Offline-capable
Built so the app can remain useful even when a constant connection is not available.
Offline-capable invoicing for iPad
InvoBaseOS keeps invoicing private, local, and clean.
InvoBaseOS is an Apple-inspired invoicing app for iPad, developed by Twin Unified Studios LLC. It is designed for freelancers first, while staying flexible enough for broader business use. The experience focuses on offline capability, encryption-based protection, and a calm interface built for everyday work.
Download on the
App Store
Coming soon
Join the beta on
TestFlight
Coming soon
Status: InvoBaseOS is currently in beta and being prepared for launch.
InvoBaseOS for iPad
InvoBaseOS Login Screen
Encryption-based direction
Shaped around protecting invoice-related business information through a privacy-minded design direction.
Apple-inspired aesthetic
Clean surfaces, calm spacing, and a polished interface designed to feel simple and premium.
Freelancer-first
Tailored for freelancers while still being broad enough for consultants, studios, and other business users.
Core features
Designed to feel calm, focused, and business-ready.
InvoBaseOS is intended to reduce friction, keep invoice work organized, and give users a cleaner business tool built around local control.
Invoice-first workflow
Built around invoicing as the core task, with a focused experience instead of a bloated business dashboard.
Local business control
Designed to feel direct and dependable, with an emphasis on keeping the workflow close to the user.
Clear visual structure
Strong readability, thoughtful spacing, and a premium layout direction inspired by modern Apple UI design.
Freelancer-oriented design
Especially useful for independent professionals who want a more private and lightweight invoicing workflow.
Offline-capable use
Supports a more flexible workflow for users who do not want to rely entirely on cloud access while working.
Everyday business usability
Meant to be simple enough to return to daily without noise, confusion, or unnecessary overhead.
Security and privacy direction
InvoBaseOS is being shaped around privacy-minded business use. The design direction centers on local ownership, encryption-based protection, and minimizing unnecessary reliance on outside systems.
- Privacy-focused direction for handling invoice-related business data
- Local-first structure intended to support stronger user control
- Professional interface without visual clutter or unnecessary complexity
- Offline-first workflow designed to reduce dependency on constant internet access
Pay Once for the Core App
InvoBaseOS is designed around an offline-first workflow, giving businesses a professional invoicing experience without requiring a recurring subscription for core functionality.
- One-time purchase for the core app
- Works offline without requiring constant internet access
- Designed exclusively for iPad
- Built for small businesses, freelancers, and independent creators
Cloud services may be offered in the future, but InvoBaseOS is being designed to remain fully functional around local ownership and offline-first workflows.
Screenshots
InvoBaseOS App Showcase
Showcasing the InvoBaseOS features and abilities in the app.
Dashboard
Secured Re-Authentication
Settings Screen
Why it stands apart
A quieter, stricter, more trustworthy way to handle invoicing.
InvoBaseOS is not trying to be everything at once. It is designed to feel focused, controlled, and reassuring, especially for people who care about privacy, accountability, and a smoother day-to-day workflow.
Ownership hierarchy
One true owner. Clear layers below.
InvoBaseOS uses a role-based structure with Primary Admin, Admin, and Standard access. The Primary Admin is the full owner of the system. Admins operate below that level with permissions and re-authentication where needed. Standard users remain view-only for safer oversight.
Privacy first
Security is not an extra. It is the product mindset.
From the way actions are handled to the way records are protected, security and privacy are treated as the first priority — not a late add-on.
Extreme encryption
Protection at every layer.
All actions are intended to remain encrypted for security, with an aggressive protection mindset built around business-sensitive data.
Audit clarity
Every action leaves a trace.
Actions are logged to support accountability, internal review, and confidence in what happened, when it happened, and who performed it.
Tamper detection
Made to notice when something feels wrong.
InvoBaseOS is being shaped with tamper-aware thinking so suspicious or unauthorized changes are harder to ignore.
High-stakes actions
Destructive actions should feel serious.
Multi-step warning verification helps protect against accidental deletion or damaging changes. This is especially important for audit purposes, where a reckless click should never be enough.
Re-authentication
Admins are challenged again when it matters.
Critical workflows can require re-authentication, while the Primary Admin retains full system-level control.
Business identity
Prefix customization built in.
Adjust invoice prefixes to better match your naming structure, client expectations, or internal business style.
Comfortable software
Clean UI. Softer lighting. Less fatigue.
The interface direction is intentionally calm and easy on the eyes, avoiding harsh visual noise so the app feels better during repeated daily use.
What comes later
Cloud sync may arrive if users actually want it.
Future cloud-based sync is being considered based on feedback, but the current direction respects users who want stronger local control first.
Launch direction
Planned to stay accessible.
InvoBaseOS is currently planned around a $9.99 one-time launch price, with the goal of providing a professional offline invoicing experience while keeping the app accessible and easy to adopt.