Every Korean restaurant owner we talk to has the same complaint about DoorDash, UberEats, and Grubhub: the commission is killing margins, but the orders are real. The honest answer is not 'replace them' — it is 'route the repeat customers off them.' This article does the math on when a $14K own-app investment makes sense, and when it absolutely does not.
The 30% problem in plain math
The big three delivery platforms charge 15–30% per order depending on your tier. Most Korean restaurants in NJ/NY are on the 25–30% Premier or Plus tiers because that is where you have to be to get search visibility on the apps. On a $30 banchan order, the platform takes $9. Across $20,000 in monthly delivery revenue, that is $6,000/month or $72,000/year leaving your kitchen and going to a Silicon Valley software company.
The annual cost of a typical $20K/mo delivery program
- $20K
Monthly platform revenue
gross
- 30%
Average commission
premier tier
- $72K
Lost margin per year
to platforms
- $14K
Cost of a custom app
one-time build
The hybrid is the answer, not pure-play
Do not build an app to replace DoorDash. Build one to replace DoorDash for the people who already love you. The platforms are excellent at discovery — they bring first-time customers who would never have found you. Your job with an own-app is to capture those customers on order #2, #3, and #4 with a 10–15% loyalty discount that is still cheaper than the 30% commission.
Restaurants we have worked with consistently see 30–50% of their repeat-order base migrate to a branded own-app within 90 days of launch — when they actively promote it inside takeout bags with a printed QR code and a launch discount. That migration is not theoretical. It happens when the path is short and the incentive is real.
When the math works (and when it does not)
Build your own app when:
- Monthly delivery revenue exceeds $8K — below this, the marketplace fees are smaller than the app build cost amortized over 24 months
- You have 200+ unique repeat customers per month — these are the people you can reroute
- You already use KakaoTalk Channel or have an Instagram following over 1,000 — you have a captive audience to push to the app
- You operate in a Korean diaspora area (Bergen County, K-town LA, Annandale VA) — Korean customers convert faster on bilingual experiences
Skip the app and stay on marketplaces if:
- Monthly delivery revenue is under $5,000 — you do not have the customer base yet
- Most of your business is dine-in — apps move delivery and takeout, not seated covers
- You have not yet maxed out your Google Business Profile, KakaoTalk Channel, or Instagram — those are free
- You do not have a strong brand identity — the platforms ARE your brand right now, and your app will compete with that
The 90-day launch plan
Month 1 — discovery and design. We map your existing menu structure, customer ordering patterns, and the 3-4 most-ordered items that need fastest checkout. Month 2 — build and submission. iOS + Android via React Native or Capacitor, App Store + Google Play submission, push notification infrastructure. Month 3 — launch and migrate. Printed QR codes in every takeout bag, 15% off first own-app order, push notification campaign starting week one.
What we charge
We build Korean-American restaurant apps in three tiers: a PWA (browser-based app) at $4–6K for menu and basic ordering, a hybrid React Native build at $9–14K for full ordering + push notifications + Apple Wallet loyalty, and a fully native iOS+Android build at $18–28K for restaurants that need offline mode, deep POS integration, or multi-location support. Maintenance runs 15–20% of build cost annually, plus Apple Developer ($99/year) and Google Play ($25 one-time).