Sign in or sign up

Enter your email address and we will send you a six-digit code. There is no password to remember.

New here? This is also how you sign up. Use the same form — if you do not have an account yet, one is created for you when you enter the code.

Before you sign up

Never sold. Never shared for advertising. Not to insurers, not to data brokers, not to anyone. This is a small project, not a business with partners to sell to.
No trackers, no analytics, no third-party scripts. The app is only permitted to load files from its own address, so no outside company can watch what you do here.
Your email is used for one thing: sending your sign-in code. No newsletters, no marketing.
Take it with you at any time. Download every reading as a spreadsheet from your account page.
Delete it and it is gone. Deleting your account erases your readings and your email address from the database straight away. Encrypted nightly backups are kept for up to 90 days in case something breaks, and the deleted data ages out of those too.

Two services see anything, both because they have to: the database and its backups are hosted in the EU, and your sign-in emails are delivered by an email provider, which sees your address but never your readings.

Free, and free forever

No subscription, no trial that runs out, no paid tier holding anything back. Every part of this app is free to use for as long as it exists.

It is paid for out of pocket, so if it is useful to you and you would like to help keep it running, you can buy us a coffee. Entirely optional — nothing here is ever locked behind it.

Buy me a coffee