Crafting Intuitive &
Privacy-First Mobile Apps
Hachi Studio LLC is a mobile application studio. We develop privacy-focused, high-performance iOS and Android utilities engineered to streamline your everyday life and travel.
Zero unnecessary data harvesting
Optimized 60 FPS performance
Compliant with review guidelines
Hachi Studio Apps
Live on Google Play
Circadian science & 6 offline travel utilities.
Oshikatsu
Counter
Live Tracker
Ticket
Manager
Live Tracker
Our Mobile Applications
Explore our published applications and ongoing development projects. Each application is crafted from the ground up with local-first data protection, battery optimization, and fluid user experience.
Jet Lag Navigation & Travel Tools
Google Play (Live) & iOS (Coming Soon)
Struggling with jet lag on international trips—feeling exhausted during the day and wide awake at night?
Jet Lag Navigation generates scientifically backed circadian rhythm schedules before departure, during the flight, and after arrival. It also packs 6 fully offline travel utilities.
Key Features & 6 Offline Tools:
- • Personalized Flight & Travel Synchronization Plan
- • 4 Scientific Action Guides: Light, Sleep, Meals, Caffeine
- • Step-by-Step Guidance (Pre-flight, In-flight, Post-arrival)
- • Dual Clock (24-hour simulation slider)
- • Tip Calculator (Culture presets & rounding)
- • Travel Unit Converter (mi/km, lb/kg, °F/°C)
- • Power Bank Wh Checker (IATA compliance)
- • International Plug & Voltage Reference
- • Offline Emergency Contacts & Useful Phrases
Get it on
Google Play
Coming Soon
App Store
Oshikatsu Counter
Google Play (Live) & iOS (Coming Soon)
Track and celebrate your favorite idols' growth in real-time!
Oshikatsu Counter helps fans easily track and visualize YouTube channel subscriber counts and music video (MV) view milestones with beautiful charts and counters.
Perfect For:
- • Celebrating 10M & 100M view milestones
- • Checking view momentum after new releases
- • Tracking idol group YouTube subscriber growth
- • Managing multiple favorites in one unified dashboard
- • Sharing milestone cards with fellow fans on SNS
Get it on
Google Play
Coming Soon
App Store
Oshikatsu Ticket Manager
Google Play (Live) & iOS (Coming Soon)
Centralized schedule & lottery pipeline tracker for concert tickets!
Oshikatsu Ticket Manager helps fans organize ticket lotteries, application deadlines, payment dates, balloting results, companion allocations, and CD serial codes in one unified tracker.
Key Features:
- • Full Ticketing Pipeline Tracker (Entry / Results / Payment / Day-of)
- • Smart Reminders for Application & Payment Deadlines
- • Duplicate Entry Prevention & Companion Status Tracking
- • Camera OCR for Fast CD Serial Code Extraction
- • 100% On-Device Local Sandbox for Strict Fan Privacy
Get it on
Google Play
Coming Soon
App Store
Developer Support & Inquiries
Have questions regarding our mobile applications, technical support, or store review verification? Our engineering team provides direct assistance.
Direct Support Contacts
Customer & Review Support
support@hachi-studio-llc.comSupport Operating Hours
Monday – Friday: 9:00 AM – 5:00 PM (Mountain Time / MT)
Denver, Colorado, USA (Excluding US Federal Holidays).
Our comprehensive Privacy Policy and User Data Deletion Instructions are published on a dedicated standalone page in full compliance with Apple and Google developer policies.
View Dedicated Privacy Policy Page →Submit an Inquiry or Bug Report
Please enter your details below. You can specify "Jet Lag Navigation", "Oshikatsu Counter", "Oshikatsu Ticket Manager", or "General".
Frequently Asked Support & Store Review Questions
Where can I download your applications?
Our apps are available directly on Google Play for Android devices, with official iOS editions arriving progressively on the Apple App Store.
How will In-App Purchases and Subscriptions be handled?
All transactions strictly utilize Apple In-App Purchase and Google Play Billing APIs. Users can restore purchases with one tap, and subscriptions can be managed directly in OS settings.
Do your apps collect or transmit sensitive personal data?
No. Our design philosophy mandates local-first storage. Travel records, counts, ticket entries, and personal data remain strictly on the user's isolated local device sandbox. We do not sell or monetize personal information.
How can App Store & Google Play reviewers reach you?
Reviewers may reach our designated review team directly at support@hachi-studio-llc.com. We monitor review communications continuously during active submission windows.
Corporate Governance
Company Profile & Transparency
Official corporate registration details of Hachi Studio LLC organized in the United States.
Legal Entity Name
Hachi Studio LLC
Limited Liability Company
Jurisdiction of Organization
United States
Secretary of State Registered
Principal Office Address
1500 North Grant Street, Ste N
Denver, CO 80203, United States
Primary Business Activity
Software architecture, native mobile application engineering, digital publishing, and ongoing technical maintenance for iOS (Apple App Store) and Android (Google Play) ecosystems.