PRODUCT
Memo app MemoLune released on the App Store
Author and app developer Ami Otsuka (representative of Hundreds LLC) released the memo app MemoLune on the App Store on September 26, 2025. Its full name is "MemoLune — a memo app you can chat, speak or photograph into." The seller is Hundreds LLC and the app is free.
The release took place on stage during the keynote at PyCon JP 2025. The app was built over the 100 days leading up to the talk.
It later took third place in the Buzziest Launch Award at RevenueCat's Shipaton 2025.
LinksShipaton 2025 Winners（RevenueCat）GitHub
- The name is written inconsistently. The App Store listing uses メモるん; the PyCon JP conference report uses めもるん. The English name is MemoLune.
About Ami Otsuka
Author and app developer; representative of Hundreds LLC. Starting in October 2023, while a student at Chuo University, she built an app a day with ChatGPT for 100 consecutive days and posted each one to X, a record published as #100 Days Challenge: I Built 100 Apps in 100 Days and My Life Changed (Nikkei BP, 2025). Named to Forbes JAPAN's Women In Tech 30 in 2026. She is now based in Thailand, writing, speaking and building apps.
