Piano Tuner's Slide Rule vs ToolBox

Never again be confused by the partial series, coincident partials, or check notes. Piano Tuner's Interval Slide Rule will easily show you all those simply by sliding your finger around on the screen. - Use the partial series to know what notes to listen for when tuning unisons. - Use the coincident partial setting to know where to listen when tuning intervals. - Use the check note feature to know for sure which check notes you need to use to tune any interval pure or wide or narrow, depending on your tuning system.

ToolBox – The Ultimate All-in-One Utility App Experience over 25 versatile features in one app that simplifies your everyday life: • Dice – Virtual roll for quick decisions • Random Number – Generate random numbers in your desired range • Random Letter – Display a random letter • Live Clock – Always keep track of the current time • Date Difference – Calculate the number of days between two dates • Countdown – Set timers for events or tasks • Counter – Count clicks, steps, or other values • QR Code Generator – Create your own QR codes • Barcode Generator – Generate barcodes for various purposes • QR/Barcode Scanner – Quick scanning on the go • Color Picker – Choose precise colors for design projects • BMI Calculator – Calculate your body mass index • Coordinates – Determine your exact location • Air Pressure – Measure the current air pressure • Flashlight – Use your phone as a light source • Compass – Always find the right direction • Prime Number Checker – Check if a number is prime • Stopwatch – Precise timing for sports and events • Notes & Checklists – Organise your tasks efficiently • Speed Measurement – Record your speed • Periodic Table – Always have the periodic table of elements handy • Volume and Area Calculator – Calculate volumes and areas of various shapes • Unit Converter – Convert lengths, weights, temperatures, and more • Unicode Library – Easily search and copy special characters and symbols • Subscript and Superscript Text – Format numbers, formulas, or texts with style • Edit and Save Image Metadata – View and adjust the EXIF data of your photos • Shortcut Integration – Use ToolBox directly through iOS Shortcuts for maximum efficiency Widgets: • Counter • Random Letter • Dice ToolBox is practical, intuitive and versatile – perfect for everyday life, work and leisure.