# VietLock vs Duc Thinh GPS

The clearest difference is update cadence: VietLock at every 8 days against Duc Thinh GPS's every 3 weeks. VietLock also leads on iOS requirement (13.0 vs 17.0). 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.

VietLock ships an update every 8 days, Duc Thinh GPS every 3 weeks. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | VietLock | Duc Thinh GPS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Size | 129 MB | 214 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Phu Nguyen](https://appshunter.io/developer/1773006125) | [Nhu Le Minh](https://appshunter.io/developer/1846249616) |

## What reviewers say

### VietLock

[App page](https://appshunter.io/ios/app/vietlock/id1473096732)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duc Thinh GPS

[App page](https://appshunter.io/ios/app/duc-thinh-gps/id1546529881)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is VietLock free?

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

### Is Duc Thinh GPS free?

Duc Thinh GPS is free to download, with no in-app purchases.

### Do VietLock or Duc Thinh GPS have ads?

Neither VietLock nor Duc Thinh GPS shows ads.

### Which is updated more often, VietLock or Duc Thinh GPS?

VietLock ships an update every 8 days, and Duc Thinh GPS every 3 weeks. Most recently, VietLock was updated on September 8, 2026 and Duc Thinh GPS on September 20, 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.*