Quant firms screen mental math. Where do you stand?

Zeta turns the apps you scroll into zetamac-style reps, tracks your 120-second score, and lets your club compete with a 5-digit code.

Coming soon to iPhone Early access: oscar@vystrax.com
A Zeta score card: 87 correct in 120 seconds, personal best, rank 3 of 41 at Zeta Week.

Math before scrolling

Turn scrolling into reps.

You already open these apps dozens of times a day. Zeta puts a few seconds of arithmetic in front of each one.

You open Instagram

Or TikTok, or any app you pick with Apple's Screen Time.

Math first. Solve 5 to open it.

Zetamac rules: + − × ÷. The next problem appears the moment your answer is right.

Unlocked for 10 minutes

Then it locks again. Practice ahead to bank minutes: 10 correct answers buys 1.

Zeta Runs

The 120-second test, scored and verified.

  • Same format as zetamac's default game · addition, subtraction, multiplication, division on standard ranges
  • Ranked runs are checked on the server · problems issued server-side, answers timed
  • A card made for your story · your score, your rank, your school
  • Levels that add up · every correct answer counts toward your lifetime level
A Zeta event card with code 32590 for Zeta Week, Princeton, Oct 28 to Nov 2.

Events

Make an event. Share five digits.

Name it, pick the community and the day. Zeta gives you a code to post in the group chat, and everyone who joins plays into the same leaderboard.

  • Join with a 5-digit code · no links, no invites
  • Live leaderboard for the day · best verified run per player
  • Your school's all-time board · pick your school by name

Community benchmarks

What a good zetamac score looks like.

70+
Top market makersArithmetic won't be why you're cut.
55–69
Competitive at most prop shopsWhere strong candidates land after prep.
45–54
Workable baselineSerious applicants mid-prep.
<45
Getting startedEveryone starts somewhere. Ten minutes a day moves it.

These are community benchmarks from forums and prep guides. No firm publishes a zetamac cutoff, firms screen on much more than mental math, and Zeta isn't affiliated with any firm.