Simple by default
Practice should be easy to begin and clear enough to repeat without unnecessary feature bloat.
Practical cognitive practice
Tools that make focused practice easier to repeat.
Quartenson builds browser tools and apps for visual scanning, attention, reaction time, memory, and long-term progress review. We focus on clear practice, useful feedback, and honest interpretation.
Why Quartenson exists
Practice should lead to useful context, not just another score.
Cognitive practice is easy to start and much harder to make consistent. Many tools give you a result, but offer little help with repeating comparable sessions or understanding what changed.
Quartenson is being built around a more practical approach: focused exercises, clear settings, meaningful session history, and progress views that help people notice patterns over time.
Quartenson is not a diagnostic service and does not promise guaranteed improvement. Our aim is to build useful practice products that respect uncertainty and make results easier to review.
How we build
Simple products, careful comparisons, and honest expectations.
These principles guide product decisions across Quartenson apps, browser tools, and educational content.
Progress needs context
Comparable settings, repeated sessions, accuracy, and consistency matter more than one unusually fast result.
Claims should stay grounded
We avoid medical, diagnostic, IQ, and guaranteed-improvement claims, and explain limitations where they matter.
Privacy should be understandable
For browser tools, personal settings and practice histories stay on your device and are not sent with analytics events.
What comes next
Building the Quartenson product family step by step.
The roadmap stays intentionally focused. New products should add a clear practice purpose instead of expanding the catalog for its own sake.
Free browser tools
Five focused tools for Schulte tables, visual search, visual memory, peripheral awareness, and reaction time.
Quartenson: Schulte Tables
An Android app for structured Schulte table practice, history, pace analysis, and weekly progress review.
More focused trainers
Future product areas include memory, reaction, focus, and reading practice. No release dates are being promised yet.
Founder note
A note from the founder
My goal with Quartenson is to build cognitive practice tools that go beyond providing a single score. I want them to help people follow their progress over time, understand their results, and practice at a level that reflects their current abilities.
Good practice should evolve with the person using it. As performance changes, the difficulty should adapt so that each session remains challenging, focused, and worthwhile without becoming arbitrary or discouraging.
That is the direction behind Quartenson: clear feedback, meaningful progress tracking, and thoughtfully adaptive practice.
Social Updates
Follow Quartenson
We share updates about free cognitive training tools, browser experiments, and Quartenson: Schulte Tables progress.
Practice with Quartenson
Choose where to begin.
Start with a free browser exercise, or explore Quartenson apps for structured practice and longer-term progress review.
Our apps
Explore Quartenson apps built around structured practice, useful feedback, and longer-term progress review.
Schulte table training with progress
History, heatmaps, pace, and weekly review
History • Heatmaps • Progress
Quartenson: Schulte Tables
Available nowTrain Schulte tables on Android with session history, pace patterns, heatmaps, achievements, and weekly progress review.
Explore Schulte TablesStart with a free browser tool
Short, accessible exercises for Schulte tables, visual search, visual memory, peripheral awareness, and reaction time.
Free Schulte Table Trainer
Find the numbers in order
Focus • Scanning • Speed
Free Schulte Table Trainer
Browser toolGoal: Cleaner 5x5 rounds with fewer mistakes
Practice Schulte tables online with a simple browser grid. Choose 3x3 through 7x7, track time and mistakes, and use pause, shuffle, and keyboard controls for quick focus sessions.
Start Free TrainerVisual Search Test
Find the target among distractors
Speed • Accuracy • Focus
Visual Search Test
Browser toolGoal: Faster target spotting with better accuracy
Find one target among similar symbols, letters, or numbers. Complete ten short rounds and track median response time, accuracy, and clean results.
Start Visual Search TestVisual Memory Test
Remember sequences or patterns
Memory • Focus • Levels
Visual Memory Test
Browser toolGoal: Better visual sequence and pattern recall
Choose ordered sequence or 3-second pattern recall, progress through levels, choose difficulty, track your best level, and compare recent local sessions.
Start Memory TestStory Chain Memory Trainer
Link items into one connected story
Build • Recall • Repair
Story Chain Memory Trainer
Browser toolGoal: Recall a short ordered list through connected links
Build a connected story for 4 to 8 items, hide the list, recall it in order, identify the first broken link, and retest after focused repair.
Start Story Chain TrainerPeg System Memory Trainer
Link numbered pegs to temporary targets
Review • Recall • Repair
Permanent Peg System positions
- 1bun
- 2shoe
- 3tree
- 4door
- 5hive
- 6sticks
- 7heaven
- 8gate
- 9vine
- 10hen
Peg System Memory Trainer
Browser toolGoal: Retrieve a short target list by numbered position
Learn 5 or 10 permanent memory pegs, attach a generated or custom list, test positions in random order, repair weak associations, and retest for free.
Start Peg System TrainerChunking Memory Trainer
Group, recall, and reconstruct
Meaningful groups • Exact order • Repair
Meaningful groups
Fruit1-3
- 1apple
- 2pear
- 3plum
Travel4-6
- 4ticket
- 5map
- 6train
Chunking Memory Trainer
Browser toolGoal: Recall an ordered list through meaningful groups
Practise 6, 9, or 12 words, digits, or private custom items. Build useful groups, hide the list, reconstruct every position, compare chunks, and repair weak groups.
Start Chunking TrainerPeripheral Awareness Trainer
Notice brief off-centre targets
Awareness • Accuracy • Focus
Peripheral Awareness Trainer
Browser toolGoal: Off-center awareness while holding focus
Keep attention near the centre while noticing brief off-centre targets. Complete a dual task and review central, peripheral, and combined accuracy.
Start Awareness ExerciseReaction Time Test
Respond to one visual signal
Median • Fastest • Spread
Reaction Time Test
Browser toolGoal: Response-speed measurement for one visual signal
Wait for an unpredictable visual signal, then respond as quickly as you can. Choose 1 to 10 trials and review your median, average, fastest time, and false starts.
Test Reaction Time