PracticePocket vs Snubline

PracticePocket is a private practice notebook for musicians, athletes, language learners, makers, and anyone improving a repeatable skill. Build a drill around one purpose and one observable cue. Run a focused practice block with a real timer, record repetitions and focus, then keep a short note about what changed. PracticePocket turns those records into a useful review queue and clear practice trends without accounts, subscriptions, or online services. FOCUSED PRACTICE - Create drills with a purpose, cue, duration, and repetition target. - Run timed blocks with pause, resume, and finish controls. - Record actual time, repetitions, focus, outcome, and notes. ADAPTIVE REVIEW - See exactly which drills are due. - Rate recall as Repeat Soon, Held, or Effortless. - Use a transparent SM-2-style schedule that returns difficult material sooner. USEFUL HISTORY - Review 14-day or 30-day practice volume. - Compare minutes by discipline and session outcome. - Track optional weekly minute and session targets. - Search and filter the complete drill library. PORTABLE AND PRIVATE - Export a complete JSON archive and restore it later. - Share a factual text summary when you choose. - Keep drills, sessions, targets, and review dates on your device. - No sign-in, ads, analytics, tracking, or subscription. PracticePocket organizes information you enter. It does not provide coaching, medical advice, certification, or performance guarantees.

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 - Fall factors above 2 are limited to 2, with a visible warning; the result no longer represents the full entered drop.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