K Cast vs Relay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
K Cast
This app allows baseball pitchers and catchers to communicate pitch calls securely and efficiently using a phone and AirPods. It eliminates the need for traditional signs, speeding up games and preventing stolen signals.
- Secure pitch communication
- Uses phone and AirPods
- Optional Apple Watch integration
- Eliminates traditional signs
- Speeds up game play
- Prevents stolen signals
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K Cast is an app that enables you to securely communicate pitches to your catcher using only hardware you likely already have—your phone and AirPods. No need to buy expensive hardware or set up confusing electronics. Give your catcher one AirPod that is already paired to your phone. We highly recommended you put the phone in transparency mode to let outside sound in. You can then give your pitcher an Apple Watch(worn on the glove hand under a black wrist band) with the Apple Watch K Cast app running to completely remove the need for the catcher to signal pitches to the pitcher. This will speed up games, eliminate pitcher/catchers getting crossed up on pitches and prevent those pesky runners on second base from stealing your pitches and signaling to their hitters. Next, in the K Cast app, tap the location in or outside the strike zone where you want the pitcher to pitch the baseball, select the pitch type, and tap Send. That’s it. The application lets you know the pitch was transmitted to the catcher’s AirPod. The catcher then signals the pitch to the pitcher. K Cast is secure and enables you to effortlessly send pitches to your catcher without having to use cumbersome signs or codes that can be stolen by overzealous coaches with too much time on their hands. Tips: - Make sure your phone is not muted and the volume is at a reasonable level. A muted phone will not speak the pitch or location to the catcher. - If you have multiple catchers, you can give each their own AirPod tip. - Put your phone in "Do Not Disturb" mode so any calls or texts don't disturb the catcher. - If you are using the Apple Watch app, you probably want to have the pitcher take it off between innings and put it on a portable charger so that it doesnt run low on battery while pitching.
Relay
This app provides competitive coaches with a silent and instant pitch communication system. It allows for seamless relay of pitch calls to the catcher while meticulously tracking every pitch outcome and game statistics. Enhance your coaching strategy with detailed game analysis and custom team management tools.
- Silent pitch calling via earbuds
- Complete game and pitch outcome tracking
- Detailed at-bat and session history
- Customizable pitch library
- Roster and opponent management
- Export game data to CSV
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Relay-9 is a complete pitch communication system designed for competitive coaches. Stop worrying about missed signs or stolen signals and start focusing on strategy. Our intuitive interface allows you to silently and instantly relay pitch calls while tracking the outcome. Key Features in This Version: • Silent Pitch Calling: Select a pitch type and location, and instantly relay the call to your catcher via audio through any standard earbuds. • Complete Game Tracking: ○ Log every pitch outcome: Ball, Strike, Foul, Hit, Out, or HBP. ○ Automatically tracks the current at-bat count (balls, strikes) and the inning's outs. ○ Maintains a running total of all pitches, balls, and strikes for the entire session. • Full At-Bat History: View a detailed pitch-by-pitch sequence for the current batter, including type, location, and outcome. • Custom Team Management: ○ Create and manage your roster of pitchers. ○ Maintain a list of opponents. ○ Fully customize your pitch library—add, edit, or delete pitch types to match your team's terminology. • Comprehensive Session History: ○ Automatically save every game session with detailed stats. ○ Review past games with a full pitch-by-pitch log. ○ Select specific sessions to delete or export. • Powerful Data Export: ○ Select one or more saved sessions and export them to a CSV file. ○ Analyze your game data in Excel or other spreadsheet software with detailed columns for Pitcher, Opponent, Date, Pitch #, Type, Location, and Outcome. Relay-9 gives you the data and communication tools you need to take your coaching to the next level. Welcome to the future of the dugout. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Relay at Free against K Cast's $3.99. Relay also leads on rating (5.0 vs 4.6) and iOS requirement (15.1 vs 17.0). K Cast's advantage is in-app purchases (none vs 4) and chart position (#40 vs unranked). On review sentiment, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Relay is free to download; K Cast costs $3.99 up front. Relay sells 4 in-app purchases, starting at $9.99 per month. K Cast asks for nothing beyond the download.
Relay holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
K Cast ships an update every 2 weeks, Relay every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | K Cast | Relay |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.6 (7 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 7 — better | 3 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Best chart rank | #40 — better | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Randal Haehnel | EightyOne18 |
Customer experience
K Cast
Relay
In-app purchases
K Cast
No in-app purchases
Relay
- Monthly Plan14 Days trial$9.991 Month
- Pro Plus Monthly Plan14 Days trial$19.991 Month
- Annual Plan14 Days trial$99.991 Year
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- Pro Plus Annual Plan14 Days trial$199.991 Year









