Project Overview
A UK personal finance startup wanted to build a money management app aggregating all user financial accounts (...
Technology Stack
Compliance & Standards
The Challenge
A UK personal finance startup wanted to build a money management app aggregating all user financial accounts (current accounts, savings, credit cards, investments) via Open Banking to provide: net worth tracking, spending categorisation, savings insights, and budgeting. Consent management (90-day re-authorisation per PSD2/Open Banking), FCA Consumer Duty (avoiding dark patterns in nudge features), and UK GDPR consent for financial data processing were the primary challenges. Budget: £95,000.
Our Approach
TrueLayer as Open Banking provider
50+ UK banks supported.
Account types
current accounts, savings, credit cards, mortgages, investments (where supported). 90-day consent re-authorisation: automated in-app reminder flow at day 80 (not day 89 — ICO guidance says reminders should not be designed to expire before users act).
Consent revocation
instant from within app.
Merchant categorisation
- in-house ML model (Python + scikit-learn) trained on anonymised UK transaction data.
- Merchant name normalisation (deduplicate "AMZN*", "AMAZON", "amazon.co.uk").
Category taxonomy
18 spending categories aligned with ONS Consumer Price Index categories for relevance to UK users.
Savings nudge features reviewed against FCA Consumer Duty Consumer Understanding outcome
no misleading comparisons (savings rate comparisons include all charges), no dark patterns in nudge notifications (optional and easily dismissed), clear distinction between data insights and financial advice (automated insights are not regulated advice — explicit disclaimer on each insight).
Granular consent
users consent to specific processing purposes independently (spending analysis, savings insights, budgeting, marketing).
Consent withdrawal
withdrawing marketing consent does not affect core service consent.
Consent audit trail
every consent event (grant, withdraw, update) logged with timestamp for ICO accountability.
The Results
Launched to beta at 12 weeks, £88,000 — under budget.
Open Banking connections: 8,200 accounts linked in first 3 months.
Average accounts per user: 4.1 (across current, savings, credit).
Spending categorisation accuracy: 94% (user correction rate 6%).
FCA Consumer Duty review at 3 months: zero adverse findings.
UK GDPR audit: granular consent architecture praised by DPO as best practice.
App Store rating: 4.7/5.
“The consent architecture ClickMasters built is genuinely the best I've reviewed in three years of consumer finance DPO work. Granular, auditable, and genuinely easy for users to understand. The FCA Consumer Duty review was a non-event — exactly as it should be." — Data Protection Officer, UK Personal Finance App (name withheld)”
Project Details
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