Each one was built and released by Savas Tutumlu. More screenshots are in the portfolio.
City guide with an AI concierge
A companion for Istanbul, Miami and New York: a daily brief with weather and transit status, a map of 1,800+ hand-curated places, an events feed, and an AI concierge whose answers, grounded in the app's own database, turn into savable multi-stop plans. English and Turkish.
Voice-first dream journal
Record a dream by voice; 1in46 interprets it against about 6,300 passages of classical dream scholarship, paints dream art and can turn a dream into a narrated film. Localized in English, Turkish, Arabic and Spanish.
Daily companion app
Location-aware prayer times with adhan notifications, the Quran, a qibla finder and a voice assistant that answers everyday religious questions with sourced references. Turkish and English, with a site at mawla.app.
Preschool learning game
An adaptive learning game with no failure states, no ads and no accounts, fully offline. When the session limit a parent set is reached, the game winds down with a goodnight scene instead of a paywall.
The screens, the data and the one thing the app must do well, agreed in writing with a fixed quote.
Working builds on your phone as the app grows, so you judge it by using it.
Screenshots, descriptions, privacy details and the App Review submission, with fixes for whatever review asks for.
Updates for new iOS versions and the features your users ask for, or a handover of the code and accounts.
Zoomi Kids is native Swift and SpriteKit because it is a game that has to run smoothly and fully offline. MUST, 1in46 and Mawla use React Native with Expo, which keeps one codebase for both platforms; that is how 1in46 reached Google Play from the code of its iOS app.
Android builds come from React Native code, as with 1in46.
Four iOS apps are live on the App Store under Savas Tutumlu's developer account: MUST: See, Eat, Visit; 1in46: AI Dream Interpreter; Mawla: Quran, Prayer Times; and Zoomi Kids. 1in46 is also on Google Play.
Through React Native. 1in46 has been on Google Play since September 2026, built from the same code as its iOS app. Native Kotlin and Flutter projects are not offered.
It depends on the app. Zoomi Kids is a native Swift and SpriteKit game that runs fully offline; MUST, 1in46 and Mawla are React Native apps built with Expo. The first call settles which one fits yours.
No one can; Apple reviews every submission. What helps is building to the App Store Review Guidelines from the start and fixing what review asks for, which is how the four live apps got there.
Every app gets a fixed quote after a scoping call, because the price depends on the screens, the backend and the integrations. Typical ranges are in the software development pricing guide.
You talk to the person who writes the code. Savas Tutumlu founded Stratagem Systems in Houston in 2023 and has shipped 30 projects since.
Describe who it is for and the one thing it must do well. The first call ends with a scope for a first version you could actually ship.
Or email info@stratagem-systems.com