Pay Down: Credit Card Interest

Paid your credit card off — and still got charged interest?
It's called trailing interest. It's real, it's legal, and almost nobody explains it.
Pay Down explains it — and tracks what every purchase on your cards actually costs you.

Credit card interest doesn't work the way most people think. It accrues daily, your statement balance (not your current balance) is your official bill, and after one carried month it can take two full billing cycles to get back into your grace period. Banks don't hide this — but they don't explain it either. Pay Down does, with your own numbers.

TRACK YOUR REAL CARDS

Add your cards from your monthly statements or a CSV export from your bank — no bank login needed to start. Pay Down allocates interest to each purchase, so you see the real figure:

• That $50 dinner, carried eight months at 24% APR, cost you $58. Pay Down shows you $58.
• See exactly which purchases are quietly costing the most
• Know your debt-free date from your actual payment pace — to the month
• Model paying $50 more per month (or $200) and watch the date move
• Compare payoff strategies: avalanche, snowball, or cut spending
• Get warned before trailing interest hits, and understand it when it does
• Track progress as your balances actually move — exact dollars, not vibes

Prefer automatic? Optional bank sync (Premium) keeps your cards current without imports. Your choice, never a requirement.

WHO IT'S FOR

People carrying a credit card balance who want an honest picture of what it's costing them — and a clear, dated path out. Not a budgeting app, not an investing app. If you've ever typed "why was I charged interest after I paid in full" into a search bar at 11pm, this app was built for you.

ALSO INCLUDED

• Four free calculators — True Cost, Balance Transfer, HELOC/Loan Payoff, and Minimum Payment Trap — for quick answers before you add a card
• Weekly check-ins and progress tracking
• Card sharing with your partner, so you pay it down together

FREE VS. PREMIUM

Tracking is free: unlimited cards, statement and CSV import, all true-cost math, debt-free projections, payoff strategies, and all four calculators. Premium adds automatic bank sync, the Insights tab (true-cost multiplier, category breakdowns, effective APR trends), and a monthly AI spending review — the automatic version of what the free tier already does by hand.

Pay Down Premium is an auto-renewing subscription with a 7-day free trial for new subscribers on either plan: $59.99 per year, or $6.99 per month. Payment is charged to your Google Play account. It renews unless you cancel at least 24 hours before the period ends. Try Premium free for 7 days.
Manage or cancel in your Google Play subscriptions settings.
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GET STARTED

Add your first card and see what your balance is actually costing you. The numbers might be uncomfortable. That's the point.