SportLab is a lightweight tool for fast calculations around sports numbers.
Enter an amount and a decimal ratio to instantly see the result and the difference. Save multiple entries, review them later, and keep everything tidy in one place. Works fully offline and never asks for an account.

Instant calculations - amount × ratio with live preview

Smart summary - switch Totals / Averages / Median with a tap

Inline validation - clear hints if inputs are not valid

Organized list - add, undo, delete, and revisit past entries

JSON export - long-press the title to share your list as JSON

Clear overview - compact summary chip for current results

Fully offline - no sign-in, no ads, no background activity

Privacy

Local data storage only

No tracking, no analytics, no personal accounts

Notes

For information and education purposes

No real-money features or external services

Does not provide training plans, medical advice, or health tracking