Building Granyn: a budget tracker with no bank login, in three tables
How Granyn tracks spending across currencies and catches recurring bills without linking a single bank account — the Room schema and the trade-offs behind it.
Building Stocky: predicting what your kitchen runs out of — on the device
How Stocky turns a barcode scan and a bit of usage history into a shopping list that shows up before you run out — with all the math, and all the data, staying on your phone.
Privacy-first OCR on Android: how Subly reads bills without the cloud
A practical 2026 guide to on-device OCR on Android with ML Kit Text Recognition — the setup, the code, and the field extraction tricks that keep user data off your servers.
Subscription overload: why I'm done linking my bank to apps
Subscription-tracker apps usually solve the problem by asking for your bank login. In 2026 there's a calmer way — on-device bill scanning, no Plaid, no aggregator.
Local-first Android in 2026: SQLite, Room, and keeping user data on the device
A 2026 guide to building local-first Android apps with Room and SQLite — schema design, migrations, WAL, exports, and when (and when not) to add sync.
The privacy advantage of local-first apps
The most private data is the data you never collect. Local-first isn't just an architecture choice — it's the simplest privacy policy there is.