MicroTools

Number Memory Trainer

Grow your digit span level by level with a Flash mode and local leaderboard.

Level: 3Best: 0

Memorize the number, then type it.

About Number Memory Trainer

Progressive digit-span trainer that grows your working memory one digit at a time. Starts at 3 digits and rises to 5, 10, 20+ — each correct recall unlocks the next level. Two modes: Normal (display time scales with length) and Flash (every number shown for only 0.5 seconds). Local leaderboard tracks your top 10 results per mode.

How to Use

  1. 1Choose Normal or Flash mode.
  2. 2Click Start. A number appears for a few seconds, then disappears.
  3. 3Type the digits exactly and press Enter.
  4. 4Each correct answer adds one digit; one mistake ends the run.
  5. 5Beat your best level to climb the local leaderboard.

Frequently Asked Questions

What is digit span?
Digit span is the longest sequence of digits you can recall after a single presentation. Average adults reach 7 ± 2 digits. Sustained training can push that span higher.
What is Flash mode?
In Flash mode every number is shown for exactly 0.5 seconds, regardless of length. It tests rapid encoding and chunking, not just rehearsal.
How is the leaderboard ranked?
Each finished round adds an entry with the level you reached. The top 10 entries (by date) are kept in localStorage on your device.
Does the test send data anywhere?
No — every result and leaderboard entry stays in your browser's localStorage.

Tool Info

Category
psychology
Usage
Unlimited

Related Tools

Memory Test

Test your short-term memory with digit span, visual patterns, and word recall.

Chunking Trainer

Learn to chunk long numbers (938472910 → 938-472-910). Score your chunking quality.

Daily Memory Challenge

One 8-digit memory puzzle a day. Same for everyone. Streak resets if you miss.

More psychology tools

Memory Test

Test your short-term memory with digit span, visual patterns, and word recall.

Brain Age Test

Estimate your brain age with 4 cognitive mini-tests and a performance radar chart.

Focus Test

Tap only when you see "A" — test selective attention, reaction speed, and focus.

Personality Snapshot

Discover your personality type with traits, a radar chart, and a shareable result card.