SoStack vs Rndvu

SoStack is a communication and coordination platform built for real-world groups. Create private group chats, plan together with shared calendars, and follow verified public groups to stay up to date on what’s happening near you. What you can do with SoStack Private group messaging: Create 1:1 and group chats for friends, teams, families, and communities. Shared calendars + events: Create events in group calendars, add events to your own calendar view, and keep plans in one place. RSVP and planning: Mark events as interested/going and coordinate details with your group. Discover and follow public groups (SoStack Plus): Find local businesses, organizations, and communities, follow them, and see upcoming events and updates. Invite by phone: Invite people to private groups via SMS links, and optionally match contacts to existing SoStack users (with permission). Location-based discovery (optional): Use a city or current location to filter nearby results. Built with safety and control Account deletion in-app: Delete your account from Settings. Privacy-first by design: Messages are protected by access controls, and you control permissions like contacts and location in your device settings.

Rndvu is group messaging built around real plans. Create a group for every crew — your hiking friends, weekend runners, brunch club, ski people, board game night — and use it to actually get everyone together. GROUPS Private spaces for the people you do things with. Real-time chat with photos, videos, voice messages, GIFs, polls, reactions and replies. Pin the message everyone keeps scrolling back to find, and mute the thread — or just one person in it — when you need quiet. EVENTS Plan a hike, a dinner, a game night, a trip. RSVP with one tap. Vote on the details with a poll. Drop the meeting spot on a map, set a difficulty, attach a GPX route or a parking PDF, and build a shared packing list anyone can tick off. A THREAD FOR EVERY PLAN Each event gets its own chat, so tonight's logistics don't get buried under last week's. Tap into the event, see the plan, talk it out. KNOW BEFORE YOU GO The weather forecast for the hour your event actually starts. Times shown in the venue's timezone, so nobody does the math wrong. Reminders set to whatever notice you actually want. SHARED CALENDARS Opt in with a friend and see when they're free. Find a free day highlights the dates everyone's actually open — no back-and-forth, no "are you around Saturday?" Just look. CATCH ME UP Come back to a thread that ran away from you and get a quick summary of what you missed, instead of scrolling through 200 messages. Powered by Gemini. Whether it's a Tuesday pickup game or a four-day backpacking trip, Rndvu is the easiest way to keep your people in the loop and on the calendar. RNDVU+ An optional subscription, monthly or annual. Everything above stays free — Rndvu+ adds: • Live event map — see everyone converge on the meeting spot • AI catch-up summaries — read what actually happened in a few lines • Find a time everyone's free — exact windows, not just which day works • Unlimited communities — free accounts can be in up to five • Higher quality photos and video • Themes and accent colors • See routes on the map • Hour-by-hour event weather Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.rndvu.io/privacy