Pick a bomb for your 1 hour timer
Any bomb you pick runs for 1 hour. Round Buddy is free to play. Unlock all 50+ bombs and 140+ worlds for $4.99 with no ads. Every bomb is unique! Watch for different animations, sounds, and explosions.
For home
Unlock all 50+ bombs and 140+ worlds
Every bomb is unique, with lots of different booms, and you can put any bomb in any of 140+ animated worlds. Pay once, use on up to 5 devices. Removes all outside ads from this site.
For teachers
Classroom license
Every bomb and every world on up to 30 school devices, for one payment.
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Other timer lengths
One hour is the marathon. This free 1 hour bomb timer covers exams, project blocks, study sessions, screen-time budgets, and countdowns like “the guests arrive in one hour and this house needs a miracle.”
The fuse burns so slowly it reads as calm, which makes it a surprisingly good focus companion: the room can see time passing without feeling chased. The big digits stay readable from anywhere, and the timer keeps perfect time even when the tab is hidden.
For class periods that run shorter, the 30 minute and 20 minute bomb timers cover the usual blocks. And if an hour is somehow not enough, the +30s button can stretch a running timer even further.
Teaching a class? The classroom timer runs the same bombs on the smartboard, with no ads on the page.