String GOAT is the all-in-one tennis string tracker for players and stringers. Your tennis strings lose tension every day, and String GOAT tells you when it's time to restring. Log every restring, track your tennis sessions with Apple Watch or Galaxy Watch, watch your string's predicted lifespan, and get AI string recommendations built on your own play data.

Record on your watch, analyze on your phone, manage on the web. From Apple Watch and Galaxy Watch to the web dashboard, your entire tennis stringing workflow flows seamlessly across devices.

Built for tennis players who notice a single pound of tension, home stringers who string their own rackets, and coaches and stringers who manage more than one.

KEY FEATURES

■ Apple Watch & Galaxy Watch
• Start a session right from your watch, with stroke count, heart rate, and calories tracked automatically
• GPS route and distance for outdoor sessions
• Sessions save to your phone automatically, even when you finish offline

■ Know When to Restring
• Predicted string lifespan based on your actual play time
• Replacement reminders driven by real usage, not just the calendar
• Home screen widget shows string status and replacement urgency at a glance

■ Workout Journal
• Session list, details, and calendar view
• Heart rate zones and session statistics
• Share cards with your own photos

■ String & Racket Management
• Full racket specs: brand, model, head size, weight, swingweight, balance, grip size, stiffness (RA)
• String setup: brand, model, type, shape, tension, gauge
• Hybrid stringing support (separate mains & crosses)
• Stringing details like knots and pre-stretch
• Racket detail page with per-racket string history and stats

■ Performance Feedback
• Rate 6 key areas: Power, Spin, Control, Comfort, Feel, Durability
• Add detailed comments for each category
• Share your feedback as images on social media

■ Tension & Statistics
• Record tension measurements and see how your strings decline over time
• Tension history graph (mains vs. crosses)
• String type distribution and per-racket analysis

■ AI String Lab
• AI string recommendations based on your records and feedback
• Hybrid string combo suggestions
• Tension advisor tailored to your stringing history
• AI chat for personalized stringing advice

■ Cloud Sync & Backup
• Sync across devices, with web dashboard access
• Cloud backup and restore
• Export your records to Excel

■ 13 Languages Supported
English, Korean, Japanese, Chinese (Traditional & Simplified), German, Spanish, French, Italian, Portuguese, Turkish, Hindi, Indonesian

Whether you are a tennis player logging every restring, a home stringer tuning string tension on your own racket, or a stringer managing racket and string setups for many customers, String GOAT keeps your tennis stringing history in one place. It works as a tennis string tracker, a string tension tracker, a racket and stringing log, and an AI-powered string recommendation tool, on your phone, your smartwatch, and the web.

SUBSCRIPTION PLANS

• Free: 1 racket, unlimited string records, 10 AI analyses/month
• Pro: AI string recommendations & insights, 500 AI analyses/month, unlimited Apple & Galaxy Watch tracking, unlimited rackets, cloud sync, web dashboard
• Premium: Customer management on the web, per-customer racket & string history, 3,000 AI analyses/month, everything in Pro

Subscriptions are billed monthly or yearly. Payment is charged to your Google Play account. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period.