Building blocks for your training blocks
Follow a week-by-week plan to your goal time, or build any interval session block by block. rnblox talks you through every rep, so your phone can stay in your pocket.
Free · No account · Works offline
Plans that work out their own paces
Pick a goal and the time you're after. Every session in the plan gets its paces from that time and lands on a dated calendar. Move a run to fit your week, or change it, and it's still your plan.
Every session is a stack of blocks
A warm-up, the reps and the recovery between them, a cool-down. Each block runs for a distance or a time at a pace you commit to, and you hear when each one starts and how the last one went. Start from one of 115 sessions in the library or from a blank page.
Ask your AI, run it here
Copy the rnblox prompt into any AI chat and describe the session you want in your own words. Paste the reply or open from a file, then save, customise, or run the workout with helpful pace cues and pinpoint accurate tracking.
Know your paces before you go
Work out the pace for a goal time, see what a recent race says about the next one, and find where the clock should read at each split. Then build a workout at that pace.
Made for dead zones and deep pockets
Once it has loaded, rnblox runs with no signal. It keeps the screen awake, locks against pocket taps, and keeps your runs on your phone. No account to make.