FitZone

FitZone is a lightweight tool for quick 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

Quick paste - long-press inputs to paste only the number from clipboard

Copy result - long-press the result to copy the summary

Flexible rounding - tap the summary to switch 2 decimals or none

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

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