Khuyen VoDesign Engineer · Saigon
Coll.2026
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iOS · personal project · 2016 to present

Moody — emotional diary

My roles: Product Owner, Designer, Marketer

My own product, end to end: product owner, designer and marketer for an iOS mood-tracking app.

Moody — emotional diary

The team

Moody is my personal project where I tried different roles as product owner, designer and marketer. I worked with a developer to build the app for iOS, and a junior graphic designer helped with graphic assets.

The experience

1. The beginning — v1.0. Moody formed around the idea of helping users do more activities based on their moods. Features include mood tracking and presets of activities auto-generated when a user is sad, bored, happy, angry. To collect the activity presets, I conducted surveys with friends and family to build up the database. The app launched on the iTunes Store for iPhone.

2. The growth — v2.0. Interacting with more users via email to grow the database. Added backup and import per user request. The fun part was finding the marketing method to launch the app to a wide audience — through different channels we hit a peak of 3,600 downloads in one day.

3. Rebrand — v3. After nearly a year of development, time for a rebrand: leaving the old visual-effect look behind, Moody adopted flat design and vector icons. Alongside this update, a Pro version with in-app purchase and an iPad version reached a wider audience.

Mood tracking and activity presets

Mood tracking and activity presets

Activity suggestions by mood

Activity suggestions by mood

Pro version with in-app purchase

Pro version with in-app purchase

Chart details — a simple, colorful bar chart of your journal

Chart details — a simple, colorful bar chart of your journal

Universal application — seamless on iPad and iPhone

Universal application — seamless on iPad and iPhone

Website v1, built on Wix

Website v1, built on Wix

Moody v1 — the first look of the application

Moody v1 — the first look of the application