# Federgraph vs XSpecApp

The clearest difference is in-app purchases: Federgraph at none against XSpecApp's 1. XSpecApp's advantage is update cadence (every 2 days vs every 15 months) and iOS requirement (8.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. XSpecApp sells 1 one-off in-app purchase. Federgraph asks for nothing beyond the download.

Federgraph ships an update every 15 months, XSpecApp every 2 days. Both last shipped on September 9, 2026.

## The numbers

| Metric | Federgraph | XSpecApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/xspecapp/id1666746288/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 48 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Schubert](https://appshunter.io/developer/670940970) | [Brian Cross, XRF Consulting, LLC](https://appshunter.io/developer/1666746290) |

## What reviewers say

### Federgraph

[App page](https://appshunter.io/ios/app/federgraph/id670940947)

**In-app purchases:** none


### XSpecApp

[App page](https://appshunter.io/ios/app/xspecapp/id1666746288)

This application displays EDXRF spectra, allowing users to manually identify elements, calculate ROIs, and add annotations. It supports saving, loading, and printing spectra with detailed information. The app can also acquire spectra using a digital pulse processor via USB, Serial, or wireless connections.

**Highlights:** Manual element identification, ROI calculation for peaks, Spectrum annotations, Spectrum printing with ROIs, Save and load spectra, Acquire spectra via digital pulse processor

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| XSpecApp | $24.99 | one-time |


## Frequently asked questions

### Is Federgraph free?

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

### Is XSpecApp free?

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

### Do Federgraph or XSpecApp have ads?

Neither Federgraph nor XSpecApp shows ads.

### Which is updated more often, Federgraph or XSpecApp?

Federgraph ships an update every 15 months, and XSpecApp every 2 days. Most recently, Federgraph was updated on September 9, 2026 and XSpecApp on September 9, 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.*