Hi, I’m Jack Dai, co-creator of Diary Threads.

**Answer — what problem does it solve?**

I kept abandoning journals because every blank page felt like it deserved a meaningful essay. Writing one short thought on my phone felt much more natural.

Diary Threads turns journaling into a private timeline. Each entry is limited to 140 characters. You can reply when a thought continues, quote something you wrote months ago, or attach photos, video, and voice recordings.

There are no likes, followers, public profiles, or social discovery. It is a timeline for one person.

**Better — how is it different?**

Compared with Apple Journal and Day One, Diary Threads focuses on a narrower use case: capturing a thought before it disappears.

The 140-character limit gives you a smaller starting point. Replies let one moment grow over time, while quotes make revisiting an old memory feel like a conversation with your past self.

Apple Journal and Day One remain stronger choices for long-form writing and broader ecosystem workflows. Diary Threads is designed for quick private posts that gradually become a personal history.

Diary text and settings stay on your iPhone. The app requires no account and has no developer backend, advertising, third-party analytics, or cross-app tracking.

**Cost**

Diary Threads is free to download and supports up to 30 active entries.

Premium unlocks unlimited entries, share posters, recurring keyword insights, and both Home Screen widgets:

• $2.99 per month

• $14.99 per year (save 58%), or **$9.99 for the first year with code DIARYYEAR**

• $19.99 one-time lifetime purchase

Prices above are for the US storefront. Apple displays the applicable regional price before purchase.

The current App Store version is 0.3 and requires iOS 18 or later.

**Transparency**

Diary Threads itself has no AI features. I used Codex extensively as a coding and review agent during implementation, testing, documentation, and iteration. Product scope, architecture, privacy boundaries, and acceptance decisions remained human-directed.

I’m Jack, and I built Diary Threads with Sonia.

App Store: [https://apps.apple.com/us/app/diarythreads-personal-timeline/id6795139345](https://apps.apple.com/us/app/diarythreads-personal-timeline/id6795139345)

Website: [https://diarythreads.niuniuhome.cn](https://diarythreads.niuniuhome.cn)

About / developer identity: [https://niuniuhome.cn](https://niuniuhome.cn)

Contact: [jackdai20@icloud.com](mailto:jackdai20@icloud.com)

I’d especially appreciate feedback on one question: do replies and quotes make revisiting old memories feel more natural than tags, prompts, or traditional daily pages?

I built Diary Threads so journaling could feel like posting to your past self