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Why ctrl

The benefits of ctrl

A key like nothing you have tried.

ctrl is a physical key for your digital life. It was built on one idea. The decision to be present should take one second, not constant willpower.

Designed in Germany by four founders who wanted their evenings back. A key of aluminum and ceramic, a free app, and a philosophy that puts people first. Your phone stays useful. Your attention stays yours.

Woman at dusk holding the ctrl key gently against her cheek

90.7 percent improved in at least one of three measured outcomes when mobile internet was blocked on their smartphone for two weeks1

Our philosophy

The point is your life, not the absence of your phone.

ctrl grew out of a simple belief. A good life with technology is about balance, not extremes. We will not tell you your phone is bad. We built ctrl for the moments you want to give your full self to, and we stay honest about what one small key can and cannot do.

Man standing calmly at a window in the evening with the ctrl key on an orange cord Calm
Week in reviewSunday · Life Score

Steady

Your Life Score closed the week at 72. It rose most on the quiet evenings.

Warm wooden desk with the ctrl app on an iPhone next to the ctrl key and books Focus
Week in reviewSunday · Time in ctrl

Present

26 hours in ctrl this week. Tuesday held your longest stretch at 5h 6m.

Close up of a woman holding the orange cord of her ctrl key on her shoulder Together
L
Week in reviewSunday · Momentum

Rhythm

Twelve days in a row now. The streak grew a little every evening.

Measured, not guessed

We read the research so you do not have to.

58

device interactions a day at the median, measured in a German sample of 1,797 adults.2

~144

app episodes a day at the median in the Android logs. Many small sessions add up.3

6.4min

was the typical session length in the Android logs. Distraction often arrives in short fragments.4

What actually changes

Real effects, honestly framed.

No miracle claims. These are measured results from published studies, next to what German data says about the problem itself.

57%

fewer completed openings of selected target apps with one sec

Non-randomized one sec field study · 280 active users · six weeks5

90.7%

improvement in at least one of three measured outcomes

randomized trial, two weeks without mobile internet1

30%

of German teens are tired in the morning from their phone at night

JIM study 20256

84%

of 18 to 24 year olds say their own use is too high

Deloitte Germany 20247

Your attention is not broken.

A large meta-analysis found no decline in attention performance.8 Your environment got louder. That is fixable.

Material

Design is part of our DNA.

The Key is a solid piece of precision-milled aluminum with a matte white ceramic face. There is no battery and no charging, so there is nothing to keep alive. It is made to outlast the habit it replaces and to still feel right in your hand years from now.

Front view of the ctrl key in precision-milled aluminum with white ceramic face
Precision-milled aluminum body
Low angle view of the ctrl key showing the engraved edition number on its side
A numbered edition of 500
Top view of the white ceramic face with the ctrl lettering and caret
Matte white ceramic face, ctrl cut deep
Exploded view of the ctrl key showing ceramic cap, NFC coil, weight plate and aluminum shell
Inside, an NFC coil and aluminum. No battery, ever.

It compounds

The longer you use it, the more it gives back.

ctrl does not nag. The app quietly keeps score of the time you take back, and the picture gets better every week.

Your progressWeek 1
5days in ctrl
14htime won back

Day 5 of about 66 to a formed habit

Illustrative app views, not measurements.

See what it changes

  1. Castelo et al. (2025): Randomized trial published in PNAS Nexus. Two weeks without mobile internet on the smartphone improved subjective wellbeing, mental health and objectively measured sustained attention. 90.7 percent of participants improved in at least one of the three outcomes. Source↗
  2. Tóth, Parry and Emmer (2025): Measured smartphone use in a quota-targeted German adult sample, n = 1,797, including 1,103 Android and 694 iOS users. The median was about 58 device interactions a day. Source↗
  3. Tóth, Parry and Emmer (2025): In the Android logs, the median was about 144 app episodes a day. Source↗
  4. Tóth, Parry and Emmer (2025): A typical Android session lasted a median of about 384 seconds, or 6.4 minutes. Source↗
  5. Grüning, Riedel and Lorenz-Spreen (2023): Non-randomized field study with a self-selected cohort. Among 280 users who kept using one sec throughout, completed openings of selected target apps were 57 percent lower after six weeks than in week one. Source↗
  6. Medienpädagogischer Forschungsverbund Südwest (2025): JIM-Studie. About 30 percent of teenagers in Germany say they are often tired in the morning because they were on their phone late at night. Source↗
  7. Deloitte Deutschland (2024): Smartphone survey Germany. 84 percent of 18 to 24 year olds rate their own smartphone use as too high, and 93 percent of this group report negative side effects. Source↗
  8. Andrzejewski et al. (2024): Meta-analysis of the d2 test of attention. 287 samples from 32 countries with about 21,000 people found no decline in attention performance. Source↗

Where the research is correlational, we say linked, not caused. We never round numbers in our favor.

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From the blogFor something, not against something

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