LIVING TAPES
Reactive Calculation Tapes
Say goodbye to ephemeral single-line displays. Each tape keeps your numbers, formulas, and notes together, updating totals in real time as you adjust entries.
Crafted for iPhone & iPad · Coming Soon
Calculations that breathe. Clarity in every tape.
Rowen replaces static calculators and bloated spreadsheets with tactile, living calculation tapes for iPhone & iPad. Adjust variables with intuitive steppers, track your numbers, and experience a new standard of mathematical clarity.
Living Calculation Tapes·Tactile Steppers & Controls·Curated Smart Templates·Native iOS Widgets
INTUITIVE & TACTILE
Designed for the way you actually calculate.
No rigid single-line displays. No spreadsheet complexity. Just flowing calculation tapes crafted for iPhone & iPad.
TACTILE CONTROLS
Interactive Steppers & Variables
Tweak rates, quantities, and percentages instantly with responsive ± stepper buttons and haptic feedback. Test scenarios on the fly without retyping numbers.
FLEXIBLE MATH
Smart Formulas & Running Ledgers
Switch effortlessly between dynamic formula synthesis (ƒ) and cumulative running balances (Σ). Assign custom units like currency, hours, kg, or km.
SMART TEMPLATES
Ready-to-Use Calculation Hub
Jumpstart daily math with built-in templates for coffee brew ratios, fuel dynamics, freelance rates, and split bills—or create custom templates tailored to your rhythm.
GLANCEABLE WIDGETS
WidgetKit & Spotlight Shelf
Pin your priority calculation tapes to your Home Screen and Lock Screen. Keep vital totals and quick entries at your fingertips without even opening the app.
VISUAL HISTORY
Visual Trends & Tape History
Understand your patterns over time with built-in trendlines, distribution sparklines, and complete tape history—all without wrestling with spreadsheet formulas.