Productive tools

"Work banishes those three great evils, boredom, vice, and poverty."


Expense Management

A simple tool helps you manage all expenses in the month. Improve personal financial management skills through transaction classification and reporting.

Top 6 features:

💵 Set a budget and stick with it, know the remaining amount in the month and the amount you can spend each day.
✍🏽 Record your transactions with 34 categories.
🤩 Your data is safe, it always be on your account and in your device.
📃 View reports from 3 different perspectives: View the trend of spending, how much money you can save, and allocation of different types of expenses.
Tool was built into Google Sheets so you can access it from anywhere, anytime, online and offline.
📅 Buy once and you can reuse it your whole life.
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Articles I wrote recently

"To hold a pen is to be at war." ➡️Dive deep

The hard thing about hard things

My favorite quote so far. Every time I start with a new product or a new startup, this quote is around my head.

#quote #product-manager

thumnail of The hard thing about hard things
Publish at: Sep 24 2024 13:18

Cryptography during the French and American wars in Vietnam (P.2)

In the Introduction we commented that a common view of the American war in Vietnam is that, despite overwhelming technological superiority, the Americans lost the war because the “hearts and minds” of the people were on the side of their opponents. In view of the assumed vast technological inferiority of the Vietnamese, it is somewhat surprising that in a crucial realm of military technology — communications security and signals intelligence — there was a type of symmetry between the two sides.

#algorithm #cryptography #mathematics

thumnail of Cryptography during the French and American wars in Vietnam (P.2)
Publish at: Mar 09 2024 16:22

Cryptography during the French and American wars in Vietnam (P.1)

Does the history of cryptography during the French and American wars in Vietnam have any relevance to the concerns of people working in information security in the 21st century? The years 1945–1975 predate public key cryptography, predate DES, and hugely predate the internet. Nevertheless, there are several reasons why this story needs to be told in our time.

#algorithm #cryptography #mathematics

thumnail of Cryptography during the French and American wars in Vietnam (P.1)
Publish at: Dec 17 2023 11:29

13 Tips & Tricks to write a good RSD

Do not use related words such as “and”, “or”, “also”, “similar” etc. This is especially important because the words above can cause devs and testers to misread requirements.

#document #how-to

thumnail of 13 Tips & Tricks to write a good RSD
Publish at: Nov 25 2023 11:36