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Language Learning App Development | EdTech Mobile Apps

Structured language learning apps with spaced repetition, multiple exercise types, and AI explanations. Built by a developer who actually uses them to learn Estonian.

Timeline 8–20 weeks
Investment $5,000–$20,000
FlutterDjangoPythonGoogle TTSClaude APIPostgreSQLFirebase
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Structured curriculum

Content organised by level and topic, with progressive difficulty and review cycles built in.

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Spaced repetition system

SM-2 or Leitner algorithm — items scheduled based on performance, not arbitrary timers.

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Multiple exercise types

Choose, build, translate, dictation, error-correction — variety maintains engagement and tests different skills.

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Audio integration

Google Cloud TTS for all content, or native speaker recordings — with playback controls and speed adjustment.

01
Curriculum design

Define learning objectives, content structure, and progression logic before any code is written.

02
Content pipeline

Python pipeline for generating and validating learning content — exercises, translations, audio.

03
App development

Flutter app with clean Bloc/Cubit architecture, GoRouter navigation, and offline support.

04
Admin & launch

Django admin for content management, Play Store launch, and analytics setup.

Case Study
Estonian Verbs — Learn Estonian

Conjugation trainer with 50 A1–B1 verbs, 5 exercise types (choose, build, translate, switch person, fix error), 7 progressive blocks per verb, SM-2 spaced repetition, Google TTS audio, English/Russian UI, RevenueCat subscription infrastructure.

50 verbs · 5 exercise types · 7 blocks · Dual language UI
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Any language supported by Google TTS (100+). I've built for Estonian, Hebrew, Korean, French, Italian, Spanish, and Arabic. I understand the pedagogical challenges of different language families.
Yes — gamified with XP, streaks, badges, and level progression. The mechanics I've implemented are based on research in spaced repetition and the Testing Effect, not just copied from competitors.
Through a custom Django admin panel — non-technical content editors can add lessons, exercises, and vocabulary without touching code.
Yes — all content and progress stored locally. Audio cached after first download. Works without internet once content is loaded.
RevenueCat for subscriptions (free/premium tiers), AdMob for ad-supported free tier. I've implemented both and can advise on which model fits your audience.
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