Support
Find answers to common questions below, or get in touch directly.
Frequently Asked Questions
How much does Zero cost?
Zero is a one-off purchase on the App Store or Google Play. That single price includes everything — all 36 calculators, saved results and history, and the full Daily Finance tracker — plus updates for new UK tax years. There is no subscription, no in-app purchase, and no “pro” tier.
Do I need an account?
No. Zero has no sign-up, no login, and no accounts at all. You answer a few optional questions on first launch so the calculators can personalise their defaults, and everything you enter is stored only on your device.
What about the Digital Legacy Vault?
The Vault is a future feature — end-to-end encrypted storage for your important accounts, documents, and contacts, with optional next-of-kin access. It's not yet available; the Vault tab in the app shows a Coming Soon placeholder. We'll announce when it's ready.
Are the calculator results accurate?
All calculator outputs are illustrative estimates based on the inputs you provide and current UK tax year thresholds. We update regulatory figures promptly after each Budget and at the start of each tax year. You should always verify figures before making financial decisions.
Does Zero provide financial advice?
No. Zero is an educational and personal finance management tool. It does not provide regulated financial advice. All calculators, projections, and educational content are for illustrative and informational purposes only. Consult a qualified, FCA-regulated financial adviser for personalised advice.
I've got a new phone — how do I move Zero and my data?
Re-download Zero from the App Store or Google Play using the same Apple or Google account you bought it with — paid apps can be re-downloaded at no extra charge. Because your data lives only on your device, use Profile → Export data (JSON) on the old phone first to take a copy with you. Standard device-to-device transfer (iOS Quick Start / Android backup) also brings app data across.
Is my data safe?
Your financial data never leaves your phone — there's no account, no cloud database, and nothing for anyone to breach on a server. You can export everything as a JSON file or erase it all from Profile → Privacy & Data at any time. The only things the app ever sends are crash reports and — only if you opt in — anonymous usage analytics.
Contact Us
Privacy & Data
privacy@darrensterling.co.ukFor data rights requests, privacy concerns, or GDPR enquiries.
In-App Support
For the fastest help, go to Profile → About → Contact usin the Zero app to email us directly — report a bug, ask a question, or suggest a feature.