Midao Tech
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Simple, focused, privacy-respecting

Midao Tech is an indie software company based in Guangzhou. We believe great products don’t have to be complicated — do one thing well, and keep user data in users’ hands.

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Midao products

Our products

Every product starts from a real need and is refined around one focused experience.

OnePlayer

A local music player with 20+ audio formats and Hi-Res playback

OnePlayer is a local music player built for the Apple ecosystem. Play the MP3, FLAC, WAV, AAC, DSD and Hi-Res files you already own, import them by Wi-Fi, USB, the Files app or AirDrop, and listen on iPhone, iPad, Apple Watch and CarPlay.

  • 20+ audio formats: MP3, FLAC, WAV, AAC, AIFF, M4A, DSD, APE, OGG, Opus and more
  • Import via Wi-Fi transfer, USB, the Files app or AirDrop
  • Offline playback on Apple Watch, no iPhone needed
iPhoneiPadApple WatchCarPlay
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Your local library, clean and organized

HeartStress

Understand your heart rate and notice changes earlier

HeartStress turns your Apple Watch heart rate data into one clear 0–100 daily stress score, built around resting heart rate trends. It establishes a personal baseline from your own history — the question is never “is your heart rate good enough”, but “how is today different from your normal”, explained in plain language.

  • Daily 0–100 stress score compared against your personal baseline, not population averages
  • Resting HR, sleeping HR, HRV, sleep and activity signals ranked by impact
  • 7 / 30 / 90-day trends and heatmaps to spot deviations and recovery
iPhoneApple Watch
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A daily 0–100 heart stress score

ColorMemo

Simple, elegant colorful notes that make writing a delight

ColorMemo is a simple, beautiful place for thoughts, plans, lists and moments worth remembering. Give every note its own color, stay organized with tags, search and pinning, turn notes into polished images, keep them close with Home Screen widgets, and continue writing across devices with iCloud.

  • Choose from carefully designed colors to make every note easy to see
  • Organize important content with tags, search and pinning
  • Switch between card and list layouts to browse your way
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Colorful notes for every thought

Yesterbook

Turn a life into editions

Yesterbook is a private journal that grows with time. Write more than once a day and add photos, moods, places and weather. Every entry stays editable for 24 hours, then seals permanently: the original remains unchanged while your future self can still add notes. Each month becomes a thoughtfully designed personal edition, making ordinary days worth reading again.

  • Multiple entries per day, automatic drafts, photos, moods, places and weather
  • A separate 24-hour editing window for every entry, followed by permanent sealing and append-only notes
  • Automatic monthly editions with covers, a table of contents and carefully designed page layouts
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Monthly entries become a personal edition

Midao Journal

Recent notes

Long-term notes on products, design, and independent development.

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What We Believe

A few plain principles behind our products.

Simple & Focused

No feature bloat — do one thing really well. You know what to do the second you open the app.

Privacy First

Your data stays on your device by default. No tracking, no uploads, no over-collection — that’s our baseline.

Independent

A small team crafting with care. Our bar for every product: we happily use it every day ourselves.

About Midao Tech

Guangzhou Midao Technology Co., Ltd. focuses on building simple, focused and privacy-respecting software. Our products cover everyday needs including music, health, notes and journaling, and all of them process data locally without unnecessary collection.

Contact Us

To learn more or discuss collaboration, reach out through any of our product websites.

OnePlayer HeartStress ColorMemo Yesterbook