777tk RegisTool app for iPhone and iPad

This app is a versatile utility tool designed to provide users with a range of calculation and conversion functionalities. It includes the following features:

Calculation Modules:

Area Calculator: Allows users to input length and width values to calculate the area in square meters.
Volume Calculator: Enables users to enter length, width, and height to calculate the volume in cubic meters.
Speed Calculator: Calculates speed based on entered distance and time.
Weight Calculator: Computes weight by multiplying mass and gravitational acceleration.
Time Calculator: Helps users add hours and minutes to a selected start time.
Temperature Converter: Converts between Celsius and Fahrenheit with a simple toggle.
Currency Converter: Converts amounts between USD and CNY, with automatic exchange rate adjustments.
User Interaction and Accessibility:

Copy Results: All calculators and converters include a "Copy" button that allows users to quickly copy results to their clipboard for easy sharing or further use.
Input Validation: Each calculator includes checks to ensure the entered values are valid, with feedback prompts if inputs are missing or incorrect.
Feedback Section: Provides a dedicated screen for users to submit feedback. The feedback form has a placeholder text, a character limit, and shows a success message when feedback is submitted.