public launch ledger
Madman Studio
A public record of what I build, keep alive, shut down, and learn after launch.
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The newest live files, articles, and postmortems worth inspecting.
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Read articles- Sep 16, 2026 Two more PopSmart apps are in Shopify review An upsell bundle app and a size chart and recommender are in Shopify review for a planned October 2026 launch, while a separate research service for small ecommerce operators is also in development.
- Aug 24, 2026 Clerk belongs in the graveyard now The first PopSmart Clerk version is moving from Live to the Graveyard because demand was not clear enough, and the product has fully pivoted. Two Shopify apps are being prepared for a joint public announcement.
- Aug 12, 2026 The cold email signal is not zero After contacting about 1,500 Shopify stores, the cold email strategy is not proven yet, but weekly demo and proposal requests are enough signal to expand the test.
Graveyard
Inspect tombstones- Jul 2026 AIWAR AIWAR ran for roughly three months, but the only steady traffic was bot traffic. Ordinary user demand never showed up, while NBFS passed AIWAR's three-month traffic in two weeks.
- Mar 2025 Needles.AI Free to use and run on the cheapest hardware I could hand-build from ex-mining parts — but the model layer had become a capital game, and you cannot thrift your way to a training cluster.
human source
Marcus Ka
Korean solo founder based in Seoul. I build and run small digital products in public — live, dead, and paused.