Things I've written down
Longer answers to the questions people email me. Mostly about why a code didn't work, which app is actually cheapest, and the deals the apps don't advertise.
Oct 23, 2026DoorDash
DoorDash promo codes for existing users: what actually works in October 2026
There's no public DoorDash code for existing accounts right now. Here are the four things that do take money off an order, and how each one works.Oct 20, 2026DoorDash
Why your DoorDash promo code says "not valid" (and the fix for each reason)
Five reasons a DoorDash code fails, in the order they're usually the problem. Number one surprises people.Oct 17, 2026Comparison
DoorDash vs Uber Eats vs Grubhub fees: how to compare the same order
Where the money goes on a delivery order (menu markup, delivery fee, service fee, tip), why the delivery fee alone misleads, and how to check all three apps in two minutes.Oct 14, 2026Gift cards
Where to buy a DoorDash gift card for less than face value
A few places sell DoorDash gift cards below face value, and it stacks with every promo code because it's just payment. One kind of seller I'd avoid.Oct 11, 2026Uber Eats
Uber Eats promo code for new users: why it keeps saying "not eligible"
It's your phone number, not your email. How Uber decides you're new, what the first-order offer is, and what to do if you're genuinely new and it still fails.Oct 8, 2026DashPass
Is DashPass worth it? The math for how often you order
DashPass is $9.99 a month. Whether it pays off comes down to the delivery fee it removes and how many orders you place. Here's how to work out your own break-even, and how to get it free.Oct 5, 2026Grubhub
Grubhub+ is free with Amazon Prime, and it takes two minutes to turn on
Prime includes a full Grubhub+ membership: $0 delivery fees on orders over $12 and lower service fees. Here's how to activate it, and what it does and doesn't cover.Oct 2, 2026Instacart
Instacart promo codes: the new-customer offer and what existing customers get instead
Instacart's first-order offer is free delivery on your first three orders, applied automatically. Here's what existing customers get: store-specific codes, in-app coupons, the Instacart+ trial, and why "free delivery" isn't really free.Sep 30, 2026Uber Eats
Uber One: how to get it free, and whether it's worth $9.99
Uber One covers Uber Eats delivery fees and discounts rides. The free month, the student rate, the credit cards that help, and how to work out your own break-even.Sep 27, 2026How it works
You only get the new-customer deal once per app. Here's how they know.
DoorDash, Uber Eats, Grubhub and Instacart match on phone number, card and address, not email. What happens to second accounts, and the apps that share one offer.Sep 23, 2026How it works
The cheapest way to order delivery in 2026 (it's usually not a promo code)
Every way to save on DoorDash, Uber Eats, Grubhub and Instacart, ranked by what it's typically worth on a normal order. Codes come fourth.Sep 19, 2026Rides