# art.StrongID vs HDI Authenticator

art.StrongID and HDI Authenticator are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

art.StrongID ships an update every 7 months, HDI Authenticator every 4 months. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | art.StrongID | HDI Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Size | 13 MB | 22 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Feelanet Co., Ltd.](https://appshunter.io/developer/1195483590) | [KOREAEXPERT](https://appshunter.io/developer/1161606505) |

## What reviewers say

### art.StrongID

[App page](https://appshunter.io/ios/app/artstrongid/id1498460216)

**Features:** macOS Compatibility

**In-app purchases:** none


### HDI Authenticator

[App page](https://appshunter.io/ios/app/hdi-authenticator/id1642884813)

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

**In-app purchases:** none


## Frequently asked questions

### Is art.StrongID free?

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

### Is HDI Authenticator free?

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

### Do art.StrongID or HDI Authenticator have ads?

Neither art.StrongID nor HDI Authenticator shows ads.

### Which is updated more often, art.StrongID or HDI Authenticator?

art.StrongID ships an update every 7 months, and HDI Authenticator every 4 months. Most recently, art.StrongID was updated on September 26, 2026 and HDI Authenticator on September 25, 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.*