# Thần Đèn vs NDA Key

The clearest difference is review sentiment: NDA Key at 100% against Thần Đèn's 50%. NDA Key also leads on update cadence (every 3 weeks vs every 2 months). Thần Đèn's advantage is iOS requirement (9.2 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Thần Đèn ships an update every 2 months, NDA Key every 3 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Thần Đèn | NDA Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/than-en/id1406207027/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 35 MB | 45 MB |
| Requires iOS | **9.2** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Viettel Telecom](https://appshunter.io/developer/365850426) | [PILA GROUP JOINT STOCK COMPANY](https://appshunter.io/developer/1815759763) |

## What reviewers say

### Thần Đèn

[App page](https://appshunter.io/ios/app/than-en/id1406207027)

This virtual assistant app offers a range of useful features, including weather forecasts, lottery results, cryptocurrency prices, and simple calculations. It aims to provide quick access to information and perform basic tasks.

**Highlights:** Weather forecasts, Lottery results, Cryptocurrency prices (Bitcoin, Ethereum), Simple calculations, Virtual assistant

**Features:** macOS Compatibility

**In-app purchases:** none


### NDA Key

[App page](https://appshunter.io/ios/app/nda-key/id6475366901)

Manage your personal information securely and easily. Control how your data is shared and maintain your digital identity with a decentralized identifier wallet. Ensures data integrity and compliance with government regulations.

**Highlights:** Personal information management, Sharing control, Decentralized Identifier (DID) wallet, Digital identity creation and management, Data integrity and interoperability, Government compliance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thần Đèn free?

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

### Is NDA Key free?

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

### Do Thần Đèn or NDA Key have ads?

Neither Thần Đèn nor NDA Key shows ads.

### Which is updated more often, Thần Đèn or NDA Key?

Thần Đèn ships an update every 2 months, and NDA Key every 3 weeks. Most recently, Thần Đèn was updated on October 24, 2026 and NDA Key on October 13, 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.*