Ostracod Calculator is an ideal Apple Watch app for everyday number processing tasks.

Features:
• Large, easy to press buttons
• Buttons provide both haptic and visual feedback
• Toggle between two screens of buttons
• Big bold numeric display
• Secondary display showing previous number and selected operation
• Supports numbers up to 8 digits
• Addition, subtraction, multiplication, division, and exponentiation
• Copy (MC+) and paste (MR)