one coffee apps

Independent Android studio

Small apps that keep your data on your phone.

One Coffee Apps makes local-first apps for Android. No account to create, no ads, nothing synced to someone else's server. Free to use — and if an app earns its keep, you can buy the developer a coffee.

See the apps Read the blog
The car screen showing the odometer, daily distance, fuel economy, money spent and services coming due
One Coffee Car Care
On Google Play

The apps

One job each, done properly.

Every app here works offline, needs no sign-up, and keeps its records in a database on your own phone.

How these apps are made

Three rules every app follows.

Your data stays on your phone

Records live in a database on the device. Export them to a file whenever you like.

No account, no sign-up

Install and start. There is nothing to log in to, and no profile of you anywhere.

Free, with a tip jar

No ads and nothing locked. An optional "buy me a coffee" purchase is the whole business model.

From the blog

Practical guides

All articles →
Fuel & charging How to work out fuel economy when you never fill to the top Partial fills make the usual "litres divided by kilometres" sum wrong. The full-tank method gives a correct L/100 km or MPG figure — here's how it works. 3 min read Coffee & latte art How to pour a latte art heart: high to fill, low to draw A latte art heart is two moves with one jug — fill from high, then drop close and draw. Here's when to switch, how long to hold, and how to cut the point. 4 min read Coffee & latte art Heart, tulip, rosetta: the order to learn latte art in, and what each one teaches Each classic latte art pattern adds one skill to the last. The heart teaches the drop, the tulip teaches stop-and-start, the rosetta teaches the wiggle. 4 min read

Questions, bugs, ideas?

Anything about the apps or about privacy. A person answers — usually the one who wrote the code.

coffee@onecoffeeapps.com