# Atom (Site Engineer) vs Kantan App

The clearest difference is update cadence: Atom (Site Engineer) at fortnightly against Kantan App's every 3 months. Kantan App's advantage is iOS requirement (11.0 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.

Atom (Site Engineer) ships an update fortnightly, Kantan App every 3 months. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Atom (Site Engineer) | Kantan App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 51 MB | 29 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saphire Computers Limited](https://appshunter.io/developer/1164805098) | [CCTech Limited](https://appshunter.io/developer/1506959349) |

## What reviewers say

### Atom (Site Engineer)

[App page](https://appshunter.io/ios/app/atom-site-engineer/id6449485838)

**Features:** Vision Pro support

**In-app purchases:** none


### Kantan App

[App page](https://appshunter.io/ios/app/kantan-app/id6471843579)

**In-app purchases:** none


## Frequently asked questions

### Is Atom (Site Engineer) free?

Atom (Site Engineer) is free to download, with no in-app purchases.

### Is Kantan App free?

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

### Do Atom (Site Engineer) or Kantan App have ads?

Neither Atom (Site Engineer) nor Kantan App shows ads.

### Which is updated more often, Atom (Site Engineer) or Kantan App?

Atom (Site Engineer) ships an update fortnightly, and Kantan App every 3 months. Most recently, Atom (Site Engineer) was updated on September 10, 2026 and Kantan App on May 16, 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.*