1,240+
Lab hours shaped into mobile skills you can show
Lockerlibrary trains junior developers through practice-first mobile cohorts in Kyoto and online — with clear skill ladders and mentor-reviewed code.
Browse courses
Three things we do differently
Skill ladders, not video dumps
Each track maps tools to portfolio outcomes with weekly checkpoints.
Mentor-reviewed repos
Written feedback on your pull requests — not generic quiz scores.
Assets you keep
CI templates, component kits, and rubrics stay in your portfolio after the cohort ends.
Featured tracks
Flutter Foundations Lab
Build cross-platform screens with state management patterns you can reuse in production apps.
SwiftUI Intensive
Native iOS interfaces with SwiftUI, async data flows, and TestFlight-ready builds.
Kotlin Compose Studio
Modern Android UI with Jetpack Compose, navigation, and instrumented tests.
01 — The flow
Pick a skill ladder aligned to your target stack.
Ship weekly labs with mentor-reviewed pull requests.
Assessment rubrics score architecture and tests.
Record a demo and publish your case study.
Keep templates and join the alumni channel.
From our cohorts
"Flutter Foundations Lab — the Riverpod habits module finally made navigation guards click. Week 2 was dense; mentor PR comments were specific enough to act on same day."
Ren · Junior developer , FieldLogix · 5/5
"SwiftUI Intensive TestFlight week saved me from a rejected build."
Hana · Osaka
"React Native Sprint OTA rollback exercise matched how our team ships. Detox took an extra evening — worth the Slack thread with Elena."
Sam · Frontend engineer , Orbit UI · 4/5
"Mobile QA Automation release gate YAML is now our default pipeline policy. Flaky test triage doc is pinned in Notion."
Client in logistics
Download the syllabus overview
PDF outlines every track, mentor touchpoints, and what tuition does not cover. No payment on this site.
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