# HIKYAKU - Keto Fasting Log — Live by the sun, not the clock > Live by the sun, not the clock (iPhone/iPad app by Ryosuke Hoshino.) - Source: https://appshunter.io/ios/app/hikyaku-keto-fasting-log/id6762170563 (this page in markdown: same URL + `.md`) - Developer: [Ryosuke Hoshino](https://appshunter.io/developer/1882920339) - Category: Health & Fitness, Lifestyle - Price: Free with in-app purchases - Age rating: 12+ - Requires: iOS 18.0 · 31 MB - Languages: English - Released: 2026-04-25 - Data updated: 2026-06-26 - User reviews in markdown: https://appshunter.io/ios/app/hikyaku-keto-fasting-log/id6762170563/reviews.md ## What is HIKYAKU? 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | HIKYAKU Premium (Monthly) | $5.99 | per month | | HIKYAKU Premium (Annual) | $69.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Tokaido 90-Day Trial | $99.99 | one-time | ## Version history (last 5 releases) ### 2.1 — 2026-06-02 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 ### 2.0 — 2026-05-26 This update introduces fat-quality tracking, post-analysis catalog additions, and refined dining-out mode. Omega 3/6 Balance Tracking Daily intake of omega-3 and omega-6 is now estimated from your meal log, with the ω6:ω3 ratio shown on the PFC Balance card and per-meal analysis. When the weekly ratio is unfavorable, the weekly report recommends adding a fish oil supplement. The Library includes a new "Omega 3/6 Balance" guide with PubMed citations. Add Catalog Items After Meal Analysis After photographing a meal and getting AI analysis, you can now add catalog items right from the result screen. Example: photograph your main meal → add the apple cider vinegar you had before. Added items can be removed individually later; PFC and ω3/ω6 totals recalculate automatically. Tokaido Pace Indicator The Tokaido progress card now shows your projected final completion rate based on current pace, plus a pace badge (On Track / Good / Behind). Dining Out Mode — Monthly Quota Mark a day as a planned relaxation day to keep your snack score full. First 3 per month count as full score; 4th+ count as 0 to prevent gaming. The card shows "This month: X/3". Refreshed Premium & Bootcamp Screens Both upgrade flows redesigned with Edo-inspired typography ("passage permit" and "certification scroll" motifs) and outcome-focused copy. Other Improvements • Snack catalog: edit/delete of custom items is now restricted to Settings → Edit Snack Favorites (prevents accidental deletion) • Added "Rate on the App Store" link in Settings • Daily AI advice now correctly interprets mTOR cycling direction • Fixed English label truncation in the Snack Log tab ### 1.9 — 2026-05-21 This update introduces fat-quality tracking and a major design refresh. Omega 3/6 Balance Daily intake of omega-3 and omega-6 is now estimated from your meal log, with the ω6:ω3 ratio shown on the PFC Balance card and per-meal analysis. When the weekly ratio is unfavorable, the weekly report concretely recommends adding a fish oil supplement. The Library includes a new "Omega 3/6 Balance" guide with PubMed citations. Pace Indicator on Tokaido Challenge Below your monthly achievement rate, you now see your projected final completion rate and a pace badge (On Track / Good / Behind). One glance is enough to know whether you're on course. Refreshed Premium & Bootcamp Screens Both upgrade flows have been redesigned with Edo-inspired typography ("passage permit" and "certification scroll" motifs) and outcome-focused copy. What you get is now obvious at a glance. Other Improvements • Daily report AI advice now correctly interprets mTOR direction (e.g., when suppression is below target) • Fixed English label truncation and line-break issues on the Snack Log tab ### 1.6 — 2026-05-14 This update introduces new features and improvements. Precision Nutrition Macro Targets Enter your weight, height, age, activity level, and goal (cut/maintain/bulk) in Settings to receive personalized PFC (carbs/fat/protein) intake ranges based on your Total Daily Energy Expenditure. The Snack Log tab visualizes today's intake in real time via the new PFC Balance card. Town Courier Mode The Hikyaku tier now splits into "Town Courier" (carbs 20–30g) and "Express Courier" (carbs under 20g), enabling more realistic ketogenic practice. Koku Messages The home screen's variable-hour clock now delivers a wellness message attuned to each of the twelve koku — blending Eastern medicine, circadian rhythm, and ketogenic science. Notes appear quietly as each koku begins. Photo Supplement Notes You can now add a short note when taking a meal photo (e.g., "rice half eaten" or "less dressing"). The AI integrates the note with the photo for more accurate nutrient calculation. ### 1.5 — 2026-05-03 Bug fixes: • Fixed an issue where logging an unscheduled snack caused part of the day's planned snack schedule to disappear. • Fixed an issue where the monthly blood test report limit (2 per month) was incorrectly reached after only 1 report. ## More apps by Ryosuke Hoshino - [Menufy - Menu Translator](https://appshunter.io/ios/app/menufy-menu-translator/id6760161339) All apps by Ryosuke Hoshino: https://appshunter.io/developer/1882920339 ## Related topics [犬 中性脂肪が高い](https://appshunter.io/ios/topics/) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-26.*