CALFBOSS

Your calves
have a
number.

Your iPhone counts the reps.

Hold it flat at belly-button height and do a set of calf raises. CalfBoss counts the reps live, with the sensors already in your phone.

Coming soon on the App Store

How it counts

Your iPhone counts the reps

Hold the phone flat at belly-button height, screen facing you, and do your calf raises. The motion sensors inside your iPhone follow you as you rise and lower, and the count goes up on the screen as you go. All it needs is the iPhone in your hand.

Counting runs on the phone itself. The motion readings stay on your iPhone.

  1. 3, 2, 1

    Tap Start set. A three-second countdown gives you time to hold the phone flat and put a hand on the wall while the sensors warm up.

    Countdown screen: a large outlined 3 and the line Phone flat at belly-button height, with a Cancel button.

  2. Reps count live

    The phone counts your reps as you rise and lower. The count fills the screen, with your highest at this weight under it. Pass it and the count turns orange, with one buzz.

    Counting screen: the live count 27, Highest 41 under it, with Pause set and Finish set buttons.

  3. Finish set saves it

    Go until another full rep isn't possible, then tap Finish set. The set is saved at once, a new record shows as one, and the app goes back to Today by itself.

    Result screen: a check ring, New record, the count 44 as an orange outline, and 3 more than your highest.

Calf work for the hours outside the gym

Short sets through the day add up to real weekly volume on top of what you do at the gym. A typical weekday:

  1. A reminder: “Time for a set.” Tap it and Track set opens on your last weight.

  2. Another set between calls. Some days with a 10 kg backpack.

  3. Hands are on the machine, so you log the set by hand: machine, reps, weight. It opens on last time's values, so a new gym set is three taps.

  4. Open Progress and look at the weeks.

Reminders are optional: pick a time window and 3, 5 or 8 a day.

Log by hand: exercise chips with Leg press selected, reps 16, weight 100 kg, and a Save set button.

Records update by themselves

A record is the most reps in one set at one weight. CalfBoss keeps one for every extra weight and every gym machine, so each weight has its own record.

  • Calf raises

    11:42 · +20 kg

    ↑ +3 at this weight

    44

  • Calf raises

    09:05 · +25 kg

    First set at +25 kg

    12

Progress shows both ways forward, more reps at the same weight or a first set at a heavier one, with your highest set week by week.

Progress screen: week cards, highest set 41 reps with no extra weight, +3 versus 38, and a trend line over 8 weeks.

It records. You decide.

CalfBoss keeps your sets and shows them back as they happened. How many sets you do, and when, is your call.

Your sets stay on your iPhone

  • Straight in

    Open the app and start a set right away.

  • Yours alone

    Your sets, body weight and reminders stay on your iPhone, where only you see them.

  • Purchases only

    Apple and RevenueCat handle the subscription and see only the purchase and an anonymous ID.

Read the privacy policy

Questions

Where can I do a set?

Anywhere with a wall: at home, at work, between calls. A step edge gives a deeper stretch, and a backpack adds weight when you want more.

Where do I hold the phone?

Flat at belly-button height, screen facing you, with your other hand on a wall for balance. The counter is tuned for that position.

Can I change a set afterwards?

Yes. Tap the set on Today to change its reps, weight or time, or swipe it to repeat or delete it.

Can I log one-leg sets?

Yes, by hand: Log by hand has a One leg exercise, with reps per leg. The phone counts standing calf raises.

How does the subscription work?

Yearly or weekly subscription; the price shows in the app before you pay. Cancel any time in iPhone Settings.

How hard should a set be?

Go until another full rep isn't possible. A burning muscle is normal. Pain in your heel or Achilles means stop and rest.

What do I need?

An iPhone and a wall to touch for balance. A backpack or a dumbbell is optional, for extra weight.

What happens to my sets if I change phones?

Your sets are part of your normal encrypted iPhone backup, so they move with it. You can also export every set as a CSV file from Settings.

Can you hit 25?

Coming soon on the App Store