Turn "that looks fun" into "we're going Saturday."
Tuhdun is the mobile app for everything you keep saying you want to do but never get around to. Capture ideas from any app on your phone, invite the right people, and pick a date that works — together.
The gap between discovering and doing
Every week you find restaurants, hikes, exhibits, concerts, day trips — things you want to do with the people in your life. They sit in screenshots, in browser tabs, in group chats with "we should do this" attached. Most never happen.
Productivity apps treat them as tasks. Wishlists treat them as things to buy. Couples calendars only work for two. None of them handle the actual problem: social activity planning across your real life — different ideas, different people, different groups.
Tuhdun is built for that exact gap.
How it works
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1. Share
From Instagram, Safari, Maps, email, or anywhere else on your phone, tap Share → Tuhdun. AI extracts the key details automatically: name, location, dates, duration, estimated cost. One tap to save.
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2. Organize
Ideas are tagged by type — food, outdoors, nightlife, arts, travel, sports — and filterable by status, type, and who you're planning to do it with. Your hiking list isn't the same as your date-night list.
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3. Invite
Attach specific people to specific ideas. Your weekend crew, your partner, your family group, the friend who's always up for a museum — each gets the right list, nothing else.
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4. Schedule
Any participant can propose a time. Others accept, counter-propose, or decline. Once everyone agrees, it lands on the calendar. Once agreed, it's tuhdun.
Who it's for
Friend groups
The people who keep saying "we should do something this weekend" and never do. Three of you, five of you, the whole climbing crew — capture the cool stuff you keep stumbling across, then actually pick a date.
Couples
For date ideas you both want to remember, with a place to land them and a way to plan them. No more "what do you want to do tonight" — it's already on the list.
Families
Coordinate activities across busy schedules. Parents, kids old enough for their own opinions, weekend day trips — everyone sees what's coming, everyone agrees before it's locked in.
Where Tuhdun is going
The first release focuses on the core loop: capture, organize, invite, schedule. Beyond that, the roadmap includes:
- Calendar sync — two-way sync with Google Calendar and Apple Calendar.
- Travel time — feasibility checks for back-to-back plans, surfaced before you commit.
- Weather overlay — see the forecast for outdoor plans alongside the date.
- Named groups — saved invite lists ("Climbing crew", "Date nights") instead of picking people each time.
- Web companion — desktop capture for ideas you find on your laptop.
About Underhill Software LLC
Tuhdun is built by Underhill Software LLC, an independent software studio registered in the Commonwealth of Virginia, United States. The studio focuses on consumer mobile software that solves real problems for the people who use it.
The studio was founded by Robert Underhill, who serves as its sole member and principal developer. Tuhdun is its flagship product.
For company inquiries — partnerships, press, legal, or general questions — write to admin@tuhdun.com.
Get notified at launch
Tuhdun is in active development. We're aiming to be on TestFlight and Google Play Internal Testing in June 2026, with a public launch planned for the fall.
To be notified when Tuhdun is available on the App Store and Google Play, email us at hello@tuhdun.com with the subject line "notify me". We'll add you to the launch list. We won't share your address with anyone else, and we won't email you about anything other than the product going live.