Karter: Focus Training
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About this app
You can't focus because you never practice focusing.
Karter is a 15-minute daily focus practice: breathe for five minutes, hold one reflection question for five minutes, then test your attention with a simple concentration drill.
No streaks. No badges. No wellness fluff. Just a short daily practice that treats attention like a muscle — something you train, measure, and build.
THE DAILY PRACTICE
1. BREATH — 5 minutes
A paced breathing exercise to settle your mind before you train. Choose box breathing (4-4-4-4), calm breathing (4-7-8), or a simple pattern (4-6).
2. REFLECTION — 5 minutes
One question per day. Not journaling homework — you sit with a single question and let it work. A rotating set of prompts helps you understand what actually drives your attention, energy, and follow-through.
3. DRILL — 5 minutes
A sustained-attention drill based on the same style of task researchers use to measure concentration. It shows you exactly when your mind drifts — and over days, whether your attention span is getting longer.
HONEST PROGRESS
Karter logs your completed sessions and shows your real numbers: sessions completed, drill accuracy, drift counts. No vanity metrics, no guilt mechanics. If you miss a day, you miss a day.
FOCUS TIMER INCLUDED
When it's time to actually work, a built-in focus timer (25/5 Pomodoro-style intervals) helps you put your trained attention to use on deep work.
WHAT KARTER IS NOT
– Not a meditation library with 400 sleep stories.
– Not a habit tracker that shames you with broken streaks.
– Not a subscription trap. Free to use.
PRIVACY, PLAINLY
No ads. No selling data. Usage analytics only if you explicitly say yes — and you can turn it off anytime in Settings. Your email and your practice data are used to run the app, nothing else.
WHO IT'S FOR
People who feel their attention span shrinking — students, knowledge workers, founders, anyone whose work depends on concentration — and who'd rather train for 15 minutes a day than read another productivity article.
Fifteen minutes a day. Sharper thinking within two weeks. Start today's session.
Karter is a 15-minute daily focus practice: breathe for five minutes, hold one reflection question for five minutes, then test your attention with a simple concentration drill.
No streaks. No badges. No wellness fluff. Just a short daily practice that treats attention like a muscle — something you train, measure, and build.
THE DAILY PRACTICE
1. BREATH — 5 minutes
A paced breathing exercise to settle your mind before you train. Choose box breathing (4-4-4-4), calm breathing (4-7-8), or a simple pattern (4-6).
2. REFLECTION — 5 minutes
One question per day. Not journaling homework — you sit with a single question and let it work. A rotating set of prompts helps you understand what actually drives your attention, energy, and follow-through.
3. DRILL — 5 minutes
A sustained-attention drill based on the same style of task researchers use to measure concentration. It shows you exactly when your mind drifts — and over days, whether your attention span is getting longer.
HONEST PROGRESS
Karter logs your completed sessions and shows your real numbers: sessions completed, drill accuracy, drift counts. No vanity metrics, no guilt mechanics. If you miss a day, you miss a day.
FOCUS TIMER INCLUDED
When it's time to actually work, a built-in focus timer (25/5 Pomodoro-style intervals) helps you put your trained attention to use on deep work.
WHAT KARTER IS NOT
– Not a meditation library with 400 sleep stories.
– Not a habit tracker that shames you with broken streaks.
– Not a subscription trap. Free to use.
PRIVACY, PLAINLY
No ads. No selling data. Usage analytics only if you explicitly say yes — and you can turn it off anytime in Settings. Your email and your practice data are used to run the app, nothing else.
WHO IT'S FOR
People who feel their attention span shrinking — students, knowledge workers, founders, anyone whose work depends on concentration — and who'd rather train for 15 minutes a day than read another productivity article.
Fifteen minutes a day. Sharper thinking within two weeks. Start today's session.
Train your focus in 15 minutes a day: breath, one question, attention drill.
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What’s new
Karter 1.0 — the first release.
• The daily practice: 5 minutes of paced breathing, 5 minutes with one reflection question, 5 minutes of attention drill.
• Honest progress tracking from your real sessions.
• Built-in 25/5 focus timer for deep work.
• Free, no ads, analytics only with your consent.
• The daily practice: 5 minutes of paced breathing, 5 minutes with one reflection question, 5 minutes of attention drill.
• Honest progress tracking from your real sessions.
• Built-in 25/5 focus timer for deep work.
• Free, no ads, analytics only with your consent.
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About the developer
Karter Labs LLC
vlad@getkarter.com
30 N Gould St
Sheridan, WY 82801-6317
United States
+972 50-296-4934