12C vs Borderly

The 12c Modern is a complete reimplementation of the full functionality of the classic HP 12c financial calculator. In addition to providing 12c's look & feel and functionality, we have modernized the app with features such as recipes, interactive prompts, and register views. This free version provides basic Calculator functions, Math functions, Percentage, Calendar and Memory functions. A one-time In-App-Purchase is required to access the Time-Value-of-Money (TVM), Cash Flow, Amortization, Bond, Depreciation, and Statistics functions. The 12c modern addresses two critical issues for the user: (i) knowing what is stored in each of the calculator's internal registers, (ii) remembering the exact key sequences for getting specific calculations done. The register views, accessible in the main screen, provides visibility into various register groups. You can switch between different groups of registers (such as Financial, Cash Flow, Bond, etc.), and inspect stored values. You can record your key strokes for specific calculations and store them as recipes. The recipes remove the burden of remembering the exact keystroke sequence for your tasks. You simply select a pre-recorded recipe (builtin or your own) and run. When running a recipe, the app visually prompts you with the keystrokes to press and guides you along in getting the results. The app comes with 20 built-in recipes and allows you to add/record/edit/delete your own recipes. The convenient register view on the screen allows you to view register contents as your operations proceed.

Track every day. Prove every day. Know exactly where you stand. WHY BORDERLY Most apps count days. Borderly counts days and timestamps them with the technology behind legal e-signatures already accepted in court. If a state tax auditor ever asks where you were on May 12th, you have the answer signed, sealed, and impossible to fabricate after the fact. AUTOMATIC TRACKING • GPS-based detection of state and province boundaries • All 50 U.S. states, every Canadian province, and every country • Offline jurisdiction resolution for U.S. states, no signal required • Battery-efficient: runs quietly in the background PHONE COMPANY RECORDS ON AUTOPILOT • Optional daily check-in call, so your phone carrier keeps its own record of the day • Miss it, and Borderly can call back EVIDENCE THAT HOLDS UP • Timestamps used by legal e-signatures (RFC 3161), available on every record • Professional-ready PDF reports • Verification links your auditor can open without an account, with an expiry and use limit you set GOALS THAT MATCH REAL TAX RULES • Choose how your days count, with rules recommended by real tax professionals • Minimum-day goals (e.g., "183 days in Florida") • Maximum-day limits (e.g., "Under 30 days in New York") • Ratio, target, percentage, and domicile goals • Smart alerts before you cross a threshold PLAN AHEAD - WHERE YOU STAND AT A GLANCE • See your year on a map, plus Home Screen and Lock Screen widgets • Scenario planning with a tap-and-drag to paint calendar • Model future trips against your goals • See projected year-end totals blending actual + planned days • Switch between scenarios without losing your tracked data EVIDENCE VAULT • Upload receipts, boarding passes, photos, and supporting documents • Tied to specific days and jurisdictions • Add documents straight from the camera BUILT FOR YOU AND YOUR ADVISOR • Share read-only access with your CPA or tax attorney • Bring your professional onto Borderly - professional portal access is free for them • Generate audit-ready PDF reports, spreadsheets, and CSV exports in seconds YOUR DATA, YOUR CONTROL • Our business is built on trust, and we take that duty seriously • Your data is yours. You decide who sees it and what they can do with it • Scoped sharing for your CPA, attorney, or auditor, revocable anytime • Encrypted in transit and at rest, with an audit log of every access you share • We don't sell your personal data or share it with data brokers - it wouldn't sit right with us WHO USES BORDERLY • High-net-worth individuals changing domicile • Snowbirds splitting time between high- and low-tax states • Remote workers, expats, and digital nomads • Canadian snowbirds tracking Form 8840 days • Tax attorneys, CPAs, and firms managing multi-state clients SUBSCRIPTION Borderly is free to download. New accounts get a 60-day Certify trial with no credit card required. Subscribe to unlock and keep advanced features: • Protect: automatic tracking, scenario planning, scoped advisor sharing • Certify: everything in Protect, plus cryptographic timestamps, daily check-in calls, personal Evidence Vault, and audit-ready records • Anchor: everything in Certify, plus blockchain anchoring for maximum proof Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in iPhone Settings > Apple ID > Subscriptions. Pricing and tiers are shown in-app and may vary by region. SUPPORT Questions, feedback, or audit help? Email support@borderly.day or visit borderly.day/help for guides on tracking, goals, and domicile. Privacy Policy: https://borderly.day/privacy Terms of Use: https://borderly.day/terms