# Chữ ký số Hilo vs SDLINK

The clearest difference is update cadence: SDLINK at daily against Chữ ký số Hilo's every 5 days. Chữ ký số Hilo's advantage is iOS requirement (13.0 vs 15.1). 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.

Chữ ký số Hilo ships an update every 5 days, SDLINK daily. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Chữ ký số Hilo | SDLINK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Size | 90 MB | 136 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Giang Hoang](https://appshunter.io/developer/1548256595) | [Giang Hoang](https://appshunter.io/developer/1548256595) |

## What reviewers say

### Chữ ký số Hilo

[App page](https://appshunter.io/ios/app/chu-ky-so-hilo/id6754372196)

**Features:** macOS Compatibility

**In-app purchases:** none


### SDLINK

[App page](https://appshunter.io/ios/app/sdlink/id6809364893)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chữ ký số Hilo free?

Chữ ký số Hilo is free to download, with no in-app purchases.

### Is SDLINK free?

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

### Do Chữ ký số Hilo or SDLINK have ads?

Neither Chữ ký số Hilo nor SDLINK shows ads.

### Which is updated more often, Chữ ký số Hilo or SDLINK?

Chữ ký số Hilo ships an update every 5 days, and SDLINK daily. Most recently, Chữ ký số Hilo was updated on November 5, 2026 and SDLINK on October 31, 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.*