24h: Chat, Calendar & Ledger

Keep your chats and your time in one place.

Made plans in a chat and forgot them? 24h puts chats, groups, a shared calendar, ledgers, and a diary in one app. Create an Event in the chat and it lands on both Calendars once accepted. Add Entry for trip costs and 24h works out who owes whom.

[WHO IT'S FOR]
• Film, theater, and event teams: a Main Group per project, Subgroups per team, Freeze when it wraps
• Clubs, classes, and trips with friends: Polls, Sign-up Cards, and a Shared Ledger
• Anyone who wants a tidier life: Diary, To-dos, Countdowns, and Period Log

[CHATS & GROUPS]
• Read receipts, @mentions, reactions, replies, and pinned messages
• Photos (HD option), short videos, voice, files, location, and contacts; Hold to Talk
• Groups of up to 1,000 members, with Public or Approval Required Subgroups
• Announcements, Polls, and Sign-up Cards with waitlists and check-in
• Sticky Notes, Forward, Schedule Send, and Unsend within 24 hours
• A permanent shared Album for every chat and group
• Join groups with invite links and QR codes

[SHARED CALENDAR]
• Event invites sent in chat, added to your Calendar when accepted
• Day, week, month, and year views, color-coded by group
• Subscribe to friends' Calendars; private Events show only as "Busy"
• Share Free Days and set Busy Hours to protect your downtime
• Import .ics files or Link Google Calendar (read-only)
• To-dos, habit check-ins, Public Holidays, and Photo Calendar

[LEDGERS]
• Personal Ledger with budgets, fixed expenses, and a Yearly view
• Shared Ledgers: Split Equally, custom amounts, or By Ratio
• Project Ledger for trips and shoots, with multiple currencies
• Solo Trip: a separate ledger for traveling on your own
• Settle Up finds the fewest transfers
• Snap Receipt reads items on your phone; the photo is not uploaded
• Hide Amounts and a home screen widget for today's spending

[DIARY & DAILY LIFE]
• Diary: Today's Mood, one line, weight, walks, spending, and photos
• Close Ones: Anniversaries, a daily question, Wish Box, and Letter to the Future
• Countdowns and Period Log (predictions are for reference, not medical advice)
• Stash: save messages, links, and files just for you
• Moments: share updates only with friends you choose

[24h ASSISTANT]
• Log expenses, weight, or mood in one sentence, handled on your phone
• Draw a Card, Breathing, Meditation, and Massage when you need a break
• AI helps you sort out ideas, plan your days, and draft messages
• We explain AI and ask for your consent before your first use

[CARE MODE]
• Large text and a simple layout for older family members

[PRIVACY]
• Your Diary, Period Log, private notes, Personal Ledger, and Events imported from Google are visible only to you
• Friends viewing your Calendar see only "Busy"
• Add friends by 24h ID or QR code, no phone number needed
• Turn off ID search, block messages from strangers, set "Chat Only," Block, and Report
• Passcode Lock with fingerprint or face unlock
• We never sell your data or use your chats, Diary, Period, or mood data for ads
• Export or delete your data anytime

[LANGUAGE]
• English (Beta) appears automatically when your phone is set to English. Some text may still appear in Traditional Chinese.

[CONTACT US]
Email 24happ.office@gmail.com, or go to Me → Help & About → Support in the app.