# TrueOrigin vs Công Viên Xanh

The clearest difference is update cadence: Công Viên Xanh at every 3 days against TrueOrigin's monthly. 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.

TrueOrigin ships an update monthly, Công Viên Xanh every 3 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | TrueOrigin | Công Viên Xanh |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free | — |
| Size | 37 MB | 28 MB |
| Requires iOS | 13.0 | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Onyx Viet Nam](https://appshunter.io/developer/1621007684) | [SandboxVN Technoloy JSC](https://appshunter.io/developer/1636815872) |

## What reviewers say

### TrueOrigin

[App page](https://appshunter.io/ios/app/trueorigin/id1576464807)

This app provides a dynamic digital signature solution to authenticate and prevent counterfeiting of stamps. It offers a novel approach to verifying authenticity directly from the source.

**Highlights:** Dynamic digital signatures, Stamp authentication, Counterfeit prevention, Root-level verification

**Features:** macOS Compatibility

**In-app purchases:** none


### Công Viên Xanh

[App page](https://appshunter.io/ios/app/cong-vien-xanh/id6447980470)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TrueOrigin free?

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

### Is Công Viên Xanh free?

Công Viên Xanh is free to download, with no in-app purchases.

### Do TrueOrigin or Công Viên Xanh have ads?

Neither TrueOrigin nor Công Viên Xanh shows ads.

### Which is updated more often, TrueOrigin or Công Viên Xanh?

TrueOrigin ships an update monthly, and Công Viên Xanh every 3 days. Most recently, TrueOrigin was updated on November 3, 2026 and Công Viên Xanh 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.*