569805)

This personal guardian app enhances home security using AI and computer vision. It monitors your neighborhood for potential threats and learns your routines to better protect you and your loved ones, even when you're away.

**Highlights:** AI-powered security monitoring, Computer vision software, Personal guardian for loved ones, Neighborhood safety alerts, Learns user routines

**In-app purchases:** none


### Smart World

[App page](https://appshunter.io/ios/app/smart-world/id1460747930)

Manage your entire home buying journey from pre-sale to post-transfer on a single platform. Track project progress, make down payments, and access other convenient features for a seamless experience.

**Highlights:** Pre-sale to after-sale management, Project progress tracking, Down payment processing, Convenient payment features, Single platform access

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KATSAN free?

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

### Is Smart World free?

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

### Do KATSAN or Smart World have ads?

Neither KATSAN nor Smart World shows ads.

### Which is updated more often, KATSAN or Smart World?

KATSAN ships an update every 3 weeks, and Smart World monthly. Most recently, KATSAN was updated on November 2, 2026 and Smart World on November 3, 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.*