About Simple Apps Online

Simple Apps Online is a small collection of everyday tools that open instantly in your browser. Each one does a single job well, works on your phone or computer, and never asks you to install anything or create an account.

Why no ads and no sign-up?

A stopwatch or a level should be ready the moment you need it. Ads, pop-ups and login walls get in the way of that, and they usually mean collecting data about you. We would rather keep the tools fast and quiet.

How your data is handled

The sound meter and bubble level read your microphone and motion sensors directly in your browser. That data is processed on your device and is never recorded, uploaded or stored. Settings such as calibration are saved only in your browser. The privacy page has the details.

Honest measurements

Phone sensors are useful but not lab instruments. Where a reading is an estimate, the tool says so and explains why, rather than showing numbers that look more precise than they are.

Also from us

Simple HIIT Timer is our free interval timer for HIIT, Tabata and circuit workouts.

Suggest a tool

We add tools based on what people actually need. More are on the way, chosen for usefulness rather than quantity.