What We Learned about time tracking from Elon Musk and 5 successful CEOs
A list of the best time-tracking resources for founders, PMs, and engineers.
How many hours have you worked last week? How much time were you distracted? Cronus helps you answer these questions using context-aware AI (not just rule-based categorization).
See your productivity counting up live. No annoying and rule-based blockers. Sometimes you have to use distracting websites for work. Cronus understands what you are doing and categorizes your work accordingly.
Sensitive information is redacted on your device, so it never reaches our servers.
Enable optional on-device Screen OCR for improved accuracy. The app also works with just window metadata.
I thought I was working 12-hour days, but Cronus showed me the reality. After a gym session and lunch, I was surprised to see three hours had passed.
I used Rize for a while but found it overwhelming and slow. Tried out Cronus and instantly fell in love with the simplicity and speed. That’s how productivity tracking should feel like.
Cronus is refreshingly simple. Open it, and you instantly see where your time is going. It's easy to classify activities on the fly without getting bogged down in categories. The simplest and most effective time tracker I've used.
HUGE fan so far! Funnily enough, I had a 'holy shit, this product is going to be in my life for a long time' moment when I saw everything I'd done laid out in the calendar view.
It used to take me ~2 hours each week to figure out: 1) how many hours I worked, and 2) how much time I was distracted/on social media. Cronus automates it and makes it 10x more accurate.
Cronus showed me exactly how much time I wasted on Hacker News and other distractions. It’s also great for tracking work vs. learning.
Cronus has completely transformed how I manage my time by automatically tracking my work and distractions with impressive accuracy - really helped me getting more done.
As a PM, context switching is constant — meetings, docs, Slack, planning. Cronus helps me protect focus time and make better use of deep work hours.
I love having an overview of how much time I work on each one of my projects and Cronus does an amazing job at it. It also helps me stay focused, seeing the distraction timer pop up gets me back to work instantly.
I thought I was working 12-hour days, but Cronus showed me the reality. After a gym session and lunch, I was surprised to see three hours had passed.
I used Rize for a while but found it overwhelming and slow. Tried out Cronus and instantly fell in love with the simplicity and speed. That’s how productivity tracking should feel like.
Cronus is refreshingly simple. Open it, and you instantly see where your time is going. It's easy to classify activities on the fly without getting bogged down in categories. The simplest and most effective time tracker I've used.
HUGE fan so far! Funnily enough, I had a 'holy shit, this product is going to be in my life for a long time' moment when I saw everything I'd done laid out in the calendar view.
It used to take me ~2 hours each week to figure out: 1) how many hours I worked, and 2) how much time I was distracted/on social media. Cronus automates it and makes it 10x more accurate.
Cronus showed me exactly how much time I wasted on Hacker News and other distractions. It’s also great for tracking work vs. learning.
Cronus has completely transformed how I manage my time by automatically tracking my work and distractions with impressive accuracy - really helped me getting more done.
As a PM, context switching is constant — meetings, docs, Slack, planning. Cronus helps me protect focus time and make better use of deep work hours.
I love having an overview of how much time I work on each one of my projects and Cronus does an amazing job at it. It also helps me stay focused, seeing the distraction timer pop up gets me back to work instantly.
Went to a conference, had dinner with friends? Cronus helps you track your non-computer time using your calendar for context, or create manual entries in one click.
Cronus understands your distraction and productivity patterns, helping you avoid the root causes and reach your daily and life goals.
Cronus is the first cross-platform time and distraction tracking software. See how productive you were across all your devices in one dashboard (coming soon).
Cronus is not rule-based. Sometimes you need to go on LinkedIn or Twitter to look at people's profiles or just catch up with your network. However, doom scrolling is categorized as a distraction.
Insights on productivity, time management, and building better focus habits.
A list of the best time-tracking resources for founders, PMs, and engineers.
The science of why time flies (and how to make your days feel longer again).
Looking to switch from Rize? Here are the top 3 alternatives in 2025, including why Cronus is the clear winner for AI-powered time tracking.
A list of the best AI time tracking tools for 2025. Includes Cronus, Rize, RescueTime, Early (Timeular), Memtime, Timely, and ManicTime.