# ERG4Thai vs QRSgps Tracking

The clearest difference is update cadence: ERG4Thai at every 3 months against QRSgps Tracking's every 17 months. 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.

ERG4Thai ships an update every 3 months, QRSgps Tracking every 17 months. The most recent releases landed on October 27, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | ERG4Thai | QRSgps Tracking |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 17 months |
| Size | 86 MB | 13 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pollution Control Department, Thailand](https://appshunter.io/developer/966167337) | [Thanaboon Ketwongwiriya](https://appshunter.io/developer/1772694065) |

## What reviewers say

### ERG4Thai

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

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

**In-app purchases:** none


### QRSgps Tracking

[App page](https://appshunter.io/ios/app/qrsgps-tracking/id6736620561)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ERG4Thai free?

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

### Is QRSgps Tracking free?

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

### Do ERG4Thai or QRSgps Tracking have ads?

Neither ERG4Thai nor QRSgps Tracking shows ads.

### Which is updated more often, ERG4Thai or QRSgps Tracking?

ERG4Thai ships an update every 3 months, and QRSgps Tracking every 17 months. Most recently, ERG4Thai was updated on October 27, 2026 and QRSgps Tracking on September 14, 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.*