# Inertia X1

> Inertia X1 (iPhone/iPad app by Paolo Gallo.)

- Source: https://appshunter.io/ios/app/inertia-x1/id6811685604 (this page in markdown: same URL + `.md`)
- Developer: [Paolo Gallo](https://appshunter.io/developer/6811685606)
- Category: Sports, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 4 MB
- Languages: American English
- Released: 2026-09-15
- Data updated: 2026-10-05

## What is Inertia X1?

Inertia X1 is a professional application for measuring the swingweight of tennis rackets.

The app is designed to work in conjunction with the Inertia X1 measuring instrument by Pagal Lab, which uses an oscillating support to precisely determine the moment of inertia of the racket around the swing axis.

KEY FEATURES

• Swingweight measurement (moment of inertia around the handle axis)
• Twistweight calculation (difference between swingweight and spinweight)
• Recoilweight and polarization index calculation
• Built-in digital level for correct instrument positioning
• Racket archive with measurement history
• Data export in JSON format

HOW IT WORKS

The racket is mounted on the Inertia X1 instrument and set into oscillation. The smartphone's gyroscopic sensor detects the oscillation period and the app automatically calculates all dynamic parameters. The procedure takes only a few seconds and delivers laboratory-grade accuracy.

SETUP

The app is configured via the QR code on the instrument, which automatically loads the calibration parameters specific to each unit.

For more information about the Inertia X1 measuring instrument: www.pagal-lab.com

## Is Inertia X1 safe?

Not enough ratings yet to assess Inertia X1.

## Is Inertia X1 legit?

Inertia X1 has limited verification signals. The AppsHunter Legitimacy Score for Inertia X1 is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### v1.4.0 — 2026-09-15

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-05.*