Illustrative example – fictional idea

Example 14 · Fitness · B2B tool

Session-package tracker

A tool for independent personal trainers that counts the sessions left in each client's package and sends a payment reminder before it runs out.

Launchifier is a guided path: five stages, 45 tasks, and a go/no-go gate at the end of each stage. Below is every task this founder was given, what they did, and what the guide decided.

Outcome

Go – build it

Interviews done

21

Said they'd pay

7 of 9

Build budget

$120 of $1,000

The idea, as the founder entered it

“I'm a personal trainer in Minneapolis with about 25 clients. I want to build my own workout app, with my programs, videos and a progress tracker, so clients follow my plans between sessions, and I can sell it to people I'll never train in person. Other trainers I know want the same thing, and I think we could all share it. I've saved about $1,000 for this.”

The path the founder followed

Stage 1 of 5

Validate

Is this a real problem for a customer you can reach, who wants it solved?

Gate: Go. Move on to Define.

Tasks in this stage

15 of 16 done

  • ✓Describe who has the problem and what it is
  • ✓Log your first conversation
  • ✓Write why someone would switch
  • + 13 more

What the founder did: first pass: talked to 8 clients and 4 trainers about the workout app. Clients liked it but already had free workout apps, and none would pay on top of training. All 4 trainers, though, complained unprompted about chasing clients for money when a 10-session package runs out. Second pass: 9 more trainers, and 8 of them described the same problem.

What the guide flagged: the first pass ended in Pivot. Workout apps are crowded (Trainerize, TrueCoach, Future), and clients wouldn't pay. The guide pointed at what the trainer interviews kept returning to instead: package sessions slip by uncounted, and asking for the next payment feels awkward. That was a new problem to validate, not a feature to add.

Why Go: on the second pass, 8 of 9 trainers had the problem, most estimated losing 2–4 unpaid sessions a month at $60–80 each, and 7 of 9 said they'd pay $12–15 a month. The founder is a customer and knows dozens more. Weak spot noted: trainers employed by gyms usually can't bring outside tools.

Stage 2 of 5

Define

What's the smallest thing you can build that proves value?

Gate: Go. Start building.

Tasks in this stage

11 of 14 done

  • ✓List at least three feature ideas
  • ✓Write your metric and target
  • ✓Add your costs
  • + 11 more

What got cut: 7 features became 3. Cut: scheduling, workout plans, progress photos and client chat. Kept: the trainer logs each session with one tap, the app counts what's left in the client's package, and when two sessions remain the client gets a friendly payment reminder with a link. Trainers keep their own calendars.

Why Go: the three features remove the awkward conversation, which is the part trainers said they hated most. The target is concrete: every package renewed before it runs out, for the founder's own 25 clients, in the first month. It fits in about an eighth of the budget.

Core user flow

Session done → trainer taps once → count goes down → at two left, client gets a reminder and a payment link → paid → new package starts.

Explicitly not in v1

Workouts, scheduling, chat, progress tracking. Clients never log in; they get a text and pay.

Stage 3 of 5

Build

Can you build it with AI tools without losing control?

In progress · 2 of 5 tasks

Tasks in this stage

2 of 5 done

  • ✓Create your builder account and turn on two-step sign-in
  • ✓Find version history and try undoing a change
  • ▶Finish every milestone and pass its tests
  • + 2 more

Build path chosen: an AI app builder with a payment service for the links, no custom code. Trainerize's business plan does handle packages, but only as part of a full coaching platform at several times the price. The build is two milestones in: session logging works, and the payment link is next.

What the guide flagged: payment reminders are texts and emails to clients, so the founder needs their permission to send them and a way for them to stop. The guide also flagged that the app shouldn't store card details at all: the payment service holds them, and the app only ever sees "paid" or "not paid".

Budget

$1,000

Planned $120 · spent $40

Running cost

$25/mo

Builder plan + texts

Stages 4–5

Launch & Learn

Not started · 0 of 10 tasks

What the guide flagged: the launch plan is the founder's own 25 clients for a month, then the 7 trainers who said they'd pay, one at a time. No ads. The readiness check will look hardest at the payment links, and at making sure no trainer can ever see another trainer's clients.

Timeline

  1. Idea entered Sep 1
  2. Validate gate: Pivot. Change the idea and validate again. Sep 10
  3. Validate gate: Go Sep 22 · after 9 more trainer calls
  4. Define gate: Go. Start building. Oct 1
  5. Build in progress Oct 1 →

What this run got right

The first answer was no, and the founder listened to the part of the interviews that wasn't about the idea. Trainers kept complaining about money, not workouts. Coming back with that problem, instead of a reworded workout app, is why the second pass ended in Go.

What we’d watch

Trainers who work inside gyms usually bill through the gym, so the market is independents only. If the founder's network of independents runs dry after the first ten sign-ups, Learn will have to decide between selling to small studios and staying a tool for a few dozen trainers.

Have an idea like this?

Run it through the same five stages. The first one is free, and you’ll know by the end whether to keep going.

Run your idea

Illustrative examples are written to show the shape of a Launchifier run. Examples marked ‘sample run’ are unedited product output.