A diary for thoughts that keep growing.
Diary Threads is proudly crafted by Jack & Sonia as a quieter way to record life on iPhone.
Updated August 2, 2026
Why does Diary Threads exist?
Diary Threads began with a simple idea: recording life can feel as light as posting, while the result can remain private, local, and meaningful over time.
- Brand
- Diary Threads
- Tagline
- Journal like you post
- Creators
- Jack Dai and Sonia
- Product
- Private, local-first diary for iPhone
- Languages
- English, Simplified Chinese, Taiwan-style Traditional Chinese, and Russian
- Design language
- Warm paper, a living blue thread, and Apple system typography
- Status
- Available now on the App Store · Version 0.4.1
A familiar rhythm with a different purpose
Short entries, replies, quotes, and a single timeline make writing feel immediate. The familiar rhythm serves one person and one private archive.
There is no public performance layer. The product is shaped around remembering, continuing a thought, and noticing patterns in a life that belongs to the writer.
Crafted around clear boundaries
Version 0.4.1 remains focused on iPhone and local-first data, with Premium private iCloud sync, favorites, and local-only Beta import and export. Product copy, privacy explanations, widgets, Premium, and sharing follow the same factual boundaries.
Jack and Sonia use the line “Proudly Crafted by Jack & Sonia” throughout the app and website as a direct signature of the people behind the product.
Contact
Product questions, support requests, and press enquiries can be sent to jackdai20@icloud.com. Jack also shares public updates on X as @JackD2040.
The official website explains the product in detail, while the public App Store page is the source for current version, compatibility, and regional purchase information.
Questions about this topic
Who makes Diary Threads?
Diary Threads is proudly crafted by Jack Dai and Sonia.
Is Diary Threads available now?
The first iPhone release is now available on the App Store.
How can I contact the developer?
Email jackdai20@icloud.com or follow @JackD2040 on X for public updates.