The stories behind KoachThe stories behind Koach

The clock next to an event shows who signed up, when, and who changed it afterwards. Built to prevent an argument, not to win one.

What a parent sees on their screen: their child’s next five events, the status in words, and everything the card deliberately leaves out.

Why Koach asks for two taps in the middle of a rally — and what simply does not exist without the second one.

Why a coach has no free hand to count, how you hand scorekeeping to a player, and exactly which numbers you trade away for it.

Why the time-out screen in Koach shows a window of a few minutes instead of the numbers for the whole set.

Where the libero stands, why he never serves, and how Koach now handles the libero substitution by itself.

What can you change between two sets without it counting as a substitution? Dennis walks through the set break screen, line by line.

Why Koach points at your weakest rotation but never tells you where to start — and what six bars say that one average hides.

On volleyball match stats after the game: playing time in rallies, an attendance list nobody ticks, and the line between coach and player.

Dennis Boekhout thought he substituted fairly, until he added up a whole season. On rallies, sets and a bench that quietly tilts.

No signal, a dead battery or an app that quits: where your match sits at that moment, and what really disappears.

Set on Wednesday, one player out on Saturday: how Dennis keeps several lineups saved and switches in three taps in the hall.

Three buttons per player, one percentage — and the question of which training evenings actually belong below the line.

How 194 of the 200 drills turned out to carry an error, and why a still image is exactly what hides it.

Five rows of stars after every session, an average only the coach sees, and two badges that quietly leave the player’s medal cabinet.

Why a drill in Koach is built from phases, how the arrows appear on their own, and why the homework has no tick box.

What Koach keeps when you close a volleyball season, what goes back to zero, and how last year sits beside this one.

How a session gets built in twenty minutes out of blocks, templates and reuse — and why starting from scratch every week breaks you.

On the difference between ticking boxes afterwards and knowing, hours ahead, how many players will actually be in the hall.

How to see mid-season whether a player is genuinely growing — and why a rising line is sometimes just the fixture list.

How Dennis keeps coaching notes on his players: one dated line per player, written as fact, and what never goes in.

The conversation every youth coach gets sooner or later, and what changes when playing time is something you can actually show.

From what age do you measure a young player, and how much of it should they see? Two questions, two separate answers.

What a player does and doesn’t get to see in their coach’s app — and why that line is drawn so tightly.

Twenty-four badges of which only four are about points, and a vote in which the coach deliberately has no say.

No membership database and no email addresses: how to invite fourteen players with one message, and why a fill-in counts towards nothing.

Two coaches on one team: how to get a colleague in, what they are allowed to do, and what you have to agree on yourselves.

Taking over a team mid-season: what comes with it from your predecessor, and why you leave it alone at first.

Why Koach shares the driving out by kilometre instead of by turn, and what it refuses to do without distances.

Why team selection in Koach stays a draft until the last moment, and what happens the second it becomes final.

What changes when you coach three teams instead of one: the week across every team, and items meant for a single player.

A team has one owner, and you can hand it over. Dennis Boekhout on who can reach team data and what the club really sees.

Two sessions, a match and a team chat that never goes quiet: Dennis adds up what coaching alongside a full-time job really costs.

Why volunteers drop out after one season, and what Dennis handed over to keep going: a second coach, the scoring and the driving.

Aren’t you on your phone all match? Dennis on the price of live scoring and the two ways out of it.

There is nothing to measure at our level, coaches keep telling him. He half agrees — and holds on to three numbers.

On the nights his impression clashed with the numbers, and the rule of thumb he falls back on when the two disagree.

Why there is no free ad-supported version, what a subscription costs, and when a coach is better off spending nothing.

A conversation about 16 years of volleyball, a team full of potential, and four apps that knew nothing about each other.