# Stuff or Not — A mobile baseball pitch grader

> Baseball pitch analysis app linking pitch characteristics to batted ball outcomes. (iPhone/iPad app by Adam Christian Maloof.)

- Source: https://appshunter.io/ios/app/stuff-or-not/id6744778299 (this page in markdown: same URL + `.md`)
- Developer: [Adam Christian Maloof](https://appshunter.io/developer/1710687417)
- Category: Sports, Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 281 MB
- Languages: American English
- Released: 2025-04-18
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/stuff-or-not/id6744778299/reviews.md

## What is Stuff or Not?

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.

## Key features

- Pitch characteristic analysis
- Batted ball outcome prediction
- Expected statistics (xAVG, xSLG)
- D1 and MLB pitch data
- Interactive heatmap visualization
- Bullpen session enhancement


## Frequently asked questions about Stuff or Not

### What is Stuff or Not?

Stuff or Not is a mobile application designed to analyze baseball pitch characteristics and predict their outcomes, such as ground balls or whiffs. It uses data from millions of collegiate and professional pitches to provide insights into how pitch variables affect batted ball events.

### What kind of data does Stuff or Not use?

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. This extensive dataset allows for robust analysis of pitch performance.

### How does Stuff or Not help coaches and players?

It provides easily accessible information about event type outcomes and expected statistics like xAVG and xSLG for different pitches. This helps in understanding how specific pitch types lead to desired outcomes and in refining pitching strategies.

### Can Stuff or Not be used during bullpen sessions?

Yes, the app's dashboard screen is particularly useful for adding competition and another dimension of coaching to bullpen sessions. Players can input pitch characteristics and see outcome likelihoods in real-time.

### What is the heatmap screen in Stuff or Not?

The heatmap screen allows users to visualize how event type outcomes change with variations in pitch characteristics. It shows how quickly and in what direction outcomes vary as velocity, movement, or release point are adjusted.

### What devices does Stuff or Not support?

Stuff or Not is currently supported on iPhone devices. The app was last updated on February 21, 2026, with version 1.1.

### Is Stuff or Not free to use?

Yes, Stuff or Not is available for free. It does not have in-app purchases or advertisements, offering a completely free experience for users.

### What is the age rating for Stuff or Not?

Stuff or Not has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

## Version history (last 2 releases)

### 1.1 — 2026-02-21

Bundled with the latest NCAA and MLB data, and added an 'Update Data' button to allow the user to update to the latest available pitch data.

### 1.0 — 2025-04-18

No release notes.

## Apps similar to Stuff or Not

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Baseball Odds](https://appshunter.io/ios/app/baseball-odds/id1614144874) | 5.0 (6) | Free | Sports |
| [Command Trakker](https://appshunter.io/ios/app/command-trakker/id1631036999) | 5.0 (1) | Free | Sports |
| [ArmBarn](https://appshunter.io/ios/app/armbarn/id6503445937) | 5.0 (1) | Free | Sports |
| [ScoutEdge: Baseball Analytics](https://appshunter.io/ios/app/scoutedge-baseball-analytics/id6748836801) | 5.0 (3) | Free | Sports |
| [iProScout Baseball](https://appshunter.io/ios/app/iproscout-baseball/id500218601) | 3.7 (3) | Free | Sports |
| [PAC-Hub](https://appshunter.io/ios/app/pac-hub/id1658990593) | 4.2 (5) | Free | Sports |

## More apps by Adam Christian Maloof

- [Hit or Not (Legacy)](https://appshunter.io/ios/app/hit-or-not-legacy/id6468853496)
- [PitSeason](https://appshunter.io/ios/app/pitseason/id6476927535)
- [Hit or Not](https://appshunter.io/ios/app/hit-or-not/id6744456329)

All apps by Adam Christian Maloof: https://appshunter.io/developer/1710687417

---

*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 2026-06-04.*