# VNPT SmartCA vs THIET THACH

The clearest difference is rating: THIET THACH at 5.0 against VNPT SmartCA's 2.1. VNPT SmartCA's advantage is ratings volume (20 vs 1) and iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

THIET THACH holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: VNPT SmartCA has 20 ratings behind it against 1, so its average is the more settled of the two.

VNPT SmartCA ships an update every 4 weeks, THIET THACH monthly. The most recent releases landed on September 12, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | VNPT SmartCA | THIET THACH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (20 ratings)](https://appshunter.io/ios/app/vnpt-smartca/id1540522462/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thiet-thach/id1610695962/reviews)** |
| Number of ratings | **20** | 1 |
| Positive reviews | 44.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 122 MB | 41 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Vietnam Posts and Telecommunications Group](https://appshunter.io/developer/1215567249) | [THIET THACH Group](https://appshunter.io/developer/1610695964) |

## What reviewers say

### VNPT SmartCA

[App page](https://appshunter.io/ios/app/vnpt-smartca/id1540522462)

This app provides a secure and efficient remote digital signing solution, allowing users to manage and execute digital signatures directly from their mobile devices. It offers features like online account registration, unlimited signing capabilities, and transaction tracking for a comprehensive digital signing experience.

**Highlights:** Online account registration with eKYC, Unlimited digital signing, Manage multiple certificates on one device, Online certificate registration and renewal, Sign, receive, and share files, Track digital signing transactions

**In-app purchases:** none


### THIET THACH

[App page](https://appshunter.io/ios/app/thiet-thach/id1610695962)

This app assists first-time homeowners in planning and managing their home construction projects. It offers a library of design templates, practical building experience videos, and a tool to estimate construction costs per square meter. Connect directly with engineers and architects for online consultations and project management.

**Highlights:** Extensive home design template library, Video library for building experience, Self-service home construction cost calculator, Online consultations with engineers and architects, Project management tool for clients and THIET THACH Group

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

**In-app purchases:** none


## Frequently asked questions

### Is VNPT SmartCA free?

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

### Is THIET THACH free?

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

### Which has better reviews, VNPT SmartCA or THIET THACH?

THIET THACH is rated higher. VNPT SmartCA averages 2.1 out of 5 from 20 ratings, while THIET THACH averages 5.0 from 1 ratings.

### Do VNPT SmartCA or THIET THACH have ads?

Neither VNPT SmartCA nor THIET THACH shows ads.

### Which is updated more often, VNPT SmartCA or THIET THACH?

VNPT SmartCA ships an update every 4 weeks, and THIET THACH monthly. Most recently, VNPT SmartCA was updated on September 12, 2026 and THIET THACH on September 26, 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.*