# Prefrontal Lab — Focus, memory and logic games

> Focus, memory and logic games (iPhone/iPad app by Ziyu He.)

- Source: https://appshunter.io/ios/app/prefrontal-lab/id6774438286 (this page in markdown: same URL + `.md`)
- Developer: [Ziyu He](https://appshunter.io/developer/1837600075)
- Category: Education, Games, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English
- Released: 2026-09-13
- Data updated: 2026-10-31

## What is Prefrontal Lab?

Prefrontal Lab is a collection of short training games for iPhone. Each round takes about a minute. Open it, play one, put it away. Every feature is open to every player, with no subscription.

SIX GAMES

· Schulte Grid — Tap numbers from 1 to 25 in order.
· Stroop Test — Ignore the word meaning. Choose its actual color.
· N-Back Memory — Decide whether the number matches the one 1 step ago.
· SET Logic — Find 3 cards whose color and shape are all same or all different.
· Neuron Counting — Count every matching target shape, then submit the number.
· Code Logic — Use four clues to find a three-digit code with no repeated digits.

ADVANCED AND ENDLESS

Besides Basic, every game has a harder Advanced mode and an untimed Endless mode you play until you choose to stop. What Advanced changes:
· Schulte Grid — tapped cells leave no mark
· Stroop Test — the color swatch is removed; you choose the written color name instead
· N-Back Memory — 2-Back, matching two steps back
· SET Logic — adds fill level, which must also be all same or all different
· Neuron Counting — more similar, moving distractions
· Code Logic — four-digit codes with no repeated digits

TWENTY-TWO SCHULTE BOARDS

Schulte Grid has a page of its own. Pick a size — 3×3, 4×4, 5×5 or 6×6 — then a way to play it: forward, reverse, evens first, odds first, or blind. There is also a letters board, A through Y, and an Endless mode with no clock. Every board keeps its own best, and the result screen offers the next one to try.

YOUR TEXT SIZE

Set it in Settings ▸ Display & Brightness ▸ Text Size and the app follows, with no restart.

DAILY CHALLENGE

One fixed task per day, the same for everyone. Visual Lightning, Reverse Radar, Color Override, Memory Loop, Logic Calibration, Neural Storm, Letter Maze and Expanded Grid rotate through, each finished in 60 to 120 seconds. Completing it checks in the day and builds your streak.

COGNITIVE ARENA

A continuous mixed run of Schulte Grid, Stroop, quick SET, N-Back and Neuron Counting, in Basic or Advanced, tracking your personal best.

ABOUT YOUR DATA

Prefrontal Lab collects nothing. Your training records, level progress, daily check-ins, language and sound settings are stored only on your own iPhone. Nothing is uploaded, and there is no account to create. There are no ads.

Privacy Policy: https://prefrontal-lab.com/privacy

## Is Prefrontal Lab safe?

Not enough ratings yet to assess Prefrontal Lab.

## Is Prefrontal Lab legit?

Prefrontal Lab has limited verification signals. The AppsHunter Legitimacy Score for Prefrontal Lab is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.0.3 — 2026-10-28

Prefrontal Lab 1.0.3

· Everything is free. Advanced mode, Endless mode, the Advanced Arena and your training history from earlier months are now open to everyone. No subscription needed.

· Schulte Grid has a page of its own, with 22 boards. Pick a size — 3×3, 4×4, 5×5, 6×6 — then a way to play it: forward, reverse, evens first, odds first, or blind, plus the letters board and Endless. Reverse, letters and the 6×6 used to turn up only when the Daily Challenge picked them; now they are always there.

· New 3×3 and 4×4 boards. Bigger cells and bigger digits, for getting started — or for anyone who finds a 5×5 hard to read.

· The app follows your text size. Turn it up in Settings ▸ Display & Brightness ▸ Text Size and the app follows, with no restart. The rules themselves are set larger too.

· After a round, the result screen offers the next board to try — one tap and you are in it.

· The in-game header now names the board you are on and shows that board's own best, instead of one number shared by all of them.

· Fixed: a double beep when starting a round, and a personal best that was judged against a different board's score.

### 1.0.2 — 2026-09-22

What's new in 1.0.2:

New
· Dark mode. Choose System, Light or Dark under My Lab → Appearance.
· Haptics: you now feel both correct and incorrect taps.
· New setting, off by default: Ignore silent switch lets sounds play even when your phone is muted.

Improvements and fixes
· A wrong tap now turns the cell itself red, instead of only flashing an indicator at the top of the screen.
· N-Back: the card pops on every new round, so you can tell a new question started even when the same number repeats.
· Arena: fixed choosing Advanced still starting the Basic game. Advanced is now marked with a lock as Pro content.
· Back buttons are easier to tap in every game, on the pricing screen, and in training records.
· Neuron Count: the instructions now say that both shape and color must match.
· Code Logic: switching to another app no longer ends your round. It picks up where you left off, and time away isn't counted.

All of these come from your feedback. Thank you.

### 1.0 — 2026-09-14

No release notes.

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## Related topics

[prefrontal lab](https://appshunter.io/ios/topics/prefrontal-lab) · [ziyu](https://appshunter.io/ios/topics/ziyu)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*