A solo developer building small apps after work — and writing down what the process actually taught me.
Every in-app ad number from 14 mini apps on Apps in Toss, broken down by day and by app. 13,365 KRW over 27 days, 2,073 impressions, 6.45 KRW per impression. Why eCPM varies twentyfold between apps...
Five days ago I called it my last mistake. I was wrong. The console showed approved, active and delivered every day, while the number of people receiving anything stayed at zero. If the group code ...
Minesweeper with three difficulties, a flag mode, and a cell-size option you can change mid-game, now on Google Play and Apps in Toss
A clean take on 2048 with undo, a daily challenge that gives everyone the same board, statistics and auto-save, now on Google Play and Apps in Toss
The Apps in Toss build of Hangul Monsters hid its speech mode entirely and ran listening-only, because the code hardcoded available:false on the belief that the Toss WebView had no speech recogniti...
On September 8 I launched ten mini games on Apps in Toss, and every one of them shipped with an empty ad slot because I never created the ad placements in the console. Nothing errored, so it took t...
Apps in Toss announced major changes across four separate notices since late August. Promotional smart-message push ends October 1, a full compliance review of every non-game mini app starts Septem...
Everything that went wrong while adding free scheduled push (smart messages) to Apps in Toss mini apps. How consent forms relate to templates, the AI-review wording rules, and the biggest mistake o...
We removed every in-app purchase from our two kids' learning apps. After a week with zero sales, we decided that an educational app for young children should simply be open to everyone.
Sudoku, Nonogram, All Lights Off, Hangul Word Guess, Tap Bird and Number Rush went live on Google Play and Apps in Toss within five days. Why one shared spec, the one-pass registration order, and t...