# System Guard vs PhoneDiagnostix

The clearest difference is in-app purchases: PhoneDiagnostix at none against System Guard's 1. PhoneDiagnostix also leads on ads (none vs shown). System Guard's advantage is update cadence (weekly vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. System Guard sells 1 one-off in-app purchase. PhoneDiagnostix asks for nothing beyond the download.

System Guard ships an update weekly, PhoneDiagnostix monthly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | System Guard | PhoneDiagnostix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (979 ratings)](https://appshunter.io/ios/app/system-guard/id1210477137/reviews)** | — |
| Number of ratings | **979** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 2 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RBT Digital LLC](https://appshunter.io/developer/1208547221) | [Sebastian Kirschner](https://appshunter.io/developer/1891177110) |

## What reviewers say

### System Guard

[App page](https://appshunter.io/ios/app/system-guard/id1210477137)

Monitor your device's performance, storage, and battery health with detailed insights and explanations. It offers hardware diagnostics, network analysis, and helpful widgets to keep you informed about your iPhone, iPad, or Watch.

**Highlights:** Real-time device status overview, Detailed battery health and charge cycles, Comprehensive device specifications, Storage usage and cleanup suggestions, Network connection and data usage analysis, Hardware diagnostic tests, Home Screen and Lock Screen widgets

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| System Guard Pro | $2.99 | one-time |


### PhoneDiagnostix

[App page](https://appshunter.io/ios/app/phonediagnostix/id6761736690)

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

**In-app purchases:** none


## Frequently asked questions

### Is System Guard free?

System Guard is free to download, with in-app purchases available.

### Is PhoneDiagnostix free?

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

### Do System Guard or PhoneDiagnostix have ads?

System Guard shows ads; PhoneDiagnostix does not.

### Which is updated more often, System Guard or PhoneDiagnostix?

System Guard ships an update weekly, and PhoneDiagnostix monthly. Most recently, System Guard was updated on November 3, 2026 and PhoneDiagnostix on October 31, 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.*