Okojyo-Soft / About日本語
About Okojyo-Soft
Okojyo-Soft is a one-person studio for iOS apps and web tools, run by a working in-house IT engineer in Japan. Each tool started as something I needed on the job.
What I make
- iOS apps: CmdDeck, SubnetDeck, JotDeck, and three apps for Japan (情シスの教科書, オコジョ英会話, ライフタイル)
- Web tools: Subnet calculator, Command reference, End-of-support database (Japanese)
About the information on this site
- The end-of-support database is built by checking each vendor's own published information. Every product shows the date it was last checked and how firm the source is.
- Some products use data from endoflife.date.
- The command reference is based on the commands included in the CmdDeck app.
- Dates and specifications change when vendors update them. Before citing anything in an approval or audit document, follow the source link on the page and check the vendor's original.
Reporting an error
If you find a mistake, please use the support contact on the relevant app's page. I will check it and correct it.
Command reference: CmdDeck. Subnet calculator: SubnetDeck. End-of-support database: 情シスの教科書.
Activity
- 2026 — Took part in Built with Claude: Japan 2026 with “Hikitsugi”, a tool where AI compiles an IT handover manual when a company's only IT person leaves, so a non-IT successor can handle everyday trouble.