# Sikarin Mobile Digital vs ERG4Thai

The clearest difference is update cadence: ERG4Thai at every 3 months against Sikarin Mobile Digital's every 25 months. ERG4Thai also leads on iOS requirement (13.0 vs 15.1). 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.

Sikarin Mobile Digital ships an update every 25 months, ERG4Thai every 3 months. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Sikarin Mobile Digital | ERG4Thai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 3 months** |
| Size | 46 MB | 86 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +17 |
| Developer | [SIKARIN HAT-YAI HOSPITAL COMPANY LIMITED](https://appshunter.io/developer/1495125941) | [Pollution Control Department, Thailand](https://appshunter.io/developer/966167337) |

## What reviewers say

### Sikarin Mobile Digital

[App page](https://appshunter.io/ios/app/sikarin-mobile-digital/id1495125942)

**Features:** macOS Compatibility

**In-app purchases:** none


### ERG4Thai

[App page](https://appshunter.io/ios/app/erg4thai/id1514892942)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sikarin Mobile Digital free?

Sikarin Mobile Digital is free to download, with no in-app purchases.

### Is ERG4Thai free?

ERG4Thai is free to download, with no in-app purchases.

### Do Sikarin Mobile Digital or ERG4Thai have ads?

Neither Sikarin Mobile Digital nor ERG4Thai shows ads.

### Which is updated more often, Sikarin Mobile Digital or ERG4Thai?

Sikarin Mobile Digital ships an update every 25 months, and ERG4Thai every 3 months. Most recently, Sikarin Mobile Digital was updated on October 26, 2026 and ERG4Thai 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.*