Pick a bomb for your 30 minute timer
Any bomb you pick runs for 30 minutes. 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
Thirty minutes is the long haul. This free 30 minute bomb timer covers tests, project work, deep-clean missions, and full chore rotations, with a fuse that burns slowly enough to feel calm and a finish that still lands with a bang.
For longer assessments, start the bomb and write checkpoint times on the board next to it. Students get the ambient countdown plus concrete milestones. The timer keeps perfect time even if the tab is hidden for a moment.
Need even more? The 1 hour bomb timer is the longest preset, and the Custom button accepts anything in between. For the opposite end of the scale, the 30 second timer handles lightning rounds.
Teaching a class? The classroom timer runs the same bombs on the smartboard, with no ads on the page.