ProteinGPT

AI-powered structural biology assistant

MaxBody.AI

AI body analysis and fitness plans

Picept

Smart routing, one unified API

LaunchPath

Business launch to business funding

DAS

syncdate.app

SYNCDATE is a two-way calendar sync utility for Google, Outlook, iCloud/CalDAV, and iCal feeds. Connect multiple accounts, pick which calendars sync, and changes propagate in seconds via webhooks. Synced events show as Busy by default — titles stay private unless you opt in. Skip events with exclusion rules. Stop syncing and Clean Exit removes every event it created. MCP server included so your AI agent can manage your calendars and syncs. Free for 2 calendars. Plus $8.99/mo, Pro $16.99/mo.

Productivity · Founded 2026

Productivity
SaaS

Visit syncdate.app ↗Founder interest ↓

Can you vibecode this?

Yes

OAuth flows, webhook listeners, CalDAV polling, event dedup logic, and the MCP server are all standard engineering. No licence, no catalogue, no human delivery. The core sync loop ships; per-calendar rules and edge-case handling add time but not a different category.

Build This with Leapd →

The business

Total revenue

$9K+

Verified recently

Monthly revenue

$2K+/mo

↑ Growing · 60-day average

Peak month

~$3K

Best single month

Growth

~11×

Early months vs recent

Profit margin

93%

For owners

Own syncdate.app? List it for sale.

Founders read this page looking for a business to build like your $2K+/mo one — some would rather buy one that already works. They skip the line, you get a clean exit. $25 one-time, no commission.

Why it works

Value proposition
Keeps every calendar in sync so availability is always accurate.
Problem
Professionals with multiple calendar accounts miss conflicts and double-book.
Audience
Consultants, remote workers and anyone managing two or more calendar accounts.
Business model
Free tier for two calendars; Plus at $8.99/mo and Pro at $16.99/mo, billed monthly or annually.

Good to knowFree plan, no card7-day trialGoogle CalendarMicrosoft OutlookiCloudGDPR compliant

Can you vibecode this?

Yes

Moat

Switching costs
Distribution advantage

Why people pay syncdate.app

Active syncs, exclusion rules, and per-calendar settings take time to configure; dismantling them means manually removing hundreds of "Busy" blocks. Listings on both the Google Workspace Marketplace and Microsoft Marketplace give established discovery that a new copy starts without.

Product complexity
Moderate
Webhook-driven sync engine with per-calendar rules and an MCP server requires solid real-time infrastructure.
Data
Low
All data comes from the user's own calendar accounts; no external datasets are needed.
Integrations & infrastructure
Moderate
Google Calendar, Microsoft Outlook, iCloud and CalDAV providers each require OAuth or credential integration.
Human operations
Low
Sync runs automatically; no human work is involved in delivering the service.
Regulation / hardware
Low
GDPR compliance is met by EU hosting and AES-256-GCM encryption of stored credentials.

Build this business

Use the build specification below with any AI coding tool, or build it directly with Leapd.

Build This with Leapd →

Leapd builds

Calendar sync web app with sync rules, per-calendar settings and MCP server
Subscriptions and free tier with Stripe
Google Calendar, Outlook, iCloud and CalDAV connections
A landing page

Leapd runs

Meta ads
LinkedIn and X posts
SEO and AI-search visibility
A daily report of what shipped

Opportunity check

Passes: Proven market: $2K+/mo already paid for it
Passes: Proven model: Free forever; Plus $8.99/mo; Pro $16.99/mo; Team custom, 93% margin
Passes: Proven demand: 3K+ visitors a month
Passes: Buildable: Leapd builds it end to end

build-spec.txt

Build a two-way calendar sync SaaS sold as a freemium subscription.

Product:
- Free trial before any charge
- Accounts with OAuth sign-in via Google or email, plus a user dashboard showing all connected calendar accounts and active syncs
- Calendar account connections for Google Calendar, Microsoft Outlook, iCloud and CalDAV providers using the customer's own credentials
- Sync configuration: choose calendars, set direction (mirror or push), and control per-field rules for title, description, location, colour, reminders and free/busy status
- Per-calendar overrides on Pro: apply a different title or detail rule to each calendar within one sync
- Exclusion filters: skip all-day events, free events or events whose title contains a chosen word
- Clean Exit: when a sync is deleted, remove every copy it created while leaving original events untouched
- MCP server endpoint so AI agents such as Claude can read calendars and manage syncs via the customer's own MCP credentials
- Free plan: two calendars, two connected accounts, one active sync, syncs 30 days ahead, no card required
- 7-day trial for paid plans, card required

Billing:
- Free plan forever; Plus and Pro monthly or annual subscriptions, annual billed as 10 months, Team plan at custom pricing, all charged with Stripe

Integrations:
- Google Calendar, Microsoft Outlook, iCloud, Fastmail, Nextcloud and generic CalDAV providers connected through their APIs with the customer's own credentials