Software for online stores, built by one person and a team of AI
Stelar Digital makes 5 apps for stores on Shopify (the platform many online stores run on), plus a free store check and free tools for store owners. Every app has a free trial or a free plan.
- One person and a team of AI
- Free trial or free plan on every app
- Open numbers on /open
Five apps for Shopify stores.
Install one, it does its job, you get on with your day.
GETTING PAIDFlatInvoice
Sends the customer their bill the moment they order.
- PDF invoices and packing slips for every order, automatically.
- GST, VAT, ABN, EIN — whatever tax ID your labels need.
- Sequential numbers (INV-0001…), your logo, no theme code.
NEVER RUNNING OUTLow Stock Alerts & Notify Me
Emails you when stock runs low, and shoppers when it's back.
- Set your own low-stock threshold (per product on Pro).
- One alert per dip — re-armed automatically once you restock.
- Back-in-stock emails win back the shoppers who were waiting.
NEVER RUNNING OUTRestockly
Tells you what will run out and when to reorder.
- Four simple tiles — no dashboard to learn.
- A reorder list grouped by vendor.
- No setup. It just works from your inventory.
REORDERING FROM SUPPLIERSStockyard
Purchase orders and reorder reminders, no spreadsheet.
- Reorder alerts before you actually run out.
- Supplier management in one place.
- Dead-stock reports show what to stop buying.
BEING FOUND BY AIAivis
Shows whether AI assistants are buying from your store, and what blocks them.
- Find out what's blocking AI shoppers from checking out.
- See who AI recommends instead of you.
- Pro drafts the fix for you; you approve it.
Low Stock Alerts & Notify Me was called StockPing until September 2026. Same app, same developer. Compare all five.
Calculators for store owners.
Fees, margins, break-even and reorder points. Free, in your browser, no signup.
Shopify Fee Calculator
See what Shopify really costs per month: plan price, card fees, third-party gateway fees, effective rate and the cheapest plan for your sales.
Open the calculator →Ecommerce Profit Margin Calculator
Work out profit per order, net margin, markup and break-even ROAS from your product cost, price, shipping, payment fees and ad spend per order.
Open the calculator →Reorder Point Calculator
Calculate your reorder point from daily sales, supplier lead time and safety stock, and see how many days of cover your current stock gives you.
Open the calculator →Break-Even Calculator
Find how many units and how much revenue you need each month to cover your fixed costs, with a simple chart of revenue against total cost.
Open the calculator →Can an AI assistant buy from your store?
The free check (about a minute) shows whether an AI assistant (software like ChatGPT that buys things for people) can find and read your store. The full report walks it all the way to checkout and lists the fixes.
x402 Doctor
Grades any x402 service on 9 checks and hands you the exact fix. x402 is a way for software to pay for a service on the spot, no account and no card. The check is free; a full report is available.
One person. A team of AI.
Robert runs Stelar Digital from Roseville, California. AI assistants research, write and test every change, around the clock; he decides what ships.
Everything is free to start.
Install an app on Shopify, run the store check, or grade an x402 service. Questions go to stelardigital@stelardigital.com or the Discord.