Every screen. Zero fluff.
Swipe or use arrows to explore the full app.
Live capacity ring + active grind list with real-time progress
See it in action
A 90-second walkthrough of the full grind flow.
Built for the serial grinder
Ops-grade controls in a mobile form factor.
Live capacity ring
An SVG donut gauge shows real-time compute utilisation across all parallel sessions. Red when saturated, orange when healthy.
Multi-session grinds
Each grind spawns 1–8 parallel Claude sessions. More sessions = faster throughput. You control the throttle.
Priority lanes
High, normal, or low priority. High-priority grinds run at 1.5× the speed multiplier and jump to the front of the queue.
Time-block scheduling
Queue grinds to specific windows: quiet morning hours, peak afternoon slots, or low-load overnight runs.
Token usage log
Completed grinds record token count, duration, and session count. Know exactly what you spent and what you got.
Live progress simulation
Grinds tick in real time so you always know where you are. Pause, resume, or cancel any active session mid-run.
The intelligence layer
Today Grindstone is a scheduler. Tomorrow it is an autonomous orchestrator. Here’s what’s shipping next.
Dependency graph resolver
Declare grind dependencies — Grindstone waits for auth to pass before spawning downstream tasks automatically.
PlannedSmart window routing
AI-analysed historical token costs route expensive grinds to quiet windows and cheap tasks to peak hours automatically.
PlannedBudget forecasting
Predict token spend for a queued batch before you kick it off. Hard budget caps halt grinds when the ceiling is hit.
PlannedContext-aware checkpointing
Long-running grinds snapshot intermediate state. Resume from any checkpoint if a session is interrupted or cancelled.
PlannedFollow the build
Grindstone is app #17 in the 100 Apps 100 Hours sprint — built, screen-recorded, and shipped in real time. Follow along for daily drops, design breakdowns, and raw build footage.
Running parallel Claude sessions today?
Get on the list — Grindstone will be the tool you didn’t know you needed.
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