# Redtail CRM vs CellTrust SL2

The clearest difference is review sentiment: Redtail CRM at 71% against CellTrust SL2's 20%. Redtail CRM also leads on rating (4.6 vs 3.2) and update cadence (fortnightly vs every 2 months). CellTrust SL2's advantage is monetization model (free vs free with in-app purchases). 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.

Redtail CRM holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: Redtail CRM has 695 ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 71% of Redtail CRM's written reviews are positive against 20% of CellTrust SL2's.

Redtail CRM ships an update fortnightly, CellTrust SL2 every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Redtail CRM | CellTrust SL2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (695 ratings)](https://appshunter.io/ios/app/redtail-crm/id1088069067/reviews)** | [3.2 (27 ratings)](https://appshunter.io/ios/app/celltrust-sl2/id1170300972/reviews) |
| Number of ratings | **695** | 27 |
| Positive reviews | **70.9% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 30 MB | 130 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Redtail Technology, Inc.](https://appshunter.io/developer/347316603) | [CellTrust Corporation](https://appshunter.io/developer/516410103) |

## What reviewers say

### Redtail CRM

[App page](https://appshunter.io/ios/app/redtail-crm/id1088069067)

Manage client relationships with access to contact information, calendar items, and CRM capabilities on the go. Stay connected to clients, prospects, and your team with features for scheduling, communication, and data management.

**Highlights:** Access client contact information, Manage calendar and schedule activities, View and edit contact details, Add notes to contact records, Communicate with contacts via phone/email, Track client opportunities

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🔒 Secure
- 👍 Convenient for on-the-go work
- 👍 Logical and helpful system
- 👍 Exact and available with great service

**What reviewers complain about**

- 🐛 App never works or crashes constantly
- 🐛 Calendar won't load or sync properly
- 🐛 Difficult to complete tasks with notes
- 🐛 Slow loading times
- 🐛 Doesn't update opportunities linked with contacts

**Reported bugs**

- Calendar won't load
- Crashes when adding events
- Navigation button blocked by graphic

**Requested features**

- Search feature for client notes
- Birthdays shown in notifications
- Kanban view for opportunities
- Integration with Zimbra Calendar
- Face ID support


### 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


## Frequently asked questions

### Is Redtail CRM free?

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

### Is CellTrust SL2 free?

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

### Which has better reviews, Redtail CRM or CellTrust SL2?

Redtail CRM is rated higher. Redtail CRM averages 4.6 out of 5 from 695 ratings, while CellTrust SL2 averages 3.2 from 27 ratings.

### Do Redtail CRM or CellTrust SL2 have ads?

Neither Redtail CRM nor CellTrust SL2 shows ads.

### Which is updated more often, Redtail CRM or CellTrust SL2?

Redtail CRM ships an update fortnightly, and CellTrust SL2 every 2 months. Most recently, Redtail CRM was updated on November 2, 2026 and CellTrust SL2 on November 2, 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.*