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For teamsDon't build a calendar app.
Ship one.
Building a polished Android calendar from scratch is a year and a half of engineering, design, and edge-case grinding. We've already done that. License KashCal, ship under your brand, and put the rest of the budget into the work only your team can do.
The build-vs-buy math
If you've scoped a native Android calendar, you already know what it costs.
The difference is the budget you put into work your competitors can't copy.
Who this is for
If one of these sounds like your team, the conversation is short.
You sell calendar storage. Your customers want a native Android client that looks like yours, not a generic CalDAV picker.
You sell VPNs, password managers, or encrypted email, and you're extending into productivity. A calendar that ships with no trackers fits the rest of your suite.
You ship a phone OS without Play Services. You need a default calendar that respects that and works offline on day one.
You sell Nextcloud, Stalwart, Radicale, or your own CalDAV. Pointing customers at a polished, branded client is worth more than another support article.
Field service, healthcare, education, scheduling. You need a calendar feature next quarter, not three roadmaps from now.
You looked at the timeline, the hiring, and the maintenance, and decided your team's time is better spent elsewhere. We agree.
What you get
- Your brand. App name, icon, color palette, splash, and marketing copy. Swapped at build time, not bolted on at runtime.
- Your defaults. Pre-configured CalDAV host, account hints, support links, deep-link domains. The customer's first launch already feels like yours.
- Sync that's been beaten in production. iCloud, Nextcloud, Fastmail, Radicale, Baikal, Zoho, SoGo, Stalwart, and the rest of the CalDAV long tail. RFC 5545, 4791, 6578, and 7986 compliance, tested against real servers.
- 67 languages, ready. 677 strings and 40 plurals, already translated. Per-brand strings translate incrementally without redoing the rest.
- Source access. The full app, not a black-box SDK. You can audit it, extend it, or hand it to a security review.
- A maintenance line. Sync isn't done when you ship. Servers change. We keep the engine current so you can keep shipping.
Work with us. Ship faster.
Reach out at hello@onekash.org.
Or open a thread on GitHub Discussions.