Free tools
Run the numbers on your academy.
Free calculators for coaches and academy owners. No signup.
Sports academy management, by the numbers
Running a sports academy is part coaching and part small business. Most owners we meet in India price their batches by looking at the academy down the road, rent courts by the hour without knowing how many hours sit empty, and lose evenings to WhatsApp messages and fee reminders. These free tools put real numbers on each of those decisions in under a minute.
The fee calculator turns your coach salaries, court rent and other costs into a monthly fee per player, with the profit you want built in. The court revenue calculator shows what empty court hours cost you every month and what 70% booked would bring in. The admin time calculator adds up the hours spent on schedules and chasing fees, and what that time is worth. The academy scorecard asks 10 quick questions about schedule, fees, players and growth and gives you a score out of 100 with your three biggest fixes.
Every tool runs in your browser, works on a phone at the court and needs no signup. Share a result with your partner or coach with one tap: the link opens the same numbers.
Common questions
Are these tools really free?
Yes. Every calculator and the scorecard are free to use as often as you like, with no signup and no card.
Do you save my numbers?
No. The calculator runs in your browser and your numbers stay on your device. Nothing is sent to Instring unless you choose to email yourself the report.
Which sports are they for?
They are built for tennis, pickleball and badminton academies and coaches, and the maths works for any sport where you pay for coaches and courts.
Can I share a result?
Yes. Tap Share on any result. The link carries your numbers, so it opens the same result for whoever you send it to.
Less admin.
More court time.
Instring runs your schedule, fees and players in one app. 30 days free, no card.