90 Minute Timer
The Ultradian Sprint a high-capacity 90 Minute Focus Timer and Deep Work Engine engineered for peak cognitive immersion and significant project breakthroughs.
This is just a basic timer. Want tasks, ambient sounds, Pomodoro sessions and focus stats on your phone?Download Blazetimer 🚀
What is a 90 minute timer
The 90-minute timer is rooted in the research of sleep researcher Nathaniel Kleitman, who discovered the Basic Rest-Activity Cycle (BRAC). Just as our brains move through 90-minute stages during sleep, they operate in 90-minute ultradian waves of high-frequency brain activity during the day. By timing your work in 5,400-second blocks, you are working with your biology rather than against it. This duration provides enough time to move past the initial 15-minute context loading phase and spend a full hour in a state of Deep Flow. Whether youre using it to architect a new feature for a product like ApplyGigs, time a steady-state endurance run, slow-roast a complex meal, or give yourself a hard deadline to clear a significant portion of your project backlog, the 90-minute timer is the ultimate tool for high-impact results.
What people use a 90 minute timer for.
Complex Feature Engineering
For product designers and makers, 90 minutes is the sacred window. It provides enough space to hold complex logic in your working memory like refactoring a database or designing a multi-screen UI flow without the jarring interruption of a shorter timer.
The Endurance Foundation
Ninety minutes of steady-state exercise like a long jog, swim, or cycle is the point where the body significantly improves its mitochondrial efficiency and cardiovascular power. It is the ultimate reset for a sedentary workday.
Deep Subject Mastery
Use 90 minutes to go down the rabbit hole of a new technology or market trend. This duration allows for deep reading, intensive note-taking, and the synthesis of ideas that shorter bursts simply cannot facilitate.
Environmental Transformation
Unlike a quick 10-minute tidy, 90 minutes is enough to actually scrub. You can fully deep-clean a kitchen, organize a garage workbench, or process and put away multiple loads of laundry.
The Slow-Roast Standard
In the kitchen, 90 minutes is the magic number for perfectly roasted whole chickens, baking a dense sourdough boule, or simmering a complex bone broth to extract maximum nutrients and flavor.
The Weekly Review
Set the timer for 90 minutes every Sunday. Use this time to audit your SaaS subscriptions, review your product metrics (for projects like NoteDrill or Blazetimer), and map out your Big Rocks for the coming week.
You're using a basic timer.Blazetimer is a focus system.
Basic browser timer
- ✓Simple countdown timer
- ✓Start, pause, reset
Blazetimer PRO
- ✓The Full Focus System
- ✓Pomodoro sessions (25 min + breaks)
- ✓Task manager + GTD inbox
- ✓Ambient sounds, rain, white noise
- ✓Focus stats + daily charts
- ✓Live Activities + Dynamic Island
- ✓Home screen widgets
- ✓Works offline. Always in your pocket.
3 things a browser timer
will never do.
Live on your lock screen
Blazetimer uses iOS Live Activities to keep your timer visible on your Lock Screen and in the Dynamic Island. You never have to unlock your phone to check the time.
Knows your timing
A browser timer has no idea why you're timing 2 minutes. Blazetimer ties every session to a task — so you build a real record of where your time goes.
Builds focus over time
Every session you complete in Blazetimer adds to your focus stats. You can see your daily, weekly, and monthly focus time grow.
They started with a
browser timer too.
⭐⭐⭐⭐⭐ 4.8 rating on the App Store
As someone with ADHD, this is the first productivity app that actually works for me. The visual timer and automatic breaks mean I don't have to make decisions — I just start and the app takes care of everything
I've tried every Pomodoro app on the market. Blazetimer is the only one that combines a proper timer with real task management. My work output has genuinely doubled since I started using it.
The strict mode is a game changer for me. I used to stop my timers constantly when things got difficult. Now I can't and it's taught me that I can actually push through. My exam scores have improved
Need a Different
Countdown?
All free. All instant. Or download the app for all of them in one place.
You've been using a Stopwatch. Try a Focus System.
Blazetimer combines your timer, tasks, sounds, and stats in one app designed for people who actually struggle to focus.