# CA Auth ID vs SMART Union

The clearest difference is rating: SMART Union at 3.3 against CA Auth ID's 1.0. SMART Union also leads on review sentiment (29% vs 5%) and ratings volume (28 vs 3). CA Auth ID's advantage is iOS requirement (8.0 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.

SMART Union holds the better App Store score, 3.3 against 1.0. That said, the two scores are not equally well evidenced: SMART Union has 28 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 5% of CA Auth ID's written reviews are positive against 29% of SMART Union's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | CA Auth ID | SMART Union |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/ca-auth-id/id325848930/reviews) | **[3.3 (28 ratings)](https://appshunter.io/ios/app/smart-union/id996490914/reviews)** |
| Number of ratings | 3 | **28** |
| Positive reviews | 5.3% of reviews | **28.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 6 MB | 165 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CA, Inc](https://appshunter.io/developer/400519643) | [International Association of Sheet Metal, Air, Rail and Transportation Workers](https://appshunter.io/developer/1400949744) |

## What reviewers say

### CA Auth ID

[App page](https://appshunter.io/ios/app/ca-auth-id/id325848930)

Enhance online security with two-factor authentication using your iPhone. This app generates unique identification certificates for secure logins to websites and networks, protecting your accounts from unauthorized access.

**Highlights:** Two-factor strong authentication, Generates identification certificates, Securely accesses online banking, Protects corporate VPNs, PKI-based cryptographic keys

**Features:** macOS Compatibility

**In-app purchases:** none


### SMART Union

[App page](https://appshunter.io/ios/app/smart-union/id996490914)

Stay informed with union news and important notifications. Access member benefits, local union information, and resources to manage your meeting experience with schedules and maps.

**Highlights:** Union news updates, Important notifications, Member benefits access, Local union information, Meeting schedules and maps, Member resources

**In-app purchases:** none


## Frequently asked questions

### Is CA Auth ID free?

CA Auth ID is free to download, with no in-app purchases.

### Is SMART Union free?

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

### Which has better reviews, CA Auth ID or SMART Union?

SMART Union is rated higher. CA Auth ID averages 1.0 out of 5 from 3 ratings, while SMART Union averages 3.3 from 28 ratings.

### Do CA Auth ID or SMART Union have ads?

Neither CA Auth ID nor SMART Union shows ads.

### Which is updated more often, CA Auth ID or SMART Union?

CA Auth ID ships an update every 2 months, and SMART Union every 2 months. Most recently, CA Auth ID was updated on September 19, 2026 and SMART Union on September 28, 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.*