Apps you buy once. They work offline, and your files stay on your own device.
LunaLog is a period tracker with a planner and a journal built in. Novelisha is for writing a novel or a script. None of the apps has an account, a subscription or an AI feature.
- Windowsdesktop app, sold here
- macOSdesktop app, sold here
- Linuxdesktop app, sold here
- Androidon Google Play
- Android without Google PlayAPK, sold here
- iPhone & iPadApp Store, coming soon


Where to get them
Each app has a desktop version and a phone version. They are separate purchases, and each one is paid for once.
LunaLog
A cycle calendar, a planner and a journal in one app. It predicts your next period with a window, tells you when a period is late, and shows you the rules it used.
What it does →
Novelisha
Novel and screenplay writing software. Tell it the book’s genre and length and it plans the chapters from published ranges; write it scene by scene, with spelling and a thesaurus built in, and export files laid out for print, ebook and submission.
What it does →
Paddle is the seller for everything bought on this site: the desktop apps, the Android download and the WordPress themes. Google Play and the App Store sell the phone apps, under their own rules. The refund policy has the detail.
WordPress themes
I also make WordPress themes. You upload one to your own WordPress site, and you pay for it once.
Garnet
Every book gets its own page, with buy buttons by format and country. Each series is listed in reading order, and there are pages for events, a newsletter and a press kit. It sets itself up when you activate it, with twelve ready-made styles to start from.
$99 USD, paid once
What it does →
Carnelian
For small presses, presses with several imprints, and authors who run their own imprint. One catalog with search and filters, a page for each imprint in its own colors, full trade details on every book, and pages for submissions, booksellers, librarians and rights. It sets itself up with a sample press when you activate it.
$99 USD, paid once
What it does →
What you get with every app
You pay once. There is no subscription and nothing to renew.
The apps need no internet after the download, and no account.
Everything is saved on your own device. Nothing is collected.
Updates are free. If you never update, the app you have keeps running.
None of the apps writes, rewrites or analyzes your words, and none of them sends anything to us or to anyone else. Nothing of yours can train anyone’s AI. The FAQ has the full answer.
Who makes this
I’m Sara Sinéad. Cosmicore is my company, and it’s just me. The apps are paid for once, they work offline, and nothing you put in them is sent to me or anyone else. My photography and writing are at sarasinead.com.