Calcusaur

Calculator that evaluates input using the order of operations. You can type on it with a keyboard. Like most of my apps the install size is under half a megabyte. Precision: 32 digits

Features
• Evaluates using the order of operations
• Works with keyboards
• Simple all-buttons interface (no swiping or hidden functions.)
• Extra calculator buttons: sin, cos, tan, ln, log, π, e, !, ^, √, and ()
• Records history
• 5 theme choices: Auto, Dark, Light, Black Out, and Light Amber
• More customization settings

Try the Lite Version
https://play.google.com/store/apps/details?id=com.grantojanen.calculatorlite

More Details
Offline: Yes
Lightweight: Yes, < 1MB
Multi-Window Support: Yes
Descriptor: basic calculator