# CSI Secure Connect vs Letro

The clearest difference is rating: Letro at 5.0 against CSI Secure Connect's 2.7. CSI Secure Connect's advantage is ratings volume (11 vs 3). 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.

Letro holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 11 and 3 respectively.

CSI Secure Connect ships an update every 3 weeks, Letro every 2 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | CSI Secure Connect | Letro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (11 ratings)](https://appshunter.io/ios/app/csi-secure-connect/id651639917/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/letro-secure-communication/id6758909629/reviews)** |
| Number of ratings | **11** | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 77 MB | 303 MB |
| Requires iOS | **17.2** | 18.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Computer Services, Inc.](https://appshunter.io/developer/448800531) | [Letro](https://appshunter.io/developer/1875687658) |

## What reviewers say

### CSI Secure Connect

[App page](https://appshunter.io/ios/app/csi-secure-connect/id651639917)

Facilitates secure and efficient communication for board members, providing easy access to confidential documents and tools for online votes and discussions. It simplifies data sharing to enhance corporate communication and productivity.

**Highlights:** Secure access to board materials, Online votes and discussion threads, Shared calendar for meeting scheduling, Storage for current and archived documents, No additional hardware or software required

**Features:** macOS Compatibility

**In-app purchases:** none


### Letro

[App page](https://appshunter.io/ios/app/letro-secure-communication/id6758909629)

This secure communication platform offers end-to-end encrypted messaging, file sharing, and document exchange for enterprises. It provides a tamper-proof, blockchain-verified record of all communications, designed to replace email and chat with enhanced security and compliance features.

**Highlights:** End-to-end encryption, Blockchain-verified records, Spam and phishing proof, Role-based permissions, Automated approval chains, Decentralized and federated architecture, Offline communication capability

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

**In-app purchases:** none


## Frequently asked questions

### Is CSI Secure Connect free?

CSI Secure Connect is free to download, with no in-app purchases.

### Is Letro free?

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

### Which has better reviews, CSI Secure Connect or Letro?

Letro is rated higher. CSI Secure Connect averages 2.7 out of 5 from 11 ratings, while Letro averages 5.0 from 3 ratings.

### Do CSI Secure Connect or Letro have ads?

Neither CSI Secure Connect nor Letro shows ads.

### Which is updated more often, CSI Secure Connect or Letro?

CSI Secure Connect ships an update every 3 weeks, and Letro every 2 weeks. Most recently, CSI Secure Connect was updated on November 1, 2026 and Letro on November 5, 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.*