# SecureSystems by SyncDog vs Pi Epsilon

The clearest difference is rating: Pi Epsilon at 5.0 against SecureSystems by SyncDog's 3.0. SecureSystems by SyncDog's advantage is update cadence (weekly vs every 6 months). On price, ratings volume, 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.

Pi Epsilon holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 6 and 4 respectively.

SecureSystems by SyncDog ships an update weekly, Pi Epsilon every 6 months. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SecureSystems by SyncDog | Pi Epsilon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (6 ratings)](https://appshunter.io/ios/app/securesystems-by-syncdog/id1276596140/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pi-epsilon/id1594236510/reviews)** |
| Number of ratings | **6** | 4 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Free | Free |
| Size | 448 MB | 147 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SyncDog, Inc.](https://appshunter.io/developer/1182319086) | [Chesapeake International Consulting, LLC](https://appshunter.io/developer/1589725776) |

## What reviewers say

### SecureSystems by SyncDog

[App page](https://appshunter.io/ios/app/securesystems-by-syncdog/id1276596140)

This app provides a secure, containerized workspace for enterprise data on mobile devices. It protects sensitive information at rest and in transit through a sandboxed environment for various work-related applications.

**Highlights:** Containerized secure data platform, Protects data at rest and in transit, Sandboxed applications, Supports secure communications, Secure file management, Secure internet/intranet access, Secure location-based services

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Pi Epsilon

[App page](https://appshunter.io/ios/app/pi-epsilon/id1594236510)

A decentralized, anonymous, and end-to-end encrypted communication platform offering voice, text, video, and group calls. It provides robust security features and full user control over the server environment, bypassing third-party providers.

**Highlights:** Decentralized and anonymous communication, End-to-end encryption, Voice, text, and video calls, Group video conferencing, User-controlled server hosting, Decoy obfuscation tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SecureSystems by SyncDog free?

SecureSystems by SyncDog is free to download, with no in-app purchases.

### Is Pi Epsilon free?

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

### Which has better reviews, SecureSystems by SyncDog or Pi Epsilon?

Pi Epsilon is rated higher. SecureSystems by SyncDog averages 3.0 out of 5 from 6 ratings, while Pi Epsilon averages 5.0 from 4 ratings.

### Do SecureSystems by SyncDog or Pi Epsilon have ads?

Neither SecureSystems by SyncDog nor Pi Epsilon shows ads.

### Which is updated more often, SecureSystems by SyncDog or Pi Epsilon?

SecureSystems by SyncDog ships an update weekly, and Pi Epsilon every 6 months. Most recently, SecureSystems by SyncDog was updated on September 10, 2026 and Pi Epsilon on September 17, 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.*