Startups using Kotlin

iCollect Everything is the #1 app on the App Store for managing your collectibles or inventory, whether at home, business, work, or school.

A profitable subscription app solving a personal, emotionally-driven problem. No seasonality, universal demand across cultures, strong upfront willingness-to-pay. Already localized into multiple languages and live on iOS and Google Play, though those localized markets haven't been targeted yet. It ranks strongly in both traditional and AI/LLM search for several of the category's highest-intent keywords, all trending up.

A speech-to-text application that runs on Mac, Windows, and as a browser extension. The app allows users to record their voice and instantly generate a transcript that they can insert on any app and website on their computer.

ControlResell is a monthly subscription software that allows resellers to track all their sales and purchases. We have a YouTube channel with tens of thousands of views, a podcast, and a recognized brand image in the industry (France only). The potential is enormous, especially in the US.

ThreadCam allows user to create 3D mockups of their tshirt/garment designs. Mainly iOS app, just launched android app.

Photography app.

It is built with Swift for iOS and Kotlin for Android.

A profitable organically grown subscription-based iPhone Japanese learning app with no costs except Apple Proceeds and a differentiated Lock Screen learning experience. The product is mature, polished, and designed for recurring daily engagement, with clear expansion potential across content, localization, and lifecycle marketing.

TextBee turns your Android phone into a SMS gateway, allowing you to send SMS messages programmatically from your applications.

AI + React Native Boilerplate. Save hours (and headaches) with a production-ready mobile app, designed to ship your next startup.

Indilingo is an AI-powered language learning app built for India’s multilingual reality, helping you master 20+ Indian languages like Hindi, Sanskrit, Tamil, Telugu, Kannada and more directly from your own mother tongue, without relying on English. With adaptive lessons, live AI speaking and chat practice, real-time pronunciation feedback, and culturally rich, real-world scenarios, Indilingo makes language learning intuitive, immersive, and truly personal to every Indian learner.

no code web to app converter which converts websites to native android apps if you are small business owner or just a curious who doesn't wanna open browser everytime! This is the best choice

Turn your selfies or portraits into cool vintage photos in seconds with Vintage AI.

BlockIt blocks your addictive apps (Instagram, TikTok...) until you do real pushups, squats or planks — verified on-device with 3D pose detection, not a timer you can skip. Native iOS (SwiftUI) + Android (Kotlin) + NestJS/Postgres backend, both live in the stores. StoreKit 2 & Play Billing, paywall + free trial, gamification (levels, badges, leaderboards, clans), 5-language localization, MediaPipe pose tracking. Growth is 100% organic via short-form content.

The Kotlin/Compose Multiplatform boilerplate to launch Android and iOS apps faster, from a single codebase.

LinkedIn post generator that doesn't sound like AI

WidGeek Widget is the fastest and most fun way to stay close to your best friends by beaming your mood directly to their Home Screen.

A polished, ready-to-monetize iOS app that uses AI-powered image recognition to instantly identify wood types and plants from a single photo. Perfect for woodworkers, hobbyists, botanists, and DIY enthusiasts. Already live on the App Store with a clean UI and built-in monetization potential. A turnkey product in the growing AI utility app space — just acquire and scale.Looking to sell to raise capital, price is negotiable

AI Wine Cellar Manager. Scan, Track & Discover. Transform your beverage collection with AI-powered bottle scanning and expert cellar management. Know what you own, track your favorites, and discover new treasures.

Transform the way you work on iPhone with BossAI, the intelligent keyboard that turns your voice into polished text.

Write French you're not afraid to send. End the doubt in every sentence. Audio dictations with instant AI correction. Built for adults who want to write French without hesitation. CEFR A1 to C2. iPhone, iPad and Android.

Daily Philosophy. Ancient wisdom for modern struggles. A racing mind, a hard decision, a heavy week. People have carried these same problems for thousands of years, and the wisest among them left instructions. Roots turns their answers into a few calm minutes a day.

Dosefi — a focused subscription app for tracking medication doses and reminders. 100% subscription-based revenue with both monthly and annual plans already live and converting. Clean, single-purpose product in the health and welness niche with a loyal early user base and clear room to grow through ASO, pricing, and paywall optimization. Fully built, live on the App Store and Google Play, and ready to transfer.

Master One Habit at a Time.

Capture your daily moments in just 5 seconds. Watch your life story unfold through beautiful automatic montages.

Your subscriptions, under control. Submindo's AI scores every plan, flags waste, and finds cheaper alternatives — so you stop paying for what you don't use.

SubFox is an app that manages and tracks subscriptions, helping users save money.

Edit, compress, and chat with PDFs offline — fast, private, and lightweight. Available on both android and iOS.

AI that does photoshoots for your products

Scripttie is a teleprompter app for your phone that uses voice tracking to make recording videos easier and more natural. Instead of memorizing lines or racing against a scrolling timer, you read your script while the app listens to your voice and moves the text at your own pace. If you pause to breathe or add a thought, the script stops with you. When you start speaking again, it continues exactly where you left off.