# Diamond Nine Athletics — D9 > Pitching analytics app for athletes and coaches to track performance and training. (iPhone/iPad app by Diamond Nine Athletics LLC.) - Source: https://appshunter.io/ios/app/diamond-nine-athletics/id6762482389 (this page in markdown: same URL + `.md`) - Developer: [Diamond Nine Athletics LLC](https://appshunter.io/developer/1894309704) - Category: Sports - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 12+ - Requires: iOS 16.0 · 17 MB - Languages: American English - Released: 2026-06-09 - Data updated: 2026-09-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/diamond-nine-athletics/id6762482389/reviews.md ## What is Diamond Nine Athletics? Diamond Nine Athletics is the pitching analytics app built for serious players and the coaches developing them. Upload your Rapsodo or Trackman session in seconds. Watch your max velo, average velo, spin rate, spin efficiency, induced vertical break, horizontal break, vertical approach angle, extension, and release height come to life across every pitch type you throw. For Athletes: • Drop in a CSV export from your bullpen — your stats parse instantly • Track every pitch type separately (fastball, slider, curveball, changeup, cutter, sinker) • See your strike zone heatmap, release point consistency, and pitch movement profile • Watch your progression over time on every metric • View your personal bests by pitch type • Stack up against every other Diamond Nine athlete on the leaderboard • Receive your training plan from your coach, day by day For Coaches: • Manage your roster from one place • Build week-by-week training plans on a full month calendar • Bulk-assign drills to multiple athletes — repeat across weeks in one tap • Build a personal drill library that auto-suggests as you program • Watch your athletes' progression, ranked side by side on the dashboard • Send custom video drills, YouTube links, or your own clips • Get alerted when an athlete falls behind on the day's training • Export professional PDF reports for college coaches and scouts Built for High School, College, Travel Ball, and Pro pitchers. Diamond Nine is private by design — your data stays yours, only your coach sees what you choose to share. Diamond Nine is for athletes 13 and older. Built with input from working pitching coaches. ## Key features - Analyze Rapsodo/Trackman data - Track pitch types and metrics - View strike zone heatmaps - Monitor progression over time - Manage athlete rosters - Create custom training plans - Generate PDF reports ## Frequently asked questions about Diamond Nine Athletics ### What data sources does Diamond Nine Athletics use? Diamond Nine Athletics can import data from Rapsodo or Trackman sessions. It also allows for CSV exports from bullpen sessions to be parsed instantly. ### What pitching metrics can I track with Diamond Nine Athletics? You can track max velocity, average velocity, spin rate, spin efficiency, induced vertical break, horizontal break, vertical approach angle, extension, and release height for every pitch type. ### Can coaches manage multiple athletes with Diamond Nine Athletics? Yes, coaches can manage their entire roster from one place, build week-by-week training plans, and bulk-assign drills to multiple athletes. ### Is Diamond Nine Athletics available on Android devices? Currently, Diamond Nine Athletics is only listed as supported on iPhone devices. Please check the app store for the most up-to-date platform compatibility. ### How often is Diamond Nine Athletics updated? The latest version is 1.5, and the app was last updated on August 20, 2026. This indicates a recent update, suggesting active development. ### What is the age rating for Diamond Nine Athletics? Diamond Nine Athletics has an age rating of 12+, making it suitable for teenagers and older users. ### Does Diamond Nine Athletics have ads? No, Diamond Nine Athletics does not contain advertisements. It is a completely ad-free experience for users. ### How does Diamond Nine Athletics handle user data privacy? Diamond Nine Athletics is private by design, ensuring that your data remains yours. Only the data you choose to share with your coach is visible to them. ## Version history (last 5 releases) ### 1.7 — 2026-08-31 New in this update: • Film Analysis — draw right on any clip. Pause on a frame and mark it up with a pen, straight lines, or the angle tool to break down mechanics, then step frame-by-frame or slow it down. • Fixed password reset — the reset code from your email now works reliably. • Fixed missing pitches — every pitch in a session (including Fastballs) now shows up in the session view, not just in your totals. • Compare Film now fills the screen — both clips play in two full, stacked boxes, easy to see side by side. • Additional fixes and improvements. Thanks for training with Diamond Nine! ### 1.6 — 2026-08-26 This update makes Diamond Nine faster, cleaner, and more reliable: • Notifications — get a lock-screen alert when your coach posts a new session, assigns training, or you set a new PR. • My Film — every clip your coach shares with you, session film and video, now lives in one place for quick access. • Rock-solid data — your sessions, plyo numbers, and notes stay put and now flow everywhere they should: trends, over-time charts, and your Arsenal all reflect every upload. • Profile photos — tap your picture to add or change it. • A cleaner look — refreshed charts, an accurate 18-inch strike zone, an easier-to-read pitch-by-pitch view, a new app icon, and a smoother feel throughout. • New here? A quick welcome tour shows you where everything is. Thanks for training with Diamond Nine! ### 1.5 — 2026-08-20 This update makes Diamond Nine more reliable than ever: • Rock-solid data — your plyo numbers, session videos, and notes now save permanently and will never disappear. • Smoother saving — changes save instantly and reliably, with no flicker or lost edits. • Clearer passwords — sign-up and password reset now show exactly what's required, with a live checklist as you type. • Various bug fixes and performance improvements. Thanks for being part of Diamond Nine Athletics! ### 1.4 — 2026-08-19 Reliability fixes: coach entries (plyo velos, training plans, session notes and video) now save reliably and confirm before finishing, so nothing gets lost on a weak connection. ### 1.3 — 2026-08-13 Plyo tab upgrades: • Progress charts — track velo trends over time by throw type and ball weight • Bulk logging — record a whole plyo session at once instead of one throw at a time • PR alerts — athletes and coaches get notified when a new personal best is set Progression chart now shows a velocity trend line with a next-month projection. Compare Film is now full-screen with synced Play/Pause, so you can watch two deliveries side-by-side at full size. Plus reliability improvements. ## Apps similar to Diamond Nine Athletics | App | Rating | Price | Category | | --- | --- | --- | --- | | [SicEm365](https://appshunter.io/ios/app/sicem365/id6449369904) | 5.0 (15) | Free | Sports | | [SNU Intramurals](https://appshunter.io/ios/app/snu-intramurals/id1476128477) | 5.0 (1) | Free | Sports | | [SNU Athletics](https://appshunter.io/ios/app/snu-athletics/id1601899445) | 5.0 (2) | Free | Sports | | [Blast Baseball Team Admin](https://appshunter.io/ios/app/blast-baseball-team-admin/id1339272953) | 4.2 (5) | Free | Sports | | [PWHL (Unofficial)](https://appshunter.io/ios/app/pwhl-unofficial/id6749966939) | 5.0 (10) | Free | Sports | | [AA Baseball](https://appshunter.io/ios/app/aa-baseball/id1618475150) | 3.1 (9) | Free | Sports | ## Related topics [pitch trainer app](https://appshunter.io/ios/topics/pitch-trainer-app) --- *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 2026-09-05.*