Case study
A maths app for secondary school students. Students photograph their working on an exercise and the AI grades it, explains the mistake and prepares them for the national exam.
- Type
- Own product
- Role
- Founder: product, design and engineering
- Platforms
- iOS, Android
- Started
- 2025
- Status
- In development
server functions
official sources monitored
stages in the agent workflow
Context
Wolfi started as my undergraduate project at the University of Beira Interior and is becoming a product.
What it does
Grades the working
Students photograph a solved exercise and get grading and feedback on the reasoning, not just the result.
A tutor on call
Answers questions about the exercise the student is on, at any hour.
Exam practice
Exercises, quizzes and past national exams, organised by the official curriculum.
A plan to exam day
A study plan that follows the student, day by day, up to the exam date.
The curriculum and exams change. Instead of reviewing content by hand, I built agents that detect changes and propose what to do. Nothing reaches students without approval.
- 01
Monitoring
An agent follows the official sources and records what changed.
IAVE, DGE and DGES
- 02
Impact
Each change is mapped to the curriculum, and content gaps are identified.
Curriculum analysis
- 03
Proposals
Changes become proposals, each with its own risk level.
Risk classification
- 04
Review
I approve, reject or request changes. Every decision is logged.
Human review
- 05
Execution
Only approved, low-risk proposals go ahead. The rest stays blocked.
Controlled execution
Technical decisions
- 01
Agents on a short leash
Agents propose, but only approved, low-risk work proceeds on its own. Everything else waits for a person.
- 02
AI runs on the server
Keys never ship in the app, and models and instructions can improve without releasing a new version.
- 03
AI costs under control
Each AI feature has per-student limits, and a repeated request is never counted twice.
Status
Stack
- App
- Expo
- React Native
- TypeScript
- NativeWind
- Backend
- Supabase
- Postgres
- Edge Functions
- AI
- Google Gemini
- OpenAI
- Operations
- Next.js (Wolfi Ops)
- RevenueCat