Summary of the Article
There is no single best focus app. The right pick depends on what actually breaks your concentration: a phone you keep checking, work you can't start, a schedule that eats your deep work, or a noisy environment.
- Kohru: focus sessions that block phone and laptop distractions, with to-do lists turned into sessions and a Chrome extension; built for students and everyday deep work.
- Freedom: cross-device app, website, and internet blocking with a hard Locked Mode; paid plans beyond a free tier.
- Forest: a gamified timer where leaving the app kills your tree; best for phone addiction.
- Opal: iPhone-first screen-time control with friction that makes unblocking annoying.
- Flocus: an aesthetic browser dashboard with a pomodoro timer; fits habit-driven people who want focus to feel good.
- Reclaim.ai: AI that schedules and defends focus time on your calendar; best when meetings are the problem.
- Cold Turkey: strict desktop website and app blocking with a one-time purchase; no mobile support.
- Brain.fm: science-backed focus music for readers whose distraction is sound, not apps.
A 2025 randomized trial in PNAS Nexus found that blocking mobile internet on smartphones for two weeks improved sustained attention, mental health, and well-being, with 91% of participants improving on at least one outcome. Blocking works. The question is which tool matches your failure mode.
How Focus Apps Actually Work
Most focus apps fall into one of five categories, and knowing your category matters more than any ranking:
- Blockers stop apps and websites during a session. Strong enforcement, honest tradeoff: you can often undo them, or pay to make that harder.
- Timers structure work into sessions with breaks, like the Pomodoro method. Light enforcement; they rely on your buy-in.
- Gamified apps turn focus into a game or streak, so skipping costs you something visible.
- Calendar-level tools defend focus time before your day fills with meetings.
- Audio apps replace distracting sound with music engineered for concentration.
If your focus breaks on your phone, you need a blocker. If it breaks before you start, you need structure or a task-to-session workflow. If meetings own your calendar, you need scheduling defense. The rest of this list is organized that way.
Kohru: Focus Sessions That Block Phone and Laptop Together
Kohru is a study and productivity app built around a simple loop: pick a task, start a focus session, and let the app block distracting apps and websites on your phone and laptop while you work.
What it covers:
- Session blocking across devices. Kohru blocks distracting apps and websites during focus sessions, and a Chrome extension extends those sessions to your browser, so the block follows you from phone to laptop.
- Tasks become sessions. Items from your Work and Personal lists turn directly into focus sessions, which helps most when your real problem is starting. Smart to-do lists handle planning and organizing.
- Habit and progress tracking. Kohru tracks habits, focus time, completed tasks, and progress, so a week of sessions shows up as visible proof rather than a vague feeling.
- Built for the audience it serves. Kohru supports people with ADHD and other attention-regulation and task-initiation challenges, alongside students and young professionals.
Best fit: students and working students who get pulled off task by their phone and laptop at the same time. Tradeoff to know: Kohru is an all-in-one app, so if you already love a separate calendar tool or desktop-only blocker, you'll be running two systems. Check the current options and downloads on the Kohru site.
Freedom: Cross-Device Blocking With a Hard Lock
Freedom syncs one blocking session across Mac, Windows, iOS, Android, and Chromebook, so the block follows you when you switch screens. On its premium page, the free tier covers blocking, custom blocklists, and unlimited devices; sessions longer than two hours, scheduled and recurring sessions, and Locked Mode require Premium, which runs $8.99/month or $39.99/year, with a $199 lifetime option.
Locked Mode is the reason people pick Freedom: it prevents you from quitting a session mid-block. That's the honest answer to "I just turn the blocker off." Best fit: multi-device users who want strict, scheduled enforcement. Tradeoff: it blocks, it doesn't plan; there's no task list turning into sessions.
Forest: Gamified Focus for Phone Addiction
Forest is a pomodoro timer with stakes: pick a session length, and a virtual tree grows while you focus. Leave the app and the tree dies. Completed trees build a visible forest, and the paid tier can plant real trees.
The core experience is free, including the timer, app blocking via Deep Focus mode, and group focus rooms; an optional Plus subscription unlocks features like custom allowlists and full analytics, with pricing that varies by region. Best fit: people whose phone is the specific problem and who respond better to loss aversion than to a plain timer. Tradeoff: willpower-based rather than hard blocking, so a determined quitter can still walk away.
Opal: iPhone Screen Time Control With Friction
Opal is an iPhone-first screen time app (it also runs on Mac and Android) that blocks apps through sessions, schedules, and time limits. Its signature trick is friction: making it deliberately annoying to unblock yourself, with paid "Hard Mode" options that remove unblocks entirely.
Per Opal's pricing page, there's a free tier with one rule, and Pro from $8.29/month billed annually, with monthly and lifetime options; students can get up to 50% off. Best fit: iPhone users who want screen-time control with real teeth and a weekly focus report. Tradeoff: iPhone-centric, so it's weaker as a laptop-focused deep work tool.
