NibbleCalc: Dev Calculator

NibbleCalc is the all-in-one calculator for developers, designers, and power users — a clean, fast calculator plus a full toolbox, all offline.

FOUR-FUNCTION & SCIENTIFIC
• Beautiful standard calculator with calculation history
• Full scientific panel in landscape (trig, logs, powers, roots, factorial)

PROGRAMMER
• HEX / DEC / OCT / BIN, live side by side
• Bit widths from 8-bit up to 127-bit
• Flip individual bits in an interactive bit grid
• AND, OR, XOR, NOT and shifts

COLOR TOOLS
• Convert HEX, RGB, HSV, HSL and CMYK
• Copy ready-to-use CSS, SwiftUI and UIKit code
• Color Scan: pick real-world colors with your camera
• WCAG contrast-ratio checker

DEVELOPER TOOLS
• JWT decoder — header, payload and claims, fully offline
• MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes
• UUID v4 generator
• Base64 encode / decode (URL-safe too)

DATE & TIME
• Date calculator — add, subtract, days between
• Unix timestamp converter — ISO 8601, RFC 2822, UTC and local

MADE TO ENJOY
• Three themes: Dark, Vibrant, Minimal
• iPhone & iPad, portrait and landscape
• 17 languages
• Works entirely offline — your data never leaves your device

NibbleCalc Pro (one-time purchase)
• Remove ads
• Unlock Dev Tools, Color Scan, 127-bit width and premium themes

Download NibbleCalc and carry a whole developer toolbox in one calculator.