LineupOS gives youth baseball coaches a fast, clear way to build fair lineups, track pitch counts, and print dugout cards — without the spreadsheet chaos.
Four fresh updates built from beta coach feedback. All live in the app right now.
One-click export of your dugout card to a clean, single-page PDF. Share it with your assistant coaches or save it for your records — no screenshots, no printing required.
Record each player's favorite positions and your own best-fit assessment. Toggle pitching and catching willingness. A quick look at the roster tells you who wants the ball and where everyone fits.
Snap a picture of your roster from any other app or paper list, upload it, and LineupOS extracts the players for you. Processing happens on your device — no roster data leaves your browser.
Bring your whole season's game schedule in with a single .ics calendar file from GameChanger or Google Calendar. Skip the manual game-by-game entry and get straight to building lineups.
Built with direct input from beta coaches. Got feedback on these or an idea for what to build next? Let us know on Reddit.
From roster setup to printed dugout cards — LineupOS handles the details so you can coach the game.
Drag and drop batting order. Assign positions inning-by-inning in seconds.
Protecting young arms is non-negotiable. LineupOS automatically enforces pitch limits and rest rules based on your team's age group, so you never have to cross-reference a separate chart mid-game. Ineligible pitchers are flagged before you make a mistake. Custom rules are supported for leagues with their own thresholds.
One tap to a print-ready lineup card that fits a single sheet.
Learn how to set up your roster, build fair lineups, track pitch counts, and print dugout cards — all in under 5 minutes.
LineupOS is in active development. Features currently in beta are focused on youth baseball. Here's what we're building next.
Log pitches from the dugout during live games, with instant eligibility updates.
Softball-style lineups work today with 10-player defense, but softball-specific pitching and rest rules are not yet enforced.
Enable 10-player defense in Team Settings to use LF, LC, RC, RF outfield positions with full inning-by-inning tracking.
Save your dugout card as a clean, shareable PDF in one click — straight from the Dugout Card view.
Track each player's favorite positions plus your own coach's assessment, with pitch/catch willingness toggles shown right on the roster.
Upload a screenshot of your roster and LineupOS extracts the players automatically — all processing happens on your device for privacy.
Import your season schedule from a .ics calendar file (GameChanger and Google Calendar confirmed — other calendars may work but aren't yet tested).
For leagues that don't play with a pitcher, catcher, or other positions — toggle skipped positions in Team Settings and they'll be excluded from validation and the lineup builder.
Change innings scheduled after a game is created. Adding innings extends the alignment grid; reducing them trims cleanly, with innings played auto-clamped.
Future games auto-populate the batting order from your most recently played game — so a schedule imported in March stays fresh in July. Manual edits to a specific game stick.
Removing a player now triggers a clear warning that they'll be wiped from every game they appear in — played or unplayed — so you never lose data by accident.
Automated text alerts to parents when their child has pitched, with rest day reminders.
A dedicated iOS and Android app for managing lineups and tracking pitches from the field.
Seamless data flow between LineupOS and the apps you may already be using — import rosters, sync game data, and eliminate double entry.
Substitution tracking, playing time balancing, and rotation management built for youth basketball coaches.
Line management, shift tracking, and fair ice time tools designed for youth hockey coaches.
* LineupOS is currently in public beta. Features listed as "Planned" or "Exploring" are not yet available and are subject to change. Beta users may encounter bugs or incomplete features. We appreciate your feedback as we build.
Free to use during beta. No credit card required. Optimized for desktop — mobile support coming soon.
Create a free account
Sign in to your LineupOS account.
LineupOS started as a spreadsheet that tracked lineups, pitch counts, and playing time for a competitive travel team. Coaches and parents loved it — but nobody else knew how to use it. It was too complex. So we turned it into something every coach can pick up in minutes.
Every youth coach faces the same pregame scramble: 12 kids, mandatory playing time, pitch count rules, and a game starting in 10 minutes. Who sat last game? Who's eligible to pitch? Is everyone getting a fair shot?
Paper lineups get lost. Spreadsheets break on phones. And pitch count mistakes don't just cost you a game — they put a young arm at risk. Kids' bodies are still developing, and overuse injuries at the youth level can cause lasting damage. There's no excuse for getting this wrong.
LineupOS tracks every bench inning in real time so you can see exactly who needs more playing time. It enforces pitch count rules automatically so you never have to check a separate source or do mental math in the middle of an inning. The tool makes the decisions simple — you just coach.
Every kid deserves equal playing time, and every young arm deserves protection. Those aren't just league rules — they're the right thing to do. LineupOS exists to make sure no coach has to choose between winning and doing right by their players.
We built this tool because we've been in that dugout. We've seen the stress of trying to balance competitive lineups with fairness, pitch limits with playoff pressure. The coaches who care enough to worry about it are exactly the ones who deserve a tool that handles it for them.
LineupOS is in active development and we're building based on feedback from real coaches. Everything we add comes back to one question: does this help the coach take better care of their kids?
Every feature is designed for the person with a clipboard in a dusty dugout — not a front-office analyst.
Overuse injuries at the youth level can end a kid's baseball career before it starts. Pitch count enforcement isn't optional — it's the most important thing a coach can get right.
Real-time bench inning tracking means you always know who needs more time on the field. Fair lineups shouldn't require a math degree.
Free during the beta period. Help us build the right tool by using it and telling us what's missing.
Get started free Watch tutorialPlease read these terms carefully before using LineupOS. By creating an account or using the service, you agree to be bound by these terms.
Effective date: April 16, 2026 | Last updated: April 16, 2026
By accessing or using LineupOS ("the Service"), operated by LineupOS ("we," "us," or "our"), you agree to these Terms of Service ("Terms"). If you do not agree, do not use the Service. If you are accepting these Terms on behalf of a youth sports organization or league, you represent that you have authority to bind that organization.
LineupOS is a web-based lineup management tool designed for youth baseball and softball coaches. The Service enables coaches to manage team rosters, build game lineups, track pitch counts, enforce league pitching rules, and generate printable dugout cards.
LineupOS is currently in public beta. Features may be added, modified, or removed at any time without notice. We make no guarantee of uptime or feature availability during the beta period.
You must be at least 18 years of age to create a LineupOS account. The Service is designed for use by adult coaches, team managers, and league administrators — not by children directly. Only adults may create accounts and enter data into the Service.
You are responsible for maintaining the confidentiality of your account credentials and for all activity that occurs under your account.
LineupOS is not directed to children under 13. Children do not create accounts or interact with the Service directly. However, we recognize that coaches enter limited information about minor players (first name, last name, jersey number, positions, and pitch counts) in order to use the Service.
By entering player information into LineupOS, you represent and warrant that:
If a parent or guardian contacts us to request access to, correction of, or deletion of their child's data, we will comply promptly. See our Privacy Policy for details.
You agree to use LineupOS only for its intended purpose: managing youth sports team lineups and related coaching activities. You may not:
You retain ownership of all roster data, lineup data, and other content you enter into LineupOS. We do not claim any intellectual property rights over your content.
You may export your data at any time using the backup feature in Settings. If you delete your account, we will delete your data from our active systems within 30 days, except as required by law or as described in our Privacy Policy.
LineupOS is provided in beta on an "as is" and "as available" basis. During the beta period, the Service is provided free of charge. We reserve the right to introduce pricing, modify features, or discontinue the Service at any time.
We will make reasonable efforts to notify users of material changes via the email address associated with their account.
To the fullest extent permitted by law, LineupOS and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages, including but not limited to loss of data, loss of use, or any errors in pitch count calculations, lineup configurations, or rule enforcement.
LineupOS is a coaching aid, not an official scorekeeping or league compliance system. Coaches are ultimately responsible for verifying pitch counts and league rule compliance independently.
You agree to indemnify and hold harmless LineupOS and its operators from any claims, damages, or expenses arising from your use of the Service, your violation of these Terms, or your failure to obtain required parental consent for player data you enter.
We may suspend or terminate your access to the Service at any time for violation of these Terms or for any other reason, with or without notice. You may delete your account at any time by contacting us at jayredbee21@gmail.com.
We may update these Terms from time to time. If we make material changes, we will notify you by email or by posting a notice within the Service. Your continued use of the Service after changes take effect constitutes acceptance of the revised Terms.
These Terms are governed by the laws of the State of Minnesota, United States, without regard to conflict of law principles. Any disputes shall be resolved in the state or federal courts located in Hennepin County, Minnesota.
Questions about these Terms? Email us at jayredbee21@gmail.com.
This policy explains what information we collect, how we use it, and your rights — including specific protections for children's data under COPPA.
Effective date: April 16, 2026 | Last updated: April 16, 2026
LineupOS is a web-based lineup management tool for youth baseball and softball coaches, operated from Minneapolis, Minnesota. When this policy says "we," "us," or "our," it refers to LineupOS and its operators.
When you create an account, we collect:
Coaches enter limited information about their players to build lineups:
We do not collect dates of birth, home addresses, phone numbers, photos, school information, or any biometric data about players. We collect the minimum information necessary for lineup management.
We use Google Analytics to understand how the Service is used in aggregate. This may collect:
Google Analytics data is aggregated and not linked to individual player records. We do not use Google Analytics to track or profile children.
LineupOS offers an optional feature to import roster data from screenshots. When you use this feature, the image is processed entirely on your device using client-side OCR technology (Tesseract.js). The screenshot is never uploaded to our servers or any third-party service.
We use the information we collect solely to:
We do not sell, rent, or share personal information with third parties for marketing or advertising purposes. We do not serve ads. We do not use player data for any purpose other than providing the Service to the coach who entered it.
We comply with the Children's Online Privacy Protection Act (COPPA). Here is how:
The Service is designed for and marketed to adult coaches, team managers, and league administrators. Only adults (age 18+) may create accounts. Children do not access, interact with, or create accounts on LineupOS.
The only information about child players stored in LineupOS is what the coach enters: first name, optional last name, jersey number, position assignments, and pitch counts. We do not collect contact information, photos, precise location, or persistent identifiers from or about children.
Coaches who enter player data into LineupOS represent that they have obtained consent from the player's parent or legal guardian, consistent with how youth sports organizations typically authorize coaches to manage team rosters. This follows the approach recognized by the FTC for youth sports platforms where the coach or organization acts as an intermediary with parental authorization.
Parents and legal guardians have the right to:
To exercise any of these rights, contact us at jayredbee21@gmail.com. We will respond within 30 days. We may ask for verification of your identity and your relationship to the child.
If a parent withdraws consent, the coach will be required to remove the child's data from their roster. If the coach does not act, we will delete the data upon the parent's verified request.
Your data is stored securely using Google Firebase / Firestore, hosted on Google Cloud Platform infrastructure in the United States. Firebase provides:
While no system is 100% secure, we take reasonable measures to protect your data and follow industry-standard practices. We limit access to personal data to only those who need it to operate the Service.
We retain your account data and associated roster data for as long as your account is active. You may export your data at any time using the backup feature. If you delete your account or request deletion, we will remove your data from active systems within 30 days. Backup copies may persist in encrypted backups for up to 90 days before being purged.
We use the following third-party services:
We do not use advertising networks, social media tracking pixels, or any third-party services that would collect or profile children's data. We do not share player data with any third party.
LineupOS uses cookies set by Firebase for authentication purposes only. Google Analytics sets cookies for aggregated usage tracking. We do not use cookies for advertising or cross-site tracking. You can disable cookies in your browser settings, but this may prevent the Service from functioning correctly.
Depending on your jurisdiction, you may have the right to:
To exercise any of these rights, contact jayredbee21@gmail.com.
If you are a California resident, you have additional rights under the California Consumer Privacy Act (CCPA). We do not sell personal information. You may request a copy of or deletion of your data by contacting us at the email above.
If you are a resident of another U.S. state with consumer privacy legislation (e.g., Virginia, Colorado, Connecticut, Minnesota), you may have similar rights. Contact us and we will honor applicable requests regardless of your state.
We may update this Privacy Policy from time to time. If we make material changes — particularly any changes affecting how we handle children's data — we will notify you by email and update the "Last updated" date above. Your continued use of the Service after changes take effect constitutes acceptance of the revised policy.
If you have questions about this Privacy Policy, about how we handle children's data, or if you are a parent wishing to exercise your rights under COPPA, please contact:
LineupOS
Email: jayredbee21@gmail.com
Website: lineupos.com