# Công Viên Xanh vs NDAKey

The clearest difference is update cadence: Công Viên Xanh at every 3 days against NDAKey's monthly. Công Viên Xanh also leads on iOS requirement (13 vs 16.0). 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.

Công Viên Xanh ships an update every 3 days, NDAKey monthly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Công Viên Xanh | NDAKey |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | — | Free |
| Size | 28 MB | 116 MB |
| Requires iOS | **13** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [SandboxVN Technoloy JSC](https://appshunter.io/developer/1636815872) | [PILA GROUP JOINT STOCK COMPANY](https://appshunter.io/developer/1815759763) |

## What reviewers say

### Công Viên Xanh

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

**Features:** macOS Compatibility

**In-app purchases:** none


### NDAKey

[App page](https://appshunter.io/ios/app/ndakey/id6475366901)

Manage your digital identity securely. Store verified credentials on your device and choose exactly what information to share with others. Protect your data with end-to-end encryption and passwordless sign-in.

**Highlights:** Selective information sharing, End-to-end encrypted data transmission, Store digital credentials on device, Passwordless sign-in with passkeys, Receive and manage credentials, Direct sharing via QR code

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

**In-app purchases:** none


## Frequently asked questions

### Is Công Viên Xanh free?

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

### Is NDAKey free?

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

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

Neither Công Viên Xanh nor NDAKey shows ads.

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

Công Viên Xanh ships an update every 3 days, and NDAKey monthly. Most recently, Công Viên Xanh was updated on November 3, 2026 and NDAKey on November 4, 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.*