Founders launching a first app
We need to be on the App Store and Google Play, and I can’t tell if the work is moving.
You install test builds on your own phone as the app takes shape. Progress is something you can tap.
Mobile app development
iPhone and Android apps for startups, from one codebase
Shipped to the App Store and Google Play under your own developer accounts, with test builds on your phone along the way.
- Store accounts in your name
- App Store review handled
- Test builds on your own phone
30 minutes with a founder. Times show in your time zone.
Mobile app development at a glance
Cross-platform iOS and Android app development in React Native, shipped to the App Store and Google Play under your own developer accounts.
- Who it’s for
- Founders launching a first app
- Businesses whose customers come back every week
- Teams with people in the field
- What we build
- iPhone and Android apps
- React Native app development from one codebase
- Customer apps: ordering, booking, and loyalty
- Team apps: field service, sales, and delivery
- App Store and Google Play publishing
- Built with
- React Native (Expo) or Flutter
- Firebase
- Stripe
- RevenueCat
- App Store Connect and Google Play Console
- What you own
- Code in your GitHub from day one
- Cloud and store accounts in your name
- IP assigned as each invoice is paid
How we'd build yours
Example plan
Here's how we'd plan a class-booking app for a small chain of fitness studios.
- Kickoff
We list the screens and open your developer accounts. You try clickable designs on your phone.
- Sign-in
Final designs, plus Sign in with Apple, Google, or email. Your first test build arrives through TestFlight and Google Play internal testing.
- Booking
Browse classes, book a spot, and pay with Apple Pay, Google Pay, or a card via Stripe.
- Admin
Staff admin panel, memberships, and push reminders on real schedule data.
- Testing
Testing on older iPhones, mid-range Android phones, and slow networks. Closed testing starts.
- Launch
Store submission and review fixes. Live on the App Store and Google Play.
This is an example plan, not a past client project. Your plan depends on your features, account approvals, and store review times.
Who this is for
Sound familiar?
Businesses whose customers come back every week
Our customers reorder by phone or email. Can they do it in our own app?
A customer app for repeat orders, bookings, or rewards, with payments and a staff admin panel.
Teams with people in the field
Our field teams still run on paper forms and texts.
A work app for jobs, check-ins, photos, and forms that keeps working when the signal drops.
What we build
iPhone and Android apps
Most US consumer apps need both stores on launch day, so we plan iPhone and Android together. Sign-in, payments, and notifications work the same on both.
- Sign in with Apple, Google, or email
- Apple Pay, Google Pay, and cards via Stripe
- Push notifications for orders and reminders
React Native app development from one codebase
React Native runs your app on iPhone and Android from one codebase, so both stores get each update the same day. You get one team, one set of tests, and one release.
- One codebase, both stores
- Same features at launch
- Native code only where needed
Customer apps: ordering, booking, and loyalty
A customer app earns its place when people come back often. Customers get the app, and your staff get an admin panel for orders, inventory, and offers. If customers visit only once in a while, we'll say so and suggest a mobile-friendly web app.
- Repeat orders and saved addresses
- Class, slot, and appointment booking
- Reward points, offers, and an admin panel
Team apps: field service, sales, and delivery
Apps for your own people must work one-handed, keep working offline, and sync when the signal returns. Photos, GPS check-ins, and forms replace paper, and the data lands in one place.
- Job lists and route stops
- GPS check-in and photo proof
- Forms that work offline
App Store and Google Play publishing
We open your Apple and Google developer accounts in your name and prepare listings, screenshots, and privacy details. Organization accounts need a D-U-N-S number, which can take weeks. As of September 2026, new personal Google Play accounts also need a 14-day closed test with 12 testers. Apple says 90% of submissions are reviewed in under 24 hours. We start the paperwork during scoping.
- Developer accounts in your name
- Store listings, screenshots, and privacy details
- Fixes and resubmission after a rejection
How a project runs
Plain English at every step, and calls set around your working day.
How we start
Your GitHub repo and Apple and Google developer accounts are set up in your name before we write code. IP is assigned to you as each invoice is paid. Early on, you tap through clickable designs on your phone.
Working together
Test builds reach your phone through TestFlight and Google Play internal testing as the app takes shape. AI drafts; a named engineer reviews every change. You pay by the project or the week, so faster work doesn't raise your bill.
A board you can open
Bugs go on the shared board with a screenshot and the phone model. You get written updates and a preview link as the work moves. More on how we work.
Stack, and why
React Native (Expo) or Flutter
One codebase, with Swift or Kotlin only where needed.
Firebase
Push notifications and crash reports.
Stripe
Apple Pay, Google Pay, and cards for orders and bookings.
RevenueCat
Subscriptions through App Store and Google Play billing.
App Store Connect and Google Play Console
In your name, with TestFlight and internal testing for each build.
GitHub repository in your name
Code lives in your GitHub from day one.
Cloud in your account
Backend, database, and push keys in accounts you own.
A shared Slack channel with our team
Questions, builds, and decisions in one place.
Questions founders ask
Straight answers, including the ones about cost and time.
Should we launch on iPhone or Android first?
For most US consumer apps we launch both from one React Native or Flutter codebase. If budget forces a choice, we usually start with iPhone.
What is cross-platform app development?
It means writing one app that runs on both iPhone and Android instead of building two. We use React Native: most of the code is shared, and the app can still use the phone's own features, like the camera and notifications.
Why React Native? Would Flutter or native be better?
React Native ships both platforms from one codebase and shares TypeScript with your web app. Flutter suits apps built mostly on custom animation. Native fits heavy camera, Bluetooth, or AR work. We recommend one in writing during scoping.
How much does an app cost, and how long does it take?
It depends on the screens, the sign-in and payment options, the integrations, and how much has to work offline. Both platforms come from one codebase, so you don't pay for two apps. On the call, you get a ballpark range. After scoping, you get a written estimate and plan. We price by the project or the week, never by the hour.
What is TestFlight?
TestFlight is Apple's way to install test builds of an iPhone app before it's on the App Store. Google Play internal testing does the same on Android. We use both, so you can try the app on your own phone while it's being built.
What if Apple or Google rejects the app?
We fix the issue and resubmit as part of launch. Apple says over 40% of unresolved issues involve app completeness: crashes, placeholder content, and missing details. We check those, plus demo logins and privacy links, before submitting.
Who owns the code and IP?
Code lives in your GitHub from day one. IP is assigned to you as each invoice is paid. Store accounts are in your name, so listings, ratings, and downloads stay yours.
What hours do you work?
Our team is in India. We set call times around your working day, wherever you are, and questions go in a shared Slack channel.
Do I need an app, or will a web app do?
A mobile-friendly web app is often enough if customers visit once in a while. An app pays off when people return weekly, need push alerts, or use it daily at work.
Tell us about your app.
Or tell us which one sounds like you:
Or put it in writing
A few lines are enough to start, and nothing here commits you to anything.
- Tell us what you’re building.Who it’s for, what it needs to do, and any deadline you’re working to.
- A founder reads it.You get a reply by email, usually with a couple of questions.
- We talk for 30 minutes.You leave with a ballpark range, and a straight answer if we’re not the right fit.
Prefer email? sales.bydtech@gmail.com.
Send a briefGoes straight to the founders. No newsletter, no CRM sequence.