# Insights & thoughts from the Blnk team [Build](https://blnkfinance.com/blog/build) [Operate](https://blnkfinance.com/blog/operate) [Product](https://blnkfinance.com/blog/product) [Guides](https://blnkfinance.com/blog/guides) [Stories](https://blnkfinance.com/customers) ### Guides Balances, double-entry, and ledger design. - [  Guides ### How to handle idempotency in your financial app using the Blnk Ledger May 4, 2026 ](https://blnkfinance.com/blog/how-to-handle-idempotency-in-your-financial-app-using-the-blnk-ledger) - [  Guides ### Complete guide: best practices for building financial apps with Blnk Ledger February 3, 2026 ](https://blnkfinance.com/blog/building-with-blnk-ledger-best-practices-guide) - [  Guides ### Double-entry accounting for developers: how to model money movement in Blnk January 14, 2026 ](https://blnkfinance.com/blog/double-entry-for-developers) - [  Guides ### Designing your ledger architecture with Blnk: a step-by-step guide April 7, 2025 ](https://blnkfinance.com/blog/designing-your-ledger-architecture-with-blnk-a-step-by-step-guide) - [  Guides ### Understanding balances in ledgers March 7, 2025 ](https://blnkfinance.com/blog/understanding-balances-in-ledgers) [](https://blnkfinance.com/blog/guides) [](https://blnkfinance.com/blog/guides)