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Yes. Your financial data is locked to your account by row level security, so nobody outside your household can reach it, and inside your household your partner sees only what you chose to share. It is stored on Supabase, an independently audited and certified cloud platform (SOC 2 Type 2 and ISO 27001), and encrypted both while it moves and while it is stored. CrestCast never sees your password or your card details. Read more →

No. Your data is used only to run your own forecast. It is never sold, never used for advertising, and shared only with the processors named in our privacy policy.

No. CrestCast never connects to your bank and never asks for your bank login. You enter your own numbers, your data stays private, and the forecast reflects exactly what you tell it. If you would rather not type everything in, hand it the CSV your bank already exports. If the layout is not recognised, you map the columns once. CrestCast picks out the payments that repeat and offers each one as a bill or an income source for you to keep or ignore. That happens on your own device, with nothing uploaded. Read more →

No. The assistant is optional. It drafts inputs from what you tell it and answers questions using only figures your forecast already shows. Nothing goes into your plan until you add it, and anything it drafts, such as a what-if, is saved as a separate version beside your plan, so the choice stays yours.

No. CrestCast is a forecasting and planning tool, not regulated financial advice. It shows what each choice does to your numbers; the decision is yours.

Your plan is stored by Supabase in Frankfurt, Germany (EU). The app is served by Vercel, which does not store your plan, and payments go through Stripe, which keeps your card details. If you use the AI assistant, your message goes to Anthropic, which can process it in the United States and does not train its models on it.

Yes. Delete Account in Settings removes your figures, forecasts and saved versions. Nothing goes straight away: we wait 30 days, and signing back in before then cancels it. If you share a household, your partner keeps their own copy of the joint items.

The arithmetic is not estimated. UK income tax, National Insurance and student loan repayments are calculated from the published rules, every loan runs on its own repayment schedule, and your bills and pay changes land on the dates you give them. When a salary or a bill turns out different, log the real amount in your inputs and the forecast carries on from it. Tap any figure on a statement to see how it was worked out. Read more →