30日プランクチャレンジ！

A focused core training app built around a 30-day plank challenge. Strengthen your abs, back, and posture at home in minutes a day with guided timers, clear form cues, and smart progress tracking. Ideal for busy users seeking a simple, effective home workout. Keywords include 30-day plank challenge, core workout, home fitness, plank workout app, fitness tracker. Core features - Progressive 30-day plan with auto timers, rest days, and clear form guidance - Personalized levels and reminders to fit beginner, intermediate, or advanced goals - Progress tracking with streaks, charts, and calories estimate to keep you motivated

1. Download and open the app, create an account or continue as a guest, then choose your fitness level and preferred reminder time. 2. Start Day 1 and follow the on-screen timer for each plank interval while using the form guide to maintain proper posture. 3. Finish the session and the app will auto log your result; review streaks, time held, and estimated calories on the dashboard. 4. Adjust duration, sets, or rest days in Settings to match your schedule, and enable notifications to stay consistent. 5. As you progress, explore advanced variations like side plank or forearm to extended transitions to keep training challenging.