# SRF Diagnosis vs XDiscovery

The clearest difference is update cadence: SRF Diagnosis at every 3 months against XDiscovery's every 30 months. 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.

SRF Diagnosis ships an update every 3 months, XDiscovery every 30 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SRF Diagnosis | XDiscovery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 30 months |
| Size | 1 MB | 1 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BERNSTEIN AG](https://appshunter.io/developer/731893093) | [Taehyuk Kwon](https://appshunter.io/developer/1702983946) |

## What reviewers say

### SRF Diagnosis

[App page](https://appshunter.io/ios/app/srf-diagnosis/id1583956869)

**In-app purchases:** none


### XDiscovery

[App page](https://appshunter.io/ios/app/xdiscovery/id6484504573)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SRF Diagnosis free?

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

### Is XDiscovery free?

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

### Do SRF Diagnosis or XDiscovery have ads?

Neither SRF Diagnosis nor XDiscovery shows ads.

### Which is updated more often, SRF Diagnosis or XDiscovery?

SRF Diagnosis ships an update every 3 months, and XDiscovery every 30 months. Most recently, SRF Diagnosis was updated on October 9, 2026 and XDiscovery on October 24, 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.*