Building Thoughtful Tools and Experiences

We focus on lifestyle, language learning, productivity, and health, using simple design and reliable technology to help people live and grow better.

Focused Products Built over time

Privacy First Safe by design

Global Users Growing steadily

100K+ Global users
Trust and support

✎ Petanote · Petanote

Capture life, keep every moment

Lightweight and lovely sticky notes to capture your flashing moments and whimsical ideas anytime.

Learn More Visit Petanote →

◍ Nautilus · Nautilus Oral

Breakthrough tool for Japanese oral skills based on real-life scenarios. Evolve through real conversations, not rote memorization.

Learn More Visit Nautilus →

Our Philosophy

We start from real needs and keep refining good products. Simple, reliable, and easy to use is the standard we keep coming back to.

10 yrs Building products

100K+ Global users

4+ Product lines

150+ Countries and regions

Guides, ideas, and updates across Tiny4 products

View all posts →

Ingredients do not need to be expensive, and life does not need to be dramatic. Petanote helps turn ordinary days into memories worth revisiting.

Beginners do not need more complicated tools. They need a lower starting point: one note, a few photos, and a cute generated result.

Sharing life does not have to mean posting one photo. AI can turn food, outfits, travel, and small daily moments into cute journal pages.

Ordinary phone photos can become journal material when AI helps identify the scene, organize the layout, and unify the style.