Auto apply to internships, with a real resume for every one.

ApplyTwin is a free, open-source app for your computer. It finds internships that fit you, writes a one-page resume for each posting and fills out the application, using the Claude Code or Codex plan you already have.

Finds the internships worth applying to

It scans company career boards and the big internship lists every day, then ranks each posting against your resume, graduation date, work authorization and location. Roles you can't get, like PhD-only programs or postings that need sponsorship you don't have, are skipped before you ever see them.

Writes a resume for each posting

Every application gets its own one-page resume, rewritten from your real experience to match that posting's words. Numbers, titles, employers and dates never change. It only reorders and rewords what is already true.

Fills out the application

Your twin opens the application in its own Chrome window and fills every field: contact details, work history, school, links, and screening questions from answers you gave once. It knows the quirks of Greenhouse, Lever, Ashby, Workday, iCIMS, SmartRecruiters and Oracle.

You stay in control

By default it stops on the review screen so you press Submit. It never solves CAPTCHAs or accepts legal agreements; those come to you in one short list. It signs in and creates job site accounts only if you turn that on, and the AI never sees your password: ApplyTwin types it into the page itself.

Questions

Do I need an API key?

No. ApplyTwin runs on the Claude Code or Codex subscription you already have. If you can use either one in a terminal, you can use ApplyTwin.

Will it submit applications without me?

Only if you turn that on. Otherwise it fills every form and stops on the review screen, so you press Submit.

What will it never do?

Solve CAPTCHAs, accept legal agreements, or change your numbers, titles or employers. Those come to you instead. It signs in and creates job site accounts only if you turn that on, and even then the AI never sees your password: ApplyTwin types it into the page itself.

What does it cost?

Nothing. ApplyTwin is free.