Aruki

Product Introduction

1. Definition: Aruki is a minimalist iOS health and fitness application designed to coach users through the Japanese Interval Walking Training (IWT) method. It functions as a digital, audio-guided interval timer with integrated activity tracking.
2. Core Value Proposition: Aruki exists to provide a focused, subscription-free digital coach that enables users to practice the scientifically-backed Japanese walking method correctly, without distraction. Its primary value is delivering structured, mindful exercise that promotes cardiovascular health through simple, timed intervals, entirely from an iPhone.

Main Features

1. Guided Interval Protocol: The app automates the core 3-minute easy, 3-minute brisk walking interval cycle. It uses precise system timers to manage the entire session duration. A soft, non-intrusive auditory chime and a calm, recorded voice cue (e.g., "Brisk walk") signal every transition, eliminating the need for users to constantly check a clock.
2. Lock Screen Live Activity: Leveraging iOS's Live Activities API, Aruki displays a persistent, glanceable widget on the iPhone's Lock Screen and Dynamic Island. This visual indicator shows the current phase (e.g., "Easy Walk") and remaining time, allowing users to keep their phone in their pocket while maintaining awareness of their walk's progress.
3. Pro Feature Suite (One-time Purchase): The "Japanese Walking Pro" unlock adds advanced functionality: a Cadence Metronome that emits audible beats to help users maintain a target steps-per-minute pace; Custom Protocols allowing users to define their own interval durations and number of sets; and a Full Walk History with detailed metrics, persisting beyond the free version's 7-day retention.

Problems Solved

1. Pain Point: The difficulty of manually timing interval workouts leads to distraction, inconsistency, and abandonment of the protocol. Many fitness apps are overly complex, require subscriptions, or depend on additional hardware like an Apple Watch.
2. Target Audience: Individuals seeking a simple, evidence-based low-impact cardio routine; users interested in Japanese wellness practices; iPhone owners who want a dedicated walking coach without a monthly fee; people looking to reduce screen time during exercise.
3. Use Cases: A user starting their day with a structured 30-minute walk in the park; someone incorporating light interval training into their routine for metabolic health; a person seeking a mindful movement practice that doesn't require watching a screen or managing complex equipment.

Unique Advantages

1. Differentiation: Unlike subscription-based, generalized fitness apps (e.g., Strava, Nike Run Club) or basic timer apps, Aruki is hyper-specialized on one proven method. It requires no Apple Watch, account, or backend server, offering a one-time purchase model versus recurring subscriptions. Its design philosophy prioritizes calm and focus over gamification.
2. Key Innovation: The seamless integration of audio cues and a Lock Screen Live Activity creates a truly "eyes-up, phone-away" coaching experience. This technical implementation ensures guidance and feedback are delivered contextually without interrupting the physical activity or requiring device interaction.

Frequently Asked Questions (FAQ)

1. Do I need an Apple Watch to use Aruki? No, Aruki is designed to function completely independently on your iPhone. All coaching, timing, and lock screen features work without any Apple Watch.
2. What is the Japanese walking method for interval training? The Japanese Interval Walking Training (IWT) method involves alternating 3 minutes of slow walking with 3 minutes of fast walking. Research suggests this pattern is effective for improving cardio-metabolic health and physical fitness in adults.
3. Is Aruki a free walking app? Aruki offers the full guided interval walk experience for free. Advanced features like the cadence metronome, custom intervals, and full history require a one-time "Japanese Walking Pro" in-app purchase, with no subscription.
4. How does Aruki work with Apple Health? Aruki can optionally write your walking workout data (duration, active calories) to the Apple Health Kit framework. This allows your Aruki walks to contribute to your Health app rings and activity history.
5. Can I change the interval times in Aruki? Yes, customizing interval durations and the number of sets is a feature available in the "Japanese Walking Pro" version. The free version uses the standard 3-minute easy/3-minute brisk protocol.