# Smart Site Safety System vs KEL DWSS

The clearest difference is update cadence: KEL DWSS at every 2 weeks against Smart Site Safety System's every 2 months. Smart Site Safety System's advantage is iOS requirement (9.0 vs 12.0). 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.

Smart Site Safety System ships an update every 2 months, KEL DWSS every 2 weeks. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Smart Site Safety System | KEL DWSS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 34 MB | 38 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Synergos Systems Company Limited](https://appshunter.io/developer/1777215731) | [isBIM Limited](https://appshunter.io/developer/411637600) |

## What reviewers say

### Smart Site Safety System

[App page](https://appshunter.io/ios/app/smart-site-safety-system/id6737595459)

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

**In-app purchases:** none


### KEL DWSS

[App page](https://appshunter.io/ios/app/kel-dwss/id6747217763)

**In-app purchases:** none


## Frequently asked questions

### Is Smart Site Safety System free?

Smart Site Safety System is free to download, with no in-app purchases.

### Is KEL DWSS free?

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

### Do Smart Site Safety System or KEL DWSS have ads?

Neither Smart Site Safety System nor KEL DWSS shows ads.

### Which is updated more often, Smart Site Safety System or KEL DWSS?

Smart Site Safety System ships an update every 2 months, and KEL DWSS every 2 weeks. Most recently, Smart Site Safety System was updated on October 13, 2026 and KEL DWSS on September 30, 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.*