Start with a need
Choose a practical task from everyday life and give the app a clear purpose.
INDEPENDENT DEVELOPMENT · EVERYDAY NEEDS
Haru builds
what people need.
Everyday needs are the starting point. Haru turns them into focused apps that are easy to use, for your commute, your next workout and the places you want to remember.
Made for the things you do.
And the memories you keep.
ABOUT HARU
A useful app starts with a real need.
Haru is an independent app development brand created and maintained by Dongchan Seo. Each product starts with something people need to do in everyday life, then focuses on making that task easier to understand and use.
Founded in September 2026.
View Haru apps by dongchan seo on the App Store
The products serve different needs: following a commute, keeping a workout moving, or collecting memories of places. The shared direction is simple: build useful tools, make the next step clear and keep improving what people actually use.
Independent developmentDesigned, developed and maintained with care.
Make the next step clear
Use focused screens and a short path from opening the app to doing the task.
Show what is ready
Separate published products from development work, with real store links and clear feature boundaries.
PRODUCTS · AVAILABLE ON IOS
Different needs. Useful products.
Six published iOS apps. Find the one that fits the task you want to do today.
One set at a time
Haru Workout
Keep going, set after set.
Set your reps, sets and rest time. Camera movement recognition and voice guidance help you follow the workout you planned.
Camera permission required. Recognition depends on distance, angle and lighting.
See the App Store preview
A calmer commute
Haru Subway
Which train will you take?
Compare the next two trains with estimated transfer walking time. Follow your selected train and save the routes you use every day.
Seoul metropolitan area. Estimates vary; the app does not detect actual boarding.
See the App Store preview
Your hiking memories
Haru 100 Mountains
Every mountain, a memory.
Mark the Korean mountains you have visited. Keep dates and notes, revisit the same mountain, and save the places you want to hike next.
A personal record of Korea’s 100 famous mountains. Not trail navigation or official certification.
See the App Store preview
The places you remember
Haru Travel
Your world, in little memories.
Collect countries you have visited on a personal map. Add dates, ratings and notes, and keep plans and favorites for your next trip.
The current map focuses on countries. Previously saved records are retained.
See the App Store preview
A map of your rounds
Haru Golf Map
Remember the course. And the day.
Mark courses you have played and save a score, date and note. Keep planned courses and your wish list alongside the places you remember.
The current catalog focuses on Korea. One record per course; saving again updates it.
See the App Store preview
A little of every camping day
Haru Camping Map
Keep the places you would return to.
Keep campsites you have visited, planned or put on your wish list. Save dates, notes and ratings, then return to your camping memories.
Catalogs for France and Korea, with French or Korean app interfaces. Listings do not guarantee current operation.
See the App Store preview
These links open the United States App Store. Availability, price and supported devices are shown on each store page. Korean storefront links remain available.
HOW THE PRODUCTS WORK
From a need to the next step.
Three examples from the published apps. Each flow is paired with an actual App Store preview.
Haru Workout
Follow the workout you chose.
Set the workout
Choose exercises, repetition or hold-time goals, sets and rest time.
Move in view
Place the device as the app guides you. Recognized movements count toward repetitions or plank time.
Rest and review
Follow the set and rest sequence, then look back at completed workouts in your history.
Recognition depends on camera distance, angle, lighting and the required body parts being visible.
View the published appHaru Subway
Make sense of the next train.
Choose the journey
Set departure and arrival stations in the Seoul metropolitan network, then select the train to follow.
Compare the transfer
Check the first and next train against estimated arrival and transfer walking time.
Follow the chosen train
See its indicated position, next station and remaining stops. Supported devices can show Live Activities.
The app follows your selected train. It does not detect actual boarding or completed walking, and live information needs a network connection.
View the published appHaru Travel
Keep a country and its memory.
Find a country
Browse the world map or search for the destination you want to remember.
Add your record
Mark it visited, planned or a favorite, then add a date, rating and note.
See your travel map
Return to saved memories and country progress, with the app language chosen in settings.
The current published map focuses on countries. Previously saved records are retained.
View the published appScreenshots show published interfaces with illustrative records. Example counts are app-screen examples, not Haru user or download metrics.
TECHNOLOGY & DATA
Technology with a clear scope.
Each app and platform has its own processing and connection requirements. Published features and development work are described separately.
Published iOS product
Workout: movement recognition
The camera helps recognize supported repetitions and plank hold time. The published privacy policy states that camera analysis runs on the device; camera images are neither saved nor uploaded.
Recognition can vary with lighting, camera placement and visibility. It supports workout tracking rather than professional posture diagnosis.
Workout privacy policyDevelopment candidate · not publicly released
Voice: local processing in development
A development candidate is testing local generation of summary and title drafts. These are AI drafts to review. iPhone speech recognition and behavior on actual devices are still being verified.
The Android candidate is being developed with network access and prior consent for Google SDK device and app information transfers during model preparation. The consent and download flow is still being implemented and tested.
Policies for each product
Know what connects and what stays local
Live transit information, maps, model preparation and sharing have different connection requirements. Read the policy for the app and version you use to understand its data handling.
This website is static. It uses no analytics, advertising trackers, forms, cookies or browser storage. The host may process technical requests to deliver the pages.
App support and privacy policiesIN DEVELOPMENT
More everyday needs to work on.
Haru Voice is coming soon. Local recording, transcription and summary workflows are in development, with device and language support still being verified. Haru Cats is also in development. Public downloads are not currently available; development and TestFlight builds are separate from a public release.
- Haru VoiceComing soon
- Haru CatsIn development