Deep work is long, uninterrupted, cognitively demanding work. Cal Newport's framing, and the reason 25-minute Pomodoros are the wrong shape for it — a 25-minute block ends around the time you have finished loading the problem into memory.
Deep work needs three separate things, and most roundups conflate them:
- Structure — a timer long enough to matter, and a record of whether the blocks happened
- Protection — something that stops the interruption arriving
- Sustain — an audio environment that holds attention for 90 minutes
Almost no app does all three. Build a small stack instead.
I run Peazehub, which covers the first one.
The comparison
| App | Job | Platforms | 3-year cost |
|---|---|---|---|
| Peazehub | Structure + record | Web (PWA) | $29.99 |
| Session | Structure + blocking | Apple only | Varies |
| Focus To-Do | Structure + tasks | All platforms | $11.99 |
| Freedom | Blocking everywhere | All platforms | Varies |
| Forest | Phone blocking | iOS, Android | ~$4 |
| Brain.fm | Audio | iOS, Android, web | $209.97 |
| Toggl Track | Billable time records | All platforms | $324+ |
| Focusmate | Human accountability | Web | $288 |
Structure: intervals long enough to be deep work
The interval is the decision. For deep work the credible options are:
- 50/10 — the shortest block that qualifies. Good for writing and code.
- 52/17 — from time-tracking research on high-output workers.
- 90/20 — one full ultradian cycle. The longest most people sustain.
- 90/30 (Monk Mode) — two blocks, long recovery between.
Peazehub — structure with a record
$29.99 one-time · Web
Runs all four of those intervals as presets, and records what completed: lifetime focus hours, a heatmap, streaks. Breaks and abandoned sessions are excluded, so the hours total reflects actual focus rather than time with an app open.
For deep work specifically, the record is the useful half. Deep work capacity is trainable, and you cannot tell whether it is improving without a number that goes back months.
Falls short on: no blocking, and web only for now — native iOS and Android apps are in development, included in the same one-time payment. Pair it with Freedom or Forest for blocking.
Session — structure with blocking, on Apple
Paid, varies · iOS, iPadOS, macOS
The rare app that does two jobs: intervals plus an integrated app and website blocker, synced across iPhone, iPad and Mac.
Falls short on: Apple only, and no long-run community or comparison.
Focus To-Do — structure with tasks
$11.99 lifetime · every platform
If your deep work is project-shaped and you want the task list beside the timer, this covers both at a one-time price.
Falls short on: no blocking, thin analytics for long-run tracking.
Protection: stopping the interruption
A 90-minute block dies at minute 12 to a notification. This is the part people skip and then blame their concentration for.
Freedom — blocking across every device
Subscription, with a lifetime option · every platform
Blocks sites and apps across desktop and mobile simultaneously, which matters because a laptop blocker just moves the problem to your phone.
Falls short on: blocking only. It removes distraction; it does not structure or record the work.
Forest — blocking the phone specifically
~$4 one-time · iOS, Android
Cheaper and narrower. If the phone is the whole problem, this is the cheapest fix in this article.
Falls short on: does nothing about your laptop.
Sustain: audio for long blocks
Brain.fm — functional music
$9.99/month or $69.99/year · iOS, Android, web
Audio designed for sustained attention rather than enjoyment. People who respond to it tend to respond strongly.
Falls short on: $209.97 over three years, for audio alone. Try free ambient or lo-fi first — our timer includes it — and only pay if the free version demonstrably is not working.
Two that get recommended for deep work and should not be
Toggl Track is a billable-hours tracker. It is excellent at that job and it is not a focus tool — no interval structure, no protection, and $324+ over three years on the entry paid plan. If you are not invoicing anyone, this is the wrong category.
Focusmate is real accountability, but 25, 50 and 75-minute booked video calls with a stranger cut against deep work's requirement for unbroken, unscheduled time. It is better suited to starting tasks you are avoiding than to sustaining long blocks.
The stack, and what it costs
The full three-job stack, cheapest credible version:
| Job | Pick | Cost |
|---|---|---|
| Structure + record | Peazehub | $29.99 once |
| Protection | Forest | ~$4 once |
| Sustain | Free lo-fi or ambient | $0 |
About $34, once, for all three jobs.
The subscription version of the same stack — Focusmate plus Freedom plus Brain.fm — runs past $500 over three years. It is not five times better. It is the same three jobs with a recurring bill attached.
Deep work is a practice you are building over years. The tooling for it should be a one-off decision you stop thinking about, not a set of renewals.