Volunteer Treasurer Builds a Receipt-Matching App With Codex

បេឡាធិការស្ម័គ្រចិត្តម្នាក់បង្កើត App ផ្ទៀងផ្ទាត់វិក្កយបត្រដោយប្រើ Codex

Summary

An engineer who is a church treasurer used Codex to build a receipt scanning app, match over 700 bank transactions, and issue tax reports.

He says preparation time dropped from over 10 hours to under 2 hours, and he no longer pays for annual accounting software.

Why this fits Cambodia

Small shops and organizations in Cambodia use ABA/KHQR a lot — matching payments helps find missing money and prepare taxes.

Worth knowing

Source note

LinkedIn post by Daniel Choi; time/cost savings are self-reported. The author is an engineer, so expect technical effort.

Original source

This link goes to the original source — the article, video, or study this case is based on.

https://www.linkedin.com/posts/danielws-choi_openai-codex-quickbooks-activity-7461201776243789824-DsN9 (opens in a new tab)

Verified 2026-10-16

Copy this prompt

I have a bank statement export (bank.csv) and a folder of receipt photos (receipts/). Build me a simple tool that reads each receipt, matches it to a bank transaction by amount and date (±3 days), and outputs a sheet with matched, unmatched transactions, and unmatched receipts. Explain how to run it in plain steps.