Stuff or Not vs Roundnet Scorekeeper

The baseball pitching statistic known as Stuff+ compares the physical characteristics of a pitch (Release point, velocity, spin vector, movement profile) to the expected run value. In other words, how many runs are scored on a particular type of pitch? Every Stuff-type pitch grader uses a different combination of pitch variables, sometimes including pitch location, arsenal information, batter attributes (like handedness), and even pitch sequence. Usually, the ultimate goal is to apply a rating to a pitch, and ultimately grade a pitcher's arsenal. One thing lost in this grading approach is understanding how a specific kind of pitch can lead to specific outcomes. For example, sometimes you need a ground ball. How often does a particular sinker lead to a ground ball, and what tweaks to velocity, movement, release point or sequencing can make that pitch even more likely to result in a grounder? This link between pitch characteristics and batted ball types (or event types like whiffs) can have an outsized impact on calling pitches and managing games. The Stuff or Not app is designed to provide coaches and players easily accessible information about event type outcomes, and expected statistics like xAVG and xSLG, for different pitches. The app is built on data from over 5 million Division 1 (D1) college pitches and over 2.2 million Major League Baseball (MLB) pitches from 2022-2025. The app's dashboard screen makes it easy for players to input pitch characteristics and see D1 and MLB event outcome likelihoods. This dashboard is particularly useful for adding competition, and another dimension of coaching, to bullpen sessions. The heatmap screen allows the user to see how quickly, and in what direction, event type outcomes vary with changing pitch characteristics.

Roundnet Scorekeeper is the all-in-one match tracker for Roundnet (commonly known as Spikeball). Whether you're playing a casual game at the park or running a full tournament bracket, this app makes scorekeeping effortless. KEY FEATURES - Track every point with a clean, glanceable scoreboard - Visualize the court with a top-down field view showing server, receiver, and player positions - Apple Watch companion app — score from your wrist, automatically synced with your iPhone - Full IRF Official rules support — including 2-serve turns and rotation after points 3, 7, 11, 15… - Continuous serve mode with 5-point rotations for casual play - Customizable score limits and Win-by-2 rule - Match history with full set-by-set breakdowns - Stats tab to track your performance over time ROUNDNET SCOREKEEPER PRO Upgrade once to unlock everything — no subscription, no recurring fees: - Unlimited match history (free saves your last 5 matches) - Full stats dashboard — filter by day, week, month, year, or all time - Personalize your theme — choose your app accent, server, and receiver colors - 9 app icon variants to match your style - Match time limits — end a match at a score or time, whichever comes first - Share match results as clean, shareable images - Best of 5 match format - Match names, locations, and notes - Early access to new features DESIGNED FOR PLAYERS No accounts. No ads. No tracking. Just a fast, focused tool that does one thing well: track your matches. All match data is stored locally on your device, and the app works completely offline — perfect for parks, beaches, and tournaments where Wi-Fi is unreliable. APPLE WATCH SUPPORT Score points right from your wrist. Switch between scoreboard view, court view, and match info with a swipe. Server changes and rotations are automatically reflected on both your iPhone and Watch. Your custom theme colors sync to your watch automatically. QUESTIONS OR FEEDBACK? Reach out any time from the Settings tab — we'd love to hear from you.