HIKYAKU - Keto Fasting Log
Ryosuke Hoshino Health & Fitness iPhoneiPadiPod touch
HIKYAKU - Keto Fasting Log is a free Health & Fitness app for iPhone and iPad by Ryosuke Hoshino. Requires iOS 18.0. Updated June 2, 2026.
- Price
- Free
- on the App Store
- Size
- 31 MB
- Age 12+
- Updated
- Jun 2
- 2026 · v2.1
Screenshots
About HIKYAKU - Keto Fasting Log
In old Edo, couriers ran with the sun. HIKYAKU brings that wisdom back to your daily eating. ■ Variable-Hour Time Sunrise to sunset is divided into six parts; sunset to sunrise into six more — the twelve Edo koku, computed in real time from your location. Each koku stretches and contracts with the season, so you design meals and fasting around true solar time. As each koku begins, a quiet "Note from the Koku" appears — blending Eastern medicine, circadian rhythm, and ketogenic science. ■ Four Keto Modes · Light Keto (carbs 50–100g, 12–14h fast) — beginners · Keto Body (carbs 20–50g, 16–18h fast) — daily practitioners · Town Courier (carbs 20–30g, 18–21h fast) — realistic strict keto · Express Courier (carbs under 20g, 20–23h fast) — therapeutic keto Snack schedule, carb guidance, and meal timing are computed automatically. ■ Precision Nutrition PFC Balance Enter your weight, height, age, sex, activity level, and goal. Personalized PFC (carbs/fat/protein) intake ranges are computed via the Mifflin-St Jeor TDEE formula, with today's intake visualized live. ■ Daily Score (out of 100) Snack 40 + Fasting 30 + Sleep 30 makes your practice visible. HealthKit auto-imports sleep and exercise data. ■ mTOR Cycling Each day is classified as mTOR-activated, suppressed, or neutral from your food patterns, with annual balance shown as a heatmap. Built on longevity research (Longo et al.) to support strategic cycling. The Library includes a detailed explanation with tappable PubMed citations. ■ Dining Out Mode A daily toggle that cancels scheduled snacks on dining-out days without penalty. Shows an evidence-based pre-meal damage-control protocol: apple cider vinegar, psyllium, protein preload, cinnamon, post-meal walk. ■ Tokaido 53-Station Challenge 514 km from Nihonbashi to Sanjo Bridge in Kyoto. Your last 30 days of scores translate into station progress. With 12 original landmark illustrations, daily keto becomes a journey. ■ Interactive Biochemistry Library TCA, methionine, and folate cycles, neurotransmitter metabolism, glutathione, biopterin — medical-school-level pathways rendered as interactive diagrams. Tap any enzyme to expand its cofactors and inhibitors. All citations are tappable links to PubMed. ■ Seasonal Events Special displays on the winter and summer solstice — feel the rhythm of the solar calendar. [Premium] · AI Daily & Weekly Reports (with mTOR history) · Meal Photo AI Analysis (with supplemental note integration) · Blood Test AI Report · Monthly Challenge Report · Weekly PubMed Digest (with notification) [90-Day Bootcamp] A serious 90-day program. Blood test on day 1, blood test again on day 90. In between, AI coaches you daily. If 4 of 7 blood markers meet criteria, you earn "Hikyaku Certification" — a 180-day-valid Tokaido passage permit. This app is not a medical device and is not a substitute for medical diagnosis or treatment. Consult a physician if you have health concerns. Terms of Service: https://hikyaku.app/terms Privacy Policy: https://hikyaku.app/privacy
What’s new
Version 2.1 · Updated June 2, 2026
Tokaido 53 Stations Redesign Your current station now takes center stage with a large illustration. Previous/next station buttons and a horizontal mini-map let you tap to any of the 54 stations. Non-landmark stations show "goshuin stamp" style placeholders with kanji numerals on washi-paper background, reinforcing the Edo aesthetic. Sleep Score Accuracy • Fixed inflated sleep totals (2-3x actual) caused by overlapping Apple Watch + iPhone HealthKit samples • "Fasting-friendly" beverages (hot water, herbal tea, sugar-free supplements) no longer affect the pre-bed score even within 2 hours of bedtime • Fixed cases where morning Daily Report showed previous night's data or projected meal times incorrectly Custom Snacks: Fasting-Friendly Toggle The "Add Custom Snack" form now includes a fasting-friendly toggle. Mark items like hot water or magnesium drinks to exclude them from pre-bed gap penalties. Beverages with total macros ≤3g are auto-detected. Auto-Mark "Eaten" on AI Analysis After meal photo AI analysis or adding via catalog, status is auto-set to "Eaten" — fixing the issue where AI analysis data was lost when saved with status left as "Pending". Improved Snack Scoring Removed the flat -5pt penalty on extra snacks. Scoring now relies purely on AI-detected carbs. Tap any added snack to see details. Other Improvements • Omega-3:6 "Good" threshold relaxed from 4:1 to 5:1 (accounting for AI estimation precision) • Dining-out mode capped at 3 days/month for full snack score; 4th+ count as 0 (prevents gaming) • Fixed CSV export breaking custom snack names containing commas
App privacy
The developer, Ryosuke Hoshino, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
- Usage Data: Product Interaction
- Other Data: Other Data Types
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Identifiers: Device ID
- Usage Data: Product Interaction
- Other Data: Other Data Types
- Health & Fitness: Health, Fitness
- User Content: Photos or Videos
Used for: Third-Party Advertising, Analytics, App Functionality
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