# CellTrust SL2 vs Card4Action

The clearest difference is rating: Card4Action at 5.0 against CellTrust SL2's 3.2. Card4Action also leads on update cadence (every 3 weeks vs every 2 months). CellTrust SL2's advantage is ratings volume (27 vs 1). 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.

Card4Action holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: CellTrust SL2 has 27 ratings behind it against 1, so its average is the more settled of the two.

CellTrust SL2 ships an update every 2 months, Card4Action every 3 weeks. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | CellTrust SL2 | Card4Action |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (27 ratings)](https://appshunter.io/ios/app/celltrust-sl2/id1170300972/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/card4action/id1394349470/reviews)** |
| Number of ratings | **27** | 1 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 130 MB | 72 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CellTrust Corporation](https://appshunter.io/developer/516410103) | [Card4Action AB](https://appshunter.io/developer/1498258029) |

## What reviewers say

### CellTrust SL2

[App page](https://appshunter.io/ios/app/celltrust-sl2/id1170300972)

This app provides a dedicated business number for your mobile device, separating personal and professional communications. It utilizes secure technologies for internal messaging and voice calls, ensuring compliance and eDiscovery readiness for enterprises.

**Highlights:** Assign dedicated Mobile Business Number (MBN), Separate personal and business communications, SecureSMS® and SecureVoice™ technologies, Secure internal communications, eDiscovery and compliance support, BYOD handset compatibility

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

**In-app purchases:** none


### Card4Action

[App page](https://appshunter.io/ios/app/card4action/id1394349470)

Easily share and update contact information through digital profile cards. The app allows for check-ins at locations and meetings, facilitating networking and providing local offers. Create custom cards for different situations and manage contact interactions with notes and actions.

**Highlights:** Digital profile card sharing, Location and meeting check-ins, Real-time contact info updates, Customizable profile cards, Local offer discovery, Contact notes and action tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is CellTrust SL2 free?

CellTrust SL2 is free to download, with no in-app purchases.

### Is Card4Action free?

Card4Action is free to download, with no in-app purchases.

### Which has better reviews, CellTrust SL2 or Card4Action?

Card4Action is rated higher. CellTrust SL2 averages 3.2 out of 5 from 27 ratings, while Card4Action averages 5.0 from 1 ratings.

### Do CellTrust SL2 or Card4Action have ads?

Neither CellTrust SL2 nor Card4Action shows ads.

### Which is updated more often, CellTrust SL2 or Card4Action?

CellTrust SL2 ships an update every 2 months, and Card4Action every 3 weeks. Most recently, CellTrust SL2 was updated on October 24, 2026 and Card4Action on October 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.*