See where in a call the customer got frustrated and why
Intermediate16h1–3
WhisperLLMCharts
16/20Voice Journal with Mood Trends
Speak a two-minute journal entry and see mood and themes over weeks.
Beginner10h1–2 people16/20 fit
Build Voice Journal with Mood Trends for people who want to journal but hate typing in ~10h with 1–2 people. Stack: Whisper + LLM + Charts + Local storage.
Why it wins: Personal, emotional and easy to demo in under a minute.
Build flow
01 · Problem
Journaling helps but typing feels like a chore, so most people quit within a week.
02 · Solution
Record voice entries, transcribe them, tag mood and recurring themes with an LLM and chart trends over time privately.
03 · Build
- 1Add browser audio recording
- 2Transcribe with Whisper
- 3Extract mood and themes as JSON
- 4Chart them by week
04 · Demo
Show a month of sample entries and the chart that reveals Monday stress spikes.
MVP checklist
- Voice entries
- Auto mood tags
- Theme cloud
- Weekly trend chart
Tech stack
| Tech | Role | |
|---|---|---|
| Whisper | Speech-to-text | AI |
| LLM | Language model | AI |
| Charts | Data visualisation | UI |
| Local storage | Client-side persistence | Data |
Reference repos
Open-source projects you can build on. Links checked 2026-10-31.
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