iPhone & iPad App for Baseball & Softball Coaches

Reactr

Machine Speed to Game Speed.

Reactr converts pitching machine speeds into equivalent game speeds — so every rep at practice delivers the reaction time your hitters will actually face in a game. Set a machine speed, set your distance, and know exactly what you're training against.

FreeNo trial. No subscription. No catch.
⬇  Download FreeSee How It Works
Machine Speed Mode
Game Speed Mode
Reaction Time
Reactr pitch speed conversion app running on iPhone and iPad

Native iPhone & iPad app  · Baseball & Softball  · 100% Free — no subscription, ever  · Works offline — no WiFi needed  · No account required

Simple by Design

Two dials.
Instant answer.

Reactr is built around one powerful insight: the distance between your machine and home plate changes everything. Set two values. Get the truth about what your hitters are training against.

01
Set Your Speed
Drag the top dial to your machine speed — or in Game Speed mode, drag it to the game equivalent speed you want to simulate.
02
Set Your Distance
Drag the bottom dial to the distance your machine is from home plate at practice today.
03
Read the Ring
The speed ring shows the equivalent game speed, reaction time in milliseconds, and a color-coded difficulty rating — instantly.
04
Share the Setup
Tap Share to text the full practice configuration — machine speed, distance, game equivalent, and reaction time — to any coach.

Mode 1

Machine Speed
Mode.

“My machine is set to 60 mph at 40 feet — what are my hitters reacting to?”

Dial in your machine speed and practice distance. Reactr instantly shows the equivalent game speed your hitters are training against — and the reaction time in milliseconds. No guessing.

  • ▶
    Equivalent game speed — see the true MPH your hitters are reacting to in game terms
  • ▶
    Reaction time in ms — know exactly how long a hitter has to decide and swing
  • ▶
    Color-coded difficulty — Blue through Red, from easy to track up to elite velocity
  • ▶
    Game distance badge — always shows which official distance the calculation is based on
Reactr machine speed mode showing equivalent game speed on the speed ring

Mode 2

Game Speed
Mode.

“I want my hitters training against 85 mph reaction time — what do I set the machine to?”

Work backwards from the game. Set the game speed you want to simulate and your practice distance. Reactr tells you exactly what to dial into the machine.

  • ▶
    Target-first workflow — start with the game speed you want, not the machine speed you have
  • ▶
    Precise machine setting — the ring displays the exact MPH to set on your machine
  • ▶
    Full context displayed — game speed, reaction time, and difficulty all shown together
  • ▶
    Build progressions — step up game speed targets to plan a full session of reaction-time training
Speed Dial
Drag to set machine or game speed
← 1 MPH per tick  ·  major tick every 5 MPH →

“A machine set to 60 mph at 35 feet doesn't give hitters a 60 mph reaction time. The distance changes everything. Now you can set the exact reaction time for every drill.”

The principle behind Reactr

Key Features

Everything a
coach needs.

Built for coaches who run pitching machines and want their practice reps to match the real demands of the game — on any iPhone or iPad.

⚾
Baseball & Softball
Full support for both sports. Separate speed ranges, distance ranges, and official game distances for every level of play.
🎯
Equivalent Game Speed
See the true MPH your hitters are reacting to — adjusted for practice distance vs official game distance.
⏱
Reaction Time in Ms
Know exactly how many milliseconds your hitters have to decide and swing. Under 400 ms is elite territory.
🔄
Two Calculation Modes
Machine Speed mode converts your machine setting. Game Speed mode works backwards from your target game speed.
🎨
Color-Coded Difficulty
Blue = Easy to track. Green = Developing. Gold = Competitive. Orange = Advanced. Red = Elite. Updates live.
📐
Game Distance Settings
Set the official pitching distance for your level — Little League through Pro — for both baseball and softball.
📤
Share Practice Setup
Text your full configuration to the coach at the machine. Machine speed, distance, game equivalent, and reaction time in one tap.
📱
iPhone & iPad
Adaptive layout for every screen size. Portrait and landscape. Optimized for the field, cage, or bullpen.
📶
Works Completely Offline
No WiFi or cellular required. No account. No sign-in. Open the app and go.
💸
100% Free
No trial period. No subscription. No in-app purchases. Free on every device you own, today and forever.

Native iOS App

iPhone & iPad.
Built for the field.

Reactr is a fully native iOS app built for coaches who are standing next to a pitching machine. Portrait or landscape. Results in under two seconds. Works in any cage, bullpen, or practice field — with or without WiFi.

  • ▶
    Optimized for iPhone & iPad — adaptive layout works on every screen size in portrait and landscape
  • ▶
    Haptic dial controls — drag to set speeds with tactile feedback on every tick, major pulse every 5 MPH
  • ▶
    Works completely offline — no WiFi or cellular needed on the field, cage, or bullpen
  • ▶
    No account required — open the app and go. Zero setup friction.
  • ▶
    Free forever — no subscription, no trial, no catch. Download and keep it.
Reactr pitch speed conversion app shown on iPhone and iPad

Available Now — Completely Free

Know exactly what your
hitters are training against.

Download Reactr free on your iPhone or iPad. No trial. No subscription. No account. Just set your machine speed, set your distance, and know the truth.

Download Reactr on the App Store

For iPhone & iPad  ·  iOS 17+  ·  Baseball & Softball  ·  Free