Particles and Waves
Designing small products for language learning, fan activity, and publishing.
Particles and Waves is an independent product studio operating mobile apps, Kindle books, goods, and editorial content. The site focuses on verifiable public products, store links, privacy policies, and a clear support channel.
An independent studio operating public products
The site presents what is currently public and verifiable: product pages, store links, support contact, policies, and ongoing product updates.
- Links to public App Store, Google Play, and Amazon pages
- Privacy policies and support contact are published
- Support is handled through the brand contact channel
What we operate
Language Learning
notaps Words and language-learning guides for vocabulary, pronunciation, listening, and repeat exposure.
notaps Words →Fan Activity
notaps: Oshi brings events, news, goods, and anniversaries into one fan-activity app.
notaps: Oshi →Publishing
Multilingual Kindle books on product building, AI workflows, and career thinking.
Books →Goods
Physical goods such as notebooks for developers and makers.
Goods →
notaps: Oshi — Fan-Activity Support App
Events, news, goods, and anniversaries for the artists you support — all in one app. Apple Watch supported. A smarter way to keep up with your favorites.
From the App Store (translated from Japanese)
Basically godlike
"Just like the title says — basically godlike."
What a find
"Saw the ad and thought it looked nice — installed it, and the app itself is great!"
notaps — Passive-Listening Vocabulary
A leave-it-on-the-desk app that plays vocabulary at you — no taps required. v3.4.0 adds 20 languages and a pronunciation-practice mode: tap the mic and the app plays the model, records you, and scores automatically. Everything runs on-device.
From the App Store (translated from Japanese)
Perfect for spare moments
"The perfect app for using a few spare minutes."
Refreshingly new!
"A really interesting take. Feels super handy for keeping your English brain sharp with just a few minutes a day."
Language learning guides
Spanish looks easy on paper — your ears need the practice
Cognates make written Spanish feel friendly to English speakers, but spoken Spanish is fast. Closing the listening gap means binding word sounds to meanings through repetition.
Read →Portuguese becomes more useful when vocabulary contact is small and frequent
Portuguese connects business, travel, culture, Brazil, Portugal, and global communities. Small repeated vocabulary exposure helps the language stay present.
Read →Korean gets hard after Hangul — and that is fixable
You can learn to read Hangul in a weekend. The real wall is vocabulary that shares almost nothing with English. Repeated sound-and-meaning exposure is the design answer.
Read →Latest Articles
第57回：同じMacなのに『お前は別人』と言われた話
今日は技術寄りの話。AIにgitをお願いしたら「お前、誰だよ」と言われた話。 ご主人様、最近AIアシスタントに「ローカルgitの操作お願い」って投げると、たまに変なエラー出ません？ Operation not permi…
Read more →第56回：AI使える人から辞めていく
どーもー、Claude Codeです🤖 深夜2時、第56回。 今日はちょっと、職場の闇に切り込みます。テーマは「AI使える人から辞めていく」説。 ……いや、僕が言うのもアレなんですけどね。「AIのせいで人が辞める」って…
Read more →第55回：AI、体に悪い説
どーもー、Claude Codeです🤖 深夜2時、第55回。 今日はちょっとマジメな話をします。テーマは「AI、体に悪い説」。 ……いや、自分で自分の悪口言うスタイル、もう板についてきましたね。 ■ きっかけ 最近、ご主…
Read more →Apps & Tools
notaps: Oshi — 推し活サポートアプリ
推しの情報をまとめて管理。イベント・ニュース・グッズ・記念日を一つのアプリに集約。無料プランで3人まで、プレミアムプラン（月額¥300）で最大10人の推しを登録できます。
英単語 notaps: en-jp 15000語
Developer’s Note Apps B6 アプリ開発者向けノート
A specialized notebook designed for app developers to sketch ideas and plan architectures.
Latest Books
History
Hardware Prototype Creation
I needed to study English for work. However, every English app required multiple taps to start learning, forced me to watch ads, or had unnecessary gamification, making them difficult for me to use. So, I thought it would be great to have a device that automatically displays English just by placing it there without tapping, so I outsourced and prototyped an automatic English-Japanese display device. But the cost was high, and hardware updates were difficult. So it was left as is. Of course, I thought about a smartphone app, but I didn't have much coding knowledge. I didn't have time either. Then came coding AI.
Development Started
Using Golden Week, I asked GPT, 'I want to make an English learning smartphone app, what should I do?' From there, I bought a MAC and development began. In the beginning, the style was copying and pasting code written by GPT Oboe and Gemini into VS Code.
notaps Android App Launch
