Add UI setting to exchange the position of the display panel and the legend

Add setting to keep mode upon restart the app

Fix the issue of value entry after pressing the engineering notation key followed by the negation key

Fix a display issue in the iPad device when bringing it back from the background or switching back from another app

Improve user experience in engineering mode

Add engineering mode to input number with SI unit

Add an option to display engineering notation with SI prefix

Fix minor UI issues of key tracking feature and static button feature

Add static button

1. Resolve integer overflow issues in some 13-digit mode computation 2. Resolve long wait time in factorial computation when the result has reached infinity

1. Add menu setting to swap Pi key and Equal key position 2. Add alert pop-up showing that the following menu setting will take effect after restart a. Switching between 10-digit and 13-digit display b. Switching between 2-exponent-digit and 3-exponent-digit display c. Swapping Pi key and Equal key position

Correct the segment font size of the minus sign in the iPad form factor

Optimize GUI when the device is in landscape mode

Add Kin and Kout indicators on the display

Add ALT indicator on the display

Enlarge the segment font on the display

Add an option to highlight the operator key for the purpose to track the operation

Add Segment font

1. Add an option to sort the formula menu by usage 2. Add a formula to calculate the cutoff frequency from the given RC 3. Add a formula to calculate the capacitance from the given current and the instantaneous change in voltage

Fix blinking effect in some iOS devices

Improve the app stability when the sound option is ON

1. Add option to enable 3 exponential digits display 2. Add function to copy and paste over the display 3. Add option to enable blinking feedback

1. Add home screen quick action "Copy Last Answer" 2. Add option to enable 13-digit display mode

Improve the number formatting when the iOS Locale is set to a European country

1. Add the option to enable comma as the decimal point 2. Add the option to enable thousand separator