Track your throw and swing speed with iPhone or Apple Watch. 3D Motion Paths achievements, weekly trends, and real-time speed tracking for disc golf, baseball, + more!
Track your arm speed, no radar gun needed. Arm Speed uses motion sensors on your iPhone or Apple Watch to measure throw and swing speed in real time. Built for athletes who want to train smarter and track progress across every session.
WORKS WITH iPHONE AND APPLE WATCH
Version 3.0 introduces iPhone motion tracking: just hold your phone and throw or swing. Apple Watch support is still here and better than ever. Train with whichever device you have on hand.
REAL-TIME SPEED TRACKING
See your speed instantly after every throw or swing. Arm Speed detects each motion automatically, no buttons to press, just start a session, do your thing, and watch the numbers appear. See device acceleration change in realtime: even the slightest device jiggle will impact real time acceleration.
SEE YOUR MOTION PATH
Go beyond the number. Every throw and swing is captured as a 3D motion path, a ribbon that traces your arm through the air. Thicker means faster, and color grades your smoothness from fluid green to jagged red. Spin the path around, compare reps, and spot hitches in your mechanics that a speed reading alone can't show.
PERSONAL RECORDS AND ACHIEVEMENTS
Track your all-time top speed, best session, longest streak, and more. Unlock achievements as you hit milestones., from your first 30 MPH throw to logging your 1,000th rep. Celebration animations fire off when you break a record or unlock something new.
WEEKLY TRENDS AND ANALYTICS
See how your speed and volume change week over week. A ghost line overlays your previous week so you can visualize improvement at a glance. Speed band breakdowns show where your throws are clustering, and daily activity heatmaps keep you accountable.
HEALTH APP INTEGRATION
Every session can log as a workout in Apple Health with heart rate tracking. Your training data lives alongside the rest of your fitness profile.
FREE TO USE
Arm Speed is free to download and start tracking. Upgrade to Arm Speed Pro to unlock interactive 3D motion paths, unlimited session history, search and filters across your sessions, advanced speed and acceleration charts, custom chart date ranges, bulk session management, personal records, achievements, and weekly trends.
BUILT FOR YOUR SPORT
Baseball throwing and batting
Disc golf and frisbee throws
Softball pitching and hitting
Pickleball serves and volleys
Tennis serves and groundstrokes
Golf swing speed
Football throws
Cricket bowling and batting
Hockey and lacrosse stick speed
Badminton, racquetball, and more
Website: https://armspeed.app
Follow @arm_speed_app on Instagram for news and updates.
Questions or feedback? Email: feedback@fre-studios.com
Terms of Service: https://armspeed.app/legal/terms
Privacy Policy: https://armspeed.app/legal/privacy
Does a great job of calculating speed, excellent integration with Apple Watch
What happened
elppauoywercs
This used to be a decent app but with this new update it’s no longer working on my Apple Watch, says failed to start workout even after resetting and updating the watch it still won’t work but loads up and works fine with my phone
Developer Response
Hello, sorry to hear about the issues with Apple Watch setup. We recently have updates that should make the Apple Watch experience more stable. If you are still experiencing issues, can you email us at support@fre-studios.com so we can look into your issues? Thanks for trying Arm Speed Motion Analyzer.
I like the idea, any help?
bageleater
This app isn’t recording speeds on my Apple Watch series 3, also when it does it only says I’ve thrown at 33mph even when I throw a disc 400 feet, the math doesn’t add up
AVOID. Does not do anything
keepflyin
Apparently it uses iCloud to “sync data” from watch to phone. However. This feature is non-existent because no where will you find an export or restore from iCloud data feature. Nowhere in settings on either watch or phone app will it allow you to actively grab that data and place it into, what I can only imagine is some sort of chart on your phone. An excel spreadsheet would be more useful. Wasted $3 and an hour of my life trying to get it to work. Giving up and deleting. While f-in around with it, each time I try to adjust start & end dates, it just crashes. TL;DR: Does not work as advertised.
Arm Speed 3.2.0 — A rebuilt History tab. See more at a glance, and find any session in seconds.
NEW: Redesigned session cards — your top speed in its performance color, a mini bar chart of the session's throws, plus time, throw count, and heart rate on Apple Watch sessions.
NEW: Sessions grouped by day — Today, Yesterday, and clear dates make scanning your history effortless.
NEW: Search your history — find any session by name (Pro).
NEW: Filters — narrow History by date range, device, activity, or sessions with records and achievements (Pro).
NEW: Rename from History — retitle a session straight from the list.
NEW: Endless scrolling — History keeps loading as you scroll and returns you right where you left off.
NEW: Safer deleting — deletions now ask for confirmation, so a stray swipe can't erase a session.
FIX: Better VoiceOver descriptions and large-text layouts throughout History.
Thanks for using Arm Speed! If you enjoy the app, a review on the App Store goes a long way.
Questions? Email: feedback@fre-studios.com
Version 3.2.0
The developer, FRE STUDIOS LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
