Plankan

Get to five 2-minute planks

One fixed ladder from your first timed hold to five 2-minute front planks in a single session. No plan to configure, nothing to sign up for.

Coming to the App Store

The program

The whole thing is one ladder of reps × seconds. You do the next step. If you finish it, you move on. If you don't, you do it again.

3×40 · 4×40 · 5×40 · 6×40 · MAX → 3×50 … → 5×12010s2:00

Twelve levels. Fifty-four steps. One rung a session.

Your first hold places you

Hold a plank for as long as you can. That single number puts you on the right rung — around 65–72% of your max — so you start where you actually are instead of at week one of someone else's plan. Already know your max? Type it in.

Add a rep, then add time

Add a rep until the level runs out, then the hold gets longer and the reps reset. This is double progression, and it's what the core-endurance research prescribes: increase the repetitions rather than the duration of the holds. It's also why the goal is five 2-minute holds instead of one ever-longer grind.

Failing a step costs nothing

Miss a step and you simply repeat it. Unlimited, no penalty, no streak to break. Each step is its own test, so there is nothing else to design.

A timer you can read from the floor

The clock is a line, not a ring. A plank is the one exercise where nothing moves, so the timer contracts from both ends toward the centre as the hold drains and expands back out while you rest. Work is stark white with no colour at all — colour is reserved, so slate always means recover and brass always means progress.

Haptics carry the session

You can't see the screen mid-hold. Ticks escalate into every transition, and every transition lands harder than any tick, so the two are never confused. Passing your best gets its own pulse.

What it doesn't do

Plankan is a training timer, not medical advice. If a plank hurts, stop.