KARL Business Day Calculator
Janosch Zimmer Productivity iPhoneiPadiPod touch
KARL Business Day Calculator is a free Productivity app for iPhone and iPad by Janosch Zimmer. Requires iOS 26.2. Updated February 19, 2026.
- Price
- Free
- on the App Store
- Size
- 1 MB
- Age 4+
- Updated
- Feb 19
- 2026 · v2.0
Screenshots
About KARL Business Day Calculator
KARL is the precise business day and deadline calculator for legal and financial workflows. Whether contract deadlines, settlement dates, or compliance deadlines - calculate business days reliably and document every step with full audit trace. For Lawyers, Bankers & Finance Professionals BUSINESS DAY CALCULATOR (T+N) Add or subtract N business days from a start date - non-business days are automatically skipped ROLL CONVENTIONS Adjust dates according to common market standards (Following, Preceding, Modified Following, Modified Preceding, Unadjusted) LEGAL DEADLINE CALCULATION Calculate statutory deadlines according to German law (BGB) with start rule, period (days/weeks/months/years), and optional business day adjustment COUNT BETWEEN Count business days between two dates - including or excluding boundaries CALENDAR OVERVIEW Visualize months/years with holiday lists and business/non-business marking per day AUDIT TRACE WITH PROOF Tabular documentation for each date with business day status, reason, and counter-check for plausibility verification EXPORT & SHARE Share reports as text, send via email, or copy directly to clipboard Supported Calendars: Germany (all federal states), UK Bank Holidays (England & Wales, Scotland, Northern Ireland), US Federal Holidays, TARGET2 (EU Payments) KARL doesn't just show you the result - it documents every calculation step. Perfect for contracts, compliance documentation, and when every day counts.
What’s new
Version 2.0 · Updated February 19, 2026
New Dark Mode enabled via the Info-section; Added Information content and Legal Deadline calculation can be done for all supported Calendars including. TARGET2 (EU), US and UK!
App privacy
The developer, Janosch Zimmer, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.