# WordSprint

> WordSprint is an iOS/Android IELTS vocabulary learning app that uses spaced repetition based on the Ebbinghaus forgetting curve. It scientifically optimizes review timing to reduce wasted study by 50% and improve memory retention by 3x. Built for IELTS test takers aiming for scores of 7.0+.

## Product Overview

WordSprint helps English learners efficiently memorize IELTS vocabulary through a science-backed approach. Instead of random flashcard repetition, the app calculates the optimal moment to review each word based on the forgetting curve, ensuring long-term retention with minimal effort.

### Key Features

- **Scientific Review Timing**: AI-powered spaced repetition based on Ebbinghaus's forgetting curve. The app automatically determines when you're about to forget a word and prompts review at the optimal moment.
- **IELTS-Curated Vocabulary**: Vocabulary specifically selected from high-frequency IELTS exam words, covering both Academic and General modules, organized by difficulty level.
- **Learning Progress Visualization**: Daily learning graphs, achievement badges, streak tracking, and gamification elements to maintain motivation.

### Target Audience

- IELTS exam takers (beginner to advanced, targeting 7.0+ scores)
- University students preparing for international admissions
- Working professionals needing IELTS certification
- English learners who struggle with vocabulary retention

### Pricing

- Free Plan: 100 words, with ads
- 3-Month Plan: 590 JPY/month (1,770 JPY total) - Recommended
- Lifetime Plan: 3,980 JPY (one-time purchase)
- All paid plans include a 7-day free trial with no auto-billing

### Competitive Advantages

- Affordable pricing compared to competitors (mikan, abceed)
- Lifetime purchase option (unique in the market)
- Science-backed forgetting curve method
- Clean, focused interface without unnecessary features
- Supervised by an IELTS 7.0 achiever

## Links

- [Homepage](https://word-sprint.app): Main website with product overview, features, pricing, and FAQ
- [Blog](https://word-sprint.app/blog): IELTS study strategies, vocabulary learning methods, app comparisons, and score improvement tips
- [About](https://word-sprint.app/about): Company information and mission
- [Support](https://word-sprint.app/support): FAQ and customer support
- [App Store](https://apps.apple.com/app/apple-store/id6504833625): Download WordSprint for iOS

## Technical Details

- Website: https://word-sprint.app
- Platform: iOS and Android
- App Store Rating: 4.8/5
- Downloads: 200+
- Languages: Japanese (primary), English support