A solo developer building small apps after work — and writing down what the process actually taught me.
Reviews are one of the four signals Apps in Toss uses to pick recommended mini apps, yet our apps had never once asked for a rating before 29 September. Only for people who have really used the app...
Put weekly lottery spending next to the same amount in a savings account, with your own rate, and check your numbers against every real Korean draw
Two of our lottery number apps now look backwards. Every week a job searches for the birth charts and license plates whose generated numbers exactly match the real winning six. The two apps behave ...
A Korean name is broken into its consonants and vowels, read as the five elements, and the dominant element decides which number band the picks lean on
Your birth date finds your star sign, and its lucky numbers go into every pick, marked on the balls so you can see where they came from
Your licence plate becomes the seed for Korean Lotto 6/45 and Pension Lottery 720+ picks, with an every-past-draw replay that scores how the method would have done
Deposits, loans, taxes and pensions across ten topics, one question a day, with plain-language explanations and a wrong-answer notebook
Ten eras from prehistory to the present, one question a day, with an explanation for every answer, a wrong-answer notebook and per-era accuracy
On August 26 my ad publisher account was suspended for 29 days over invalid traffic, with no appeal available. Auditing every codebase turned up a cause that was not malicious clicking but builds c...
On 21 September three Apps in Toss product owners spent ninety minutes on what is changing. A quality sweep of every non-game mini app, the end of promotional push, why ad rates fell, and a three-t...