HachiCalendar2 Pro vs HypotenuseCalc

Your faithful friend, making life more organized. 15 years, over 1 million users. Contact: hachi.iphone@gmail.com Scroll endlessly through your past and future. Turn events into checkable to-dos. AI helps you create and analyze events naturally. Floating cards keep countdowns and key dates always in view. Hachi Calendar combines Calendar + To-Do + AI Assistant + Floating Date Cards into one powerful, seamless interface. Browse vertically without switching views. Check off events like tasks. Let AI create, complete, and analyze your schedule. Supports Gregorian / Lunar calendars, seasonal terms, and traditional date references to help you plan smarter. ####Key Features Infinite Vertical Scrolling Browse past and future smoothly without switching pages. One-Page Operation Flow View, add, drag, copy, move, and complete — all on one screen. Events as To-Dos Mark events as completed and keep a record of progress. Integrated AI Assistant Create events from natural speech or text; AI parses times, reminders, repeats, and provides summaries, analytics, and free-time suggestions. Floating Countdown Cards Display countdowns, elapsed days, or key dates. Auto-highlights when deadlines approach. Time Insights & Analytics Discover active hours, time usage trends, and weekday/weekend differences. Quick Voice Input Long press to record → real-time transcription → release to create. Countdown indicator before recording ends. Smart Gap & Conflict Detection Detects available slots and prevents overlapping events. Key Dates Always Visible Floating cards + countdowns + quick jumps keep important days front and center. Emojis & Categories Add emojis and tags for quick visual identification. Multiple Reminders Standard alerts, countdown highlights, and completion feedback. Privacy First Local analytics only — no data uploaded. ####Typical Use Cases Say “Review meeting at 3 PM Friday, remind me 10 minutes before” → instantly created. Check off daily study or workout goals. Keep countdowns for exams, trips, or milestones visible. Ask AI for “next week’s free time” to schedule meetings. Review your time structure with automatic visual insights. Track lunar birthdays or seasonal events easily. ####Highlights True one-page vertical scrolling experience Events double as to-dos AI-powered creation, analysis, and scheduling suggestions Floating cards for countdowns & key dates Long-press voice input with dynamic countdown Supports Gregorian / Lunar / Solar Terms / Almanac Time usage insights and rhythm optimization Lightweight, fast, and information-dense ####Perfect For Users who want to manage schedules and tasks in one screen Heavy planners who love AI or quick voice entry Those who follow both modern and traditional calendars Anyone who needs countdowns and visual goal tracking People who want to analyze time usage to optimize their routines

You can automatically calculate the angle and length. 【mode 1】Shape of the triangle is fixed. 【mode 2】Figure also varies according to the size of the triangle. This is useful in the field of architecture and surveying, design .