Step 1: Just Open
Open the app and you're in. No Sign Up, no Login, no email, no password to remember.
Built for my family.
Shared with yours.
I'm a mom of two young kids building the apps I couldn't find: ones that respect our families' privacy. No servers. No tracking. Just your data, on your device.
No servers · No tracking · No accounts · Works offline
Our promise
Privacy is personal.
As a mom of two, I don't feel safe with my family's data living on a stranger's server. That's why I build Local-First. Whether it's my period tracker or my upcoming games, your information never leaves your local storage on iPhone. There are no accounts to hack, no databases to leak, and no one watching. Just me, my code, and your peace of mind.
Featured app
Secret Period Tracker
A private space for your cycle. No cloud, no tracking, no compromises.
When I went looking for a period tracker, I was shocked that most apps required an account and wanted to upload my most personal data to their servers. As an engineer, I knew there was a simpler way. So I built the equivalent of a paper notebook that lives safely in your pocket — a digital paper notebook, private by design.
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Your Phone is the VaultEverything you log stays in your iPhone's local storage.
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No ServersThere is no "Lanasun Server." Nothing is uploaded, ever.
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Invisible to OthersNo accounts to hack, no databases to leak, no one watching.
Secret
On this iPhone only
Period Tracker
October 2026
Stored on this iPhone only. No account, no cloud, nothing leaves your device.
No account. No cloud. It just works — even in Airplane Mode.
How it works
Three steps. That's it.
Step 2: Log
Tap the calendar to log your cycle. Simple, calm, and entirely on your device.
Step 3: Peace of Mind
Close the app knowing your data never left your iPhone. There is nothing to leak.
Privacy promises
What we never do
These aren't settings you have to find and turn off. They're how the app is built.
No Accounts
No sign-up, no login, no email address. There is nothing to hack because there is no account.
No Internet Required
Works fully offline — Airplane Mode is welcome. Your cycle doesn't need a connection.
No Third-Party Tracking
No Google Analytics, no Facebook pixels, no trackers watching what you tap.
No Data Selling
Your data is never sold or shared. It can't be — it never leaves your phone.
In the workshop
Coming Soon Lab
Currently developing kid-safe, offline games for the next generation of players — built with the same local-first promise: no accounts, no ads watching, no data leaving the device.
Now in development
LanaSun
Mom of two · Engineer · UrsaStellar
About
About LanaSun
I'm a mom of two young kids and an engineer. I started UrsaStellar to build the apps I couldn't find for my own family — tools that are genuinely useful and genuinely private.
Everything I make is local-first: your data lives on your device, in your hands, where it belongs.
My Manifesto — if an app needs my family's data on a server to work, I'll build one that doesn't.