Snubline vs Evthi

Explore rigging physics with an educational model. Snubline uses assumed inputs to illustrate equations and compare numerical values. It has no independent professional validation or complete rope calibration dataset. It is not a professional planning or load-safety assessment tool. Do not use its results to select equipment, determine actual loads, plan a cut, or decide whether an operation may proceed. Obtain qualified on-site assessment independently of the app. THE EDUCATIONAL MODEL - Compare snubbed and constant-slip let-run assumptions using a closed-form spring-mass equation. - Inspect peak tension, dynamic load factor, stretch, block force and device force, with equation details. - The rope conversion factor 0.075 and example moduli are provisional teaching values. - The 75%-125% display range is illustrative, not a validated error bound or confidence interval. Actual loads may fall outside it. - Fall factors above 2 are limited to 2, with a visible warning; the result no longer represents the full entered drop. NUMERICAL FORCE-VERSUS-RATING COMPARISONS Enter your own tag ratings and design factors. Within WLL, Approaching WLL, Exceeds WLL and Exceeds MBS describe numerical comparisons of model values only. They do not approve equipment or operations. EXAMPLES AND DOCUMENTS Estimate log weights from idealized geometry and species density, with estimate labels carried into comparisons. Save scenarios, gear records and jobs. Compare scenarios and share educational comparison PDFs or images. Existing frozen snapshots remain stored; documents rendered by this version carry the current educational restriction. TRANSPARENCY The free model page explains equations, provisional calibration, formula-test limitations and omitted effects including swing, tree flex, rope heating, friction variation and fatigue. Climbing, life support and crane operations are outside the model. YOUR DATA Records remain on your device. No account or cloud sync. If saved records cannot be opened, recording is paused and existing database and attachment files are kept. FREE Both model modes, equation details, the weight estimator, the model page, three Gear Locker items and one job. PRO Unlimited Gear Locker items and jobs, what-if comparisons, PDFs and share cards, custom rope profiles and widgets. Pro does not change model validity or calculation correctness. Choose a one-time Lifetime purchase or annual subscription. Existing monthly subscribers retain access while their Apple-verified entitlement is active. Any trial applies only when Apple confirms eligibility; the purchase screen shows the actual price and offer. Subscriptions renew unless cancelled in Apple subscription settings before renewal. Privacy Policy: https://app-legal-pages.vercel.app/snubline/privacy Terms of Service: https://app-legal-pages.vercel.app/snubline/terms

Evthi brings the scattered pieces of your life together in one place: notes, money, documents, reminders and projects. And all of it stays only on your phone, encrypted. EVERYTHING IN ONE PLACE • Notes: Headings, lists, to-dos, tables and images; add voice notes, locations and reminders. Scan text from paper with your camera and drop it into a note. • Finance: Track income and expenses, sort them into categories, set budgets, and keep an eye on subscriptions and recurring payments. Get a heads-up when you reach 80% of a budget. • Documents: IDs, contracts, invoices, warranties… Scan with your camera and edges are cropped automatically; even the text inside scanned documents shows up in search. Get reminded before expiry and renewal dates. • Reminders: Tasks with due dates, recurring chores, and one-tap "Done" or "Snooze" right from the notification. • Projects: Bring notes, expenses, documents and tasks together under one project. • Inventory: Keep your belongings, their photos and warranty periods. • Calendar and search: All your records in one calendar, one search. • Quick Capture: Type what's on your mind; Evthi prepares it as an expense, a reminder or a note, and you save it with one tap. • And more: goals, loans and debts, and Digital Memory. BY YOUR SIDE EVERY DAY • Morning summary: today's reminders, upcoming payments and documents about to expire, in one notification each morning. • Home Screen and Lock Screen widgets and a Control Center button: add something in one tap without opening the app. PRIVACY COMES FIRST • Your data is stored on your phone, encrypted with AES-256. • No account needed; we never ask for your email. • No ads, no tracking, no data collection. • Scanning and text recognition happen on your phone; no image is ever sent to the internet. • App lock with Face ID or PIN; hidden notes and a hidden Wallet section. YOUR DATA IS YOURS • Create a single-file backup, protect it with a password if you like, and restore it on a new phone. • Export notes as PDF and finance records as Excel or CSV, including loans, subscriptions, budgets and goals. SIMPLE AND CLEAR Evthi doesn't bury you in settings: open it, type, find it. Dark mode and 7 languages (English, Turkish, German, French, Russian, Japanese, Chinese). Evthi is designed for iPhone. One-time purchase. No ads. Questions or ideas? Write to info@evthi.com.