Introduction
What is Comma?
Comma is a mobile earnings tracker designed for independent gig workers. If you drive for DoorDash, deliver for Uber Eats, shop for Instacart, or fulfill orders for Amazon Flex — Comma is built for you.
It answers the questions that matter at tax time:
- How much did I actually earn last month, after expenses?
- How many miles did I drive, and how many are deductible?
- What do I owe in self-employment taxes?
- Was Tuesday or Friday more profitable per hour?
Who is it for?
Comma is designed for gig workers who:
- Work one or multiple delivery/rideshare platforms simultaneously or across different days
- Want to track mileage automatically without carrying a separate GPS device
- Need to log expenses and understand which ones reduce their tax bill
- Prefer their financial data to stay on their own device rather than on a company’s server
- Want a clean, fast app that doesn’t require creating an account
Core philosophy
Local-first. All data is stored in a SQLite database on your phone. Comma works completely offline. There is no backend server, no user account, no subscription required to use the core features.
Privacy by design. Comma cannot see your data. It doesn’t send earnings, mileage, or location data anywhere. If you enable Google Drive backup, your data is encrypted on your device before it leaves — only you can decrypt it with your passphrase.
Tax-accurate, not tax-advice. Comma gives you numbers to bring to your accountant, not a filing service. It knows the IRS standard mileage rate, the CRA rate, and self-employment tax brackets — but always verify with a professional.
What Comma tracks
| Category | Details |
|---|---|
| Shifts | Start/end time, platform, earnings, tips, duration, GPS route |
| Mileage | Active delivery miles, dead (commute) miles, deductible total |
| Expenses | Fuel, phone, maintenance, gear — categorized with deductibility |
| Vehicles | Multiple vehicles, odometer readings, maintenance history |
| Tax estimates | Self-employment tax, mileage deduction, quarterly projections |
| Goals | Weekly/monthly earnings, hours, or mileage targets |
| Analytics | Earnings trends, best days/hours, per-platform breakdown |
Supported platforms
Comma ships with definitions for major gig platforms in North America and the UK. You can also add any custom platform not in the list.
Delivery & grocery: DoorDash, Uber Eats, SkipTheDishes, Instacart, Amazon Flex, Gopuff, Shipt, Walmart Spark, Cornershop
Rideshare: Uber, Lyft, Via, InDriver
Courier / tasks: TaskRabbit, Postmates, HopSkipDrive, Roadie
Other: Custom platforms (any label, color, and rate you choose)
Next steps
- Quick Start — Install and log your first shift in 5 minutes
- Core Concepts — Understand the terminology before diving in