25m
Steady Burn
The classic focus block. Counts as one session toward the main task, and stopping early still credits the quarters you completed.
+1 sessionFinish it before it blows.A focus timer with a temper.
Rumbleclock turns one vague deadline into a daily pace you can see. Keep up and the volcano naps. Fall behind and it starts to rumble, for real reasons you can read.
For iOS 16+
Works offline
No account
Main task · 7 daysDormant
Pressure 8/100Needed 1.7 a day
Day 1. Two Steady Burns land. The cone sleeps.
Pressure is arithmetic
Four numbers the volcano watches
You give Rumbleclock a task, the last day that counts, how many sessions it needs and how many you can run in a day. Everything the volcano does comes from those four answers and the sessions you actually finish.
Neededper day
The sessions left divided by the days left. Skip a day and the rest of the plan absorbs it, so this number climbs and the pressure with it.
Your pacelast three days
What you really managed lately. Rumbleclock projects it forward into a forecast finish date and tells you whether you are ahead, on pace or slipping.
Safe windowlast recoverable day
The final day you could still finish by working at full capacity. When today is that day, the Seismic feed says so plainly.
Deadlinethe eruption
Reach it with work still inside and the volcano erupts, in cartoon fashion. Nothing is lost: extend the deadline or close the chapter and start fresh.
Five moods and two endings
From Dormant to Critical
Dormant
right on plan
Grumbling
a little behind
Rumbling
drifting off pace
Boiling
vents unlock
Critical
act today
Finish early and the volcano is Tamed, crowned with a rainbow of steam and a pile of bonus shards.
How you cool it down
Pick your burn
50m
Deep Dive
A long protected block worth two sessions and half again the shards. It only counts if you see it through.
+2 sessions10m
Vent
A rescue block that opens once the cone is Boiling. Half a session plus five points of pressure let off as steam.
rescueany
Free Timer
A standalone timer with its own label for anything else. It never touches the main task.
standaloneLengths are adjustable, a short cooldown can follow each finished burn, and the timer keeps running even while the app is closed.
The Obsidian Forge
Shards for every finished burn
Completed sessions pay obsidian shards, more on a daily streak. Spend them on six volcano cones, three timer rings and three skies, then carve twelve marks into the Mark Wall. The Ashlog keeps every burn, the week in columns and every task you have tamed.