Privacy policy
Last updated: 28 October 2026
Alphonsus is a time blocking calendar made and run by me, Nathaniel Arnold, as an individual. If anything here is unclear, write to me at nxthaniel@alphonsus.io.
The short version
Your calendar is yours. I will never show you ads, and I will never sell your data. Not now, not ever.
Your data is encrypted in storage and in transit. It is not yet encrypted so that only you can read it, which means that, technically, it could be read from the backend. I don't look at your data, even to fix bugs. The only exception is if the law requires it. Optional account encryption is planned, and this page will change when it arrives.
What I collect
Your account. You sign in at app.alphonsus.io with your email address, using a link or code I send you. If you set a password, it is stored only in hashed form; I can never see it.
What you put in your calendar. Blocks, tasks, routines, groups, layers, tags, notes, deadlines, birthdays, locations, flights, drafts and your settings. With MAGNUS, files you attach to blocks.
Settings that may say something personal. Turning on feast days, salah, shabbat or novenas may suggest your faith. Locations and flights say where you will be. I treat all of this with particular care and use it only to show you your own calendar.
Purchases. Payment is handled by Gumroad. Gumroad tells me your name, email address and what you bought. I never see your card details.
Messages. Bug reports you send with /bug, ideas you send with /suggest, and emails you send me.
Analytics. None. I may one day add privacy friendly analytics that use no cookies, and if I do, I will update this policy first.
Cookies. Alphonsus uses only the cookies it needs to keep you signed in. No advertising or tracking cookies.
Why I use it
To run your calendar and keep it in sync across your devices, to provide the features you turn on, to process your purchase, to fix what is broken, and to write back to you. Nothing else.
Who else handles it
Some features rely on outside services. Each receives only what that feature needs.
- Supabase stores your account, your calendar data and any files you attach, and sends your sign in emails.
- Vercel hosts the website and the app.
- Gumroad handles payments, together with its card and PayPal processors.
- AirLabs receives the flight number, date or route you search with /flight.
- Google provides weather, travel routing and place search. It receives the locations, routes and times those features need, and what you type into a location field.
- Anthropic provides the app's AI features. When you use one, it receives the text that feature works on: a line in the command bar the app asks it to read, a note you ask it to expand together with that note's lines and its inbox's instruction, or a question you ask with /ask together with the note it is about. Nothing from the exchange is kept, apart from what is written into your calendar.
- AlAdhan supplies Islamic holiday dates as a one way feed. It receives no personal data.
Your data is stored in the United States, and some of these services may process it there or elsewhere outside your own country.
How long I keep it
As long as your account is open. You can delete your account yourself at any time, in the app: type /deleteaccount in the command bar, or use the Danger section in :settings. That deletes your account and everything in it, including any files you attached. Backups clear out within 7 days after that. Purchase records are kept as long as tax rules require.
If the free beta ends for you
When the desktop app ships, free beta use ends. You will be able to download your data before you lose access. I will email you at least 30 days before that happens. Free accounts are deleted 30 days after the beta ends, unless you buy Alphonsus.
Your choices
You can export your data from the app at any time by typing /export in the command bar. You can delete your account yourself, as set out above. You can also ask me to show, correct or delete anything else I hold about you by writing to nxthaniel@alphonsus.io. I will reply within 30 days.
Children
Alphonsus is not meant for anyone under 13.
Changes
If this policy changes, I will update this page and let you know by email.