Learn more about Keystone:
Keystone helps you organize spending using Workspaces and Categories, submit Expenses, and collaborate via Shared Categories.
A workspace is your top-level container for a project or budget. It holds all related Categories and Expenses.
Tip: Create a workspace for each team, event, or personal budget.
Categories live inside a workspace and help group expenses (e.g., Travel, Meals). You can create subcategories to organize further.
Tip: Use subcategories for detailed budgets like "Travel → Flights".
An expense is a record with amount, date, optional receipt, and notes. Expenses are added to a specific category.
Tip: Upload a receipt photo to enable itemization and faster review.
Share a category with others to submit or review expenses together. The permissions system allows flexible collaboration.
Roles: Submitter (add expenses), Reviewer (approve/deny), Admin (manage and share).
Invite people without accounts using a secure link limited to a single category.
Permissions: Submitter (upload expenses) or Reviewer (view and review). Links can expire or be revoked anytime.
Create a Workspace, then add Categories.
Add Expenses with receipts and notes to the right category.
Share a category and assign roles to collaborate on submissions and reviews.
Review pending expenses and approve or deny as needed.

I build software that solves real-world problems, from Keystone to Mazda longitudinal control for openpilot. My experience also includes an internship at IBM.
I'm looking for full-time software engineering opportunities starting summer 2027. If you'd like to connect, reach out at the email below.
Thank you for using Keystone! Questions or feedback? Email thejunkyarddev@gmail.com