Comparison
TimerDuel vs Focus Keeper: which Pomodoro timer wins in 2026?
Focus Keeper is a classic 25/5 Pomodoro app. TimerDuel keeps the timed-work idea but replaces the rigid cycle with a chess-clock — your focus and break compete in real time. Here's how they stack up.
Feature comparison
| Feature | TimerDuel | Focus Keeper |
|---|---|---|
| Price | Free, no ads | Free with ads / $1.99 Pro |
| Signup | No | No |
| Platform | Any browser | iOS / Android only |
| Session model | Chess-clock (flexible) | Fixed 25/5 cycles |
| Tracks real focus % | Yes — live | No — assumes you focused |
| Tap-to-switch | Instant | Pause / resume only |
| Long-session friendly | Yes — any length | Locked to cycle structure |
| Honest mid-session | Tap break, no guilt | Pause = breaks the streak |
| Best for | Self-aware students | Habit-stack beginners |
Pick Focus Keeper if…
- • You're new to Pomodoro and want the standard 25/5 rhythm enforced.
- • You study primarily on your phone.
- • You want session-count streaks to motivate you.
Pick TimerDuel if…
- • You've outgrown rigid 25/5 blocks and want flow-friendly timing.
- • You want a real focus-rate metric, not vanity streaks.
- • You study at a laptop and don't want yet another app.
- • You'd rather measure distraction than pretend it didn't happen.
Why the chess-clock beats fixed cycles
Fixed Pomodoros assume your brain enters and exits flow on a 25-minute schedule. It doesn't. Deep-work research (Newport, Csíkszentmihályi) shows flow states often last 45–90 minutes once you're warmed up. A chess-clock lets you ride a 70-minute flow stretch without an interrupting bell — and still gives you an honest break-time count when you finally tap out.
FAQ
Is TimerDuel free like Focus Keeper?
Both have free tiers, but TimerDuel has no premium upsell, no ads, and no signup. Focus Keeper's free version shows ads and limits customization.
Does TimerDuel do classic 25/5 Pomodoros?
Yes, you can run 25/5 cycles in TimerDuel. The difference: when you get distracted mid-Pomodoro, TimerDuel measures it instead of pretending you focused the full 25 minutes.
Which is better for ADHD studying?
Focus Keeper enforces rigid blocks — great if you need external structure. TimerDuel is better if rigid blocks interrupt your flow and you want the timer to adapt to your actual rhythm.
Do I need to install TimerDuel?
No. TimerDuel runs in your browser on phone or laptop. Focus Keeper requires an iOS or Android install.
See your real focus rate
Free, browser-based, takes 5 seconds to start.
Open TimerDuel