iPhone Giveaway of the Day - Percentage Calculator Tool-%

This application includes 30 types of percentage calculation, which can help you quickly solve various percentage - related problems in life and work, and the calculation results can be traced and managed.

3 calculation types:
Basic calculation: percentage of value, percentage increase/decrease, conversion between percentage and decimal
Advanced calculation: reverse calculation of original value, compound growth, profit margin, return on investment
Practical scenarios: discounted price including tax, loan interest, statistics of grades/votes/market share, error rate, etc.

Main functions:
Quick calculation of daily percentage problems
No network dependency, all calculations and records are stored locally.
Automatic verification of input validity (e.g., prompt for non - numeric input).
Supports two decimal places and handles complex calculations such as compound growth.

History management:
Automatically save each calculation result
Support deleting a single record or clearing all at once
Display calculation details (e.g., "Input: 100 | 10%, Result: 110")

Real - time example guidance:
Each calculation type is provided with example explanations (e.g., "Example: What is 100 increased by 10% → Result: 110")

What can it do for you?
Discounted price of goods (original price 100, 20% off = 80)
Calculate profit margin (revenue 150, cost 100 = 33.33%)
Return on investment (profit 50, cost 100 = 50%)
And many more calculation scenarios