Mobile app development for iOS and Android
You see working results at every step, not just at the end.
I build apps end to end: design, code, backend and publishing to the App Store and Google Play. I code together with AI agents, so I move fast.
Services
Three directions
Mobile apps
iOS and Android apps, end to end.
- One app for both iOS and Android
- Backend, payments and an admin panel included
- Publishing to the App Store and Google Play
- The code and accounts are in your name
MVP, fast
Test your idea with real users in weeks, not months.
- A working version by link at every step
- Only the features you need to start
- Analytics to see what users actually do
- A base you can keep growing
AI inside your app
AI features that make the app smarter.
- An AI assistant and chat right in the app
- Photo, voice and document recognition
- Personal recommendations
- Updates and growth after launch
Work
What I’ve built


ChekBack
Scan a receipt’s QR code, earn cashback and swap it for gift cards from Ozon, Wildberries and other stores.


Dress It
Dating through fashion: she posts a look she wants, he gifts it, and the ice is broken.
Voice Monkeys
Hold a key and talk, and the text appears wherever your cursor is, in any app. Recognized right on the Mac, offline, 25 languages.
NaRiski
Check Russian companies before a deal: registry status, financials, court cases, debts and a risk score.
PhotoOffice
Passport, visa and ID photos in 30 seconds: AI prepares the shot to spec and keeps the client’s look.
diagrams.love
Describe anything in plain words and get a diagram. An AI editor you can try without signing up.
Chesstourism
Chess tournaments: schedule, online registration and fee payment, results and certificates in your profile.
Process
Four steps
Message meA couple of sentences about what you need is enough to start.
We talk it throughWe break down the task, I propose a plan and a price.
You see progressYou get a working version by link instead of waiting for “when it’s all done”.
We launchThe code, domain and accounts are in your name.
Special offer
Startup for equityI build the whole product and become your technical co-founder. 50% + $5,000 Learn more →About
Who’s behind this
I’m Sergei Monkey, a developer and startup founder based in San Francisco. I build my own products, like Dress It, and develop apps for clients.
This is my only official website.
Contact
Need an app? Get in touch
Telegram is the fastest way to reach me. Other options:
- Phone+1 702 482-60-83
- Emailme@sergeimonkey.com
Payment
Pay for your project
Already agreed on the price? Pay securely by card via Stripe: enter the agreed amount and complete the payment.