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One line a day is all you need.

There are times when you want to summarize your day but don't have the time to write a long entry. One-Line Diary is a tiny diary designed for you. If you record your day in just a single sentence, AI will send a warm reply tailored to your feelings.

It’s perfect for:

• You find long diaries burdensome but want to record your day

• You want to confide in someone about feelings you can't tell anyone else

• You wish there was an app where someone could offer a warm word of encouragement

• You are tired of ads and account sign-ups — you just want to write quietly

Key Features

📝 One-Line Diary — Once a day, under 100 characters. No pressure.

💌 AI Warm Replies — Reads the emotional nuances of your diary and offers a single sentence of encouragement and empathy.

🌙 Streak — One by one, the traces of today quietly accumulating.

📅 Year's Flow Heatmap — View your diary entries from the past year at a glance. Look back on your past days with affection. 🔒 Complete Privacy — No account, no login, no ads. Diary content is stored only on your device.

Privacy Processing (Transparent Disclosure)

Diary content is permanently stored only on your device. To generate AI replies, diary text is temporarily sent to OpenAI (GPT-4o-mini) via a Cloudflare Workers proxy, and the proxy does not store the content. No personal information, such as name, email, or location, is collected.

Details: https://ssamssae.github.io/daejong-page/privacy-hanjul.html

Creator

This is a side project by solo app developer Daejong Kang. It was built using Flutter + Cloudflare Workers + OpenAI API.

Contact: ssamssae@me.com