The guy on the mound across from you is more predictable than he thinks, and now there's a number for exactly how predictable. That's the headline of PitchGuessr v1.3, which is live on the App Store as of this week. It watches where your opponent has been throwing, grades how readable he is, and tells you the moment he changes the plan mid-game. The longer version is below — and if you've never opened the app, start at the top.

What PitchGuessr is

PitchGuessr is the iOS app I build for one job: knowing where your opponent will pitch before they do. It's a companion app for online MLB The Show — you keep it open next to the game and tap where each pitch lands.

Here's the loop. During an at-bat you log every pitch on a 25-zone grid — the nine strike zones plus the sixteen ball zones around them — along with the count and the handedness matchup. PitchGuessr builds a live map of your opponent's tendencies, one pitch at a time, and overlays a heatmap plus a prediction for where the next one's coming.

Two prediction models do the reading:

• Standard filters to the exact count and handedness you're in right now. Best once you've logged enough pitches at that count.
• Matchup uses handedness only and ignores the count — better for a cold opponent or early in a session before count-specific data builds up.

The point is that most players scout by feel and memory. After three innings of a tense ranked game, "I think he's been going away on me" is about all your brain is holding. PitchGuessr holds the actual data — and the more you face the same opponent, the sharper it gets, because the history persists across sessions.

The whole window: log each pitch on the 25-zone grid, and the Zone Splits panel reads it back live. This guy grades a 37, with 10% of everything landing in two specific zones — that's the kind of thing you'd never hold in your head at 2-1 in the seventh.

A few things worth knowing up front:

• It runs on-device. No account, no login — your data is yours and stays on the phone. (iCloud sync is there as an optional Pro convenience across your devices.)
• It covers MLB The Show on iOS 17+, iPhone and iPad.
• It's free, and free is unlimited — full pitch tracking, both prediction models, the whole zone grid, every game. The free tier is ad-supported. Lite ($2.99/year) is the same app with the ads removed. Pro ($9.99/year) unlocks the advanced insights — including everything new below — and drops the ads too.

That's the baseline. Here's what v1.3 added.

What's new in v1.3

The theme of this release is reading the pitcher, not just mapping him. The old app told you where your opponent throws. The new one tells you how predictable he is and whether he just changed. And it does it with zero setup — these show up on their own while you track.

Auto Insights (Pro)

These appear automatically in the Zone Splits panel as you log pitches. No buttons, no configuration — tap any row for a full plain-language explanation of what it's telling you.

• Predictability Score — a single 0–100 read on how readable a pitcher's locations are. Low means he's mixing it up and you should trust the matchup over a hunch. High means he's leaning on a pattern, and you can sit on it. It's the fastest possible answer to "is this guy actually doing something, or am I imagining it?"
• Situational Tendencies — whether he attacks the zone or chases you out of it, broken down by count — plus his first-pitch and two-strike habits specifically. Those are the two counts that decide at-bats. Knowing a guy goes glove-side-low with two strikes every time is the difference between a strikeout and a walk-off.

Tap the Predictability row and it spells out the whole scale. A 37 means "some tendencies, but fairly mixed" — trust the matchup, don't sit dead-red yet. It needs eight pitches before it'll commit to a number.

Situational Tendencies in plain English: is he giving you a strike here, or trying to get you to chase? Split by count posture, first pitch, and two strikes — the spots that actually decide at-bats.

Recency Window (Pro)

• Base your predictions on only the last 10 or 25 pitches of the matchup instead of the whole history. This is the one that catches a pitcher adjusting mid-game — when a guy who pounded the inside corner for three innings suddenly starts living away because he finally noticed you sitting on it.
• The window narrows everything at once: the heatmap, the Predictability Score, and the Situational Tendencies all recompute against just the recent pitches.
• It's in the prediction controls, and it resets to All on a new game so you never carry a stale window into a fresh opponent.

The Recency Window lives in the prediction controls. Flip it to Last 10 or Last 25 and the heatmap, the Predictability Score, and the tendencies all recompute against just the recent pitches — so the read follows him when he adjusts.

PitchGuessr has a sibling

PitchGuessr reads the guy pitching to you. PitchTunnels builds the arsenal you throw — it pairs the two pitches in a card's repertoire that look identical out of the hand and then go to different ZIP codes, which is the closest thing to a legal cheat code The Show has. If you pitch as much as you hit, you want both apps open. I wrote up everything new in PitchTunnels v1.3 here, and it's free on the App Store.

Both are part of the DiamondOps family — the same ecosystem as the DiamondOps.gg market and scouting web app. One account, one set of tools, built for people who'd rather win on information than vibes.

More Pro depth: the Strike Rate grid says this guy throws a strike 100% of the time at 2-1. And see that line at the bottom — "the best pitch tunnels → PitchTunnels"? The two apps already talk to each other.

Why I built it

I built PitchGuessr because I kept trying to scout opponents in my head and kept losing the thread. You face the same handful of people on a ranked ladder, each one has a pattern, and the pattern is exactly the kind of thing that evaporates the second the game gets tense. I'd know a guy buried me inside last series and then completely blank on it in the box. So I built the thing that remembers for me — and then kept making it smarter, which is how a pitch-logger turned into something that grades how predictable a person is and flags the moment they switch it up. That's v1.3.

How to get it

PitchGuessr is free on the App Store — search "PitchGuessr" or grab it on any iPhone or iPad running iOS 17 or later. Download it, keep it open next to your next ranked game, and start tapping where the pitches land. By the third inning you'll have a Predictability Score on the guy across from you, and you'll know whether to trust it or wait for him to blink.

If you want the Auto Insights and the Recency Window, that's Pro at $9.99/year — and if you just want the free app without ads, Lite is $2.99/year.

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PitchGuessr is free on the App Store. v1.3 shipped June 2026.