IronCap

not connected 🔋 — — Hz

🏋️ Workout

📚 History

📡 Data

START SETor click the button on the cap

Current set —

press “start set”

—

eccentric

—

sec / rep

0:00

duration

Today 0:00

sets

reps

exercises

Set finished✕

−

reps

−

weight · optional

Which exercise was this?

Save Discard

Settings✕

Audio“Beeps only” never ducks your music

Volume

Keep screen awake

Rest timer, s

Always confirm rep countkeep ON while collecting training data — every confirmation teaches the counter

Min eccentric time, s

Auto-start setsstarts counting when a steady rhythm appears, and back-fills the reps you already did

Auto-stop set after, sstillness longer than this ends the set

Battery saverhalves the sensor rate to 52 Hz — longer battery, but may miss fast reps. Reconnect to apply

Training partnersShare one sensor and take turns. The turn passes automatically after each set; records and weights stay separate per person. Names stay on this phone — uploads carry only the anonymous id.

Add

Coach syncAfter you finish a workout, the session data is sent to a Telegram chat. Leave the fields empty to keep everything on this phone.

Anonymous idgroups your sets together without naming you. No name, no device id, no clock times are ever sent. New id

Collector URLOptional. Paste the address of your collector and workouts upload themselves. It is not a secret — no token ever sits on this phone.

Test Upload last

📤 Share last workout

No URL? Use Share — it hands the file to Telegram, mail or anything else, with nothing to set up.

See exactly what gets sent

Finish workout

Erase all data

Button on the cap:
1 click — start / finish a set
2 clicks — cancel the set (don't count it)
hold ~1.2 s — finish the workout

Nothing is counted outside a set, so walking between machines and racking the weight never reach your stats.

iOS: needs the Bluefy browser — Safari has no Web Bluetooth. If your sensor doesn't appear, wake it first (most sleep to save the cell).

Supported sensors: any Nordic UART (NUS) compatible IMU beacon that streams accelerometer + gyroscope — e.g. Holyiot / MINEW nRF52 beacons, or the Żabka bottle-cap puck. You connect your own device; IronCap only reads its motion stream.

build dev

Export✕

Select all and copy, or use the button below.

Copy

Stick a motion sensor on the weight. Lift. The reps count themselves — no buttons mid-set, no phone in your hand.

1 · Wake the sensorpress its button, then tap Connect

2 · Magnet it to the weightstack, plate or bar — orientation doesn't matter

3 · Just start liftinga steady rhythm starts the set and counts back the reps you already did

4 · Confirm the counttap − / + if it got it wrong — that's how it learns

Let's go