Finthemis Blog https://finthemis.com/blog/ Writing about rule-based budgeting, rolling balances, and building a personal finance app. en I automated Apple Pay transaction logging with iOS Shortcuts https://finthemis.com/blog/apple-pay-automation https://finthemis.com/blog/apple-pay-automation Wed, 21 May 2026 00:00:00 +0000 How to use the iOS Transaction automation trigger to capture every Apple Pay purchase as a draft in your budget app, even when Apple's trigger is buggy. I store my financial data in plain text files https://finthemis.com/blog/plain-text-budget https://finthemis.com/blog/plain-text-budget Mon, 12 May 2026 00:00:00 +0000 Why a budget app should save your data as CSV and JSON files in a folder you control, not a database you can't open. I cap my entertainment spending at 4% of my net worth https://finthemis.com/blog/4-percent-rule https://finthemis.com/blog/4-percent-rule Mon, 05 May 2026 00:00:00 +0000 How a single rule borrowed from FIRE thinking changed how I spend money.