Acemaster® vs Inertia X1
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Acemaster®
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Acemaster® is the integrated training system for Tennis, Padel and Pickleball that makes it easy and fun for everyone to train. Download the workout, read the description, and watch the tutorial. Start the workout by clicking the Start button! Look in the App, check progress, and train! You can choose the workout from those prepared by the best instructors, watch the workout tutorial, and with one click you can start Tito, the professional ball machine, so you can do the workout as it is explained in the tutorial.
Inertia X1
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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
Screenshots
Verdict
The clearest difference is ads: Inertia X1 at none against Acemaster®'s shown. Acemaster®'s advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Acemaster® | Inertia X1 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | — |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 57 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Clevsi S.r.l. | Paolo Gallo |
In-app purchases
Acemaster®
No in-app purchases
Inertia X1
No in-app purchases









